./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/iftelse.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/loops-crafted-1/iftelse.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 a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:07:57,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:07:57,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:07:57,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:07:57,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:07:57,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:07:57,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:07:57,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:07:57,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:07:57,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:07:57,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:07:57,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:07:57,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:07:57,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:07:57,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:07:57,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:07:57,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:07:57,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:07:57,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:07:57,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:07:57,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:07:57,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:07:57,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:07:57,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:07:57,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:07:57,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:07:57,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:07:57,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:07:57,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:07:57,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:07:57,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:07:57,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:07:57,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:07:57,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:07:57,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:07:57,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:07:57,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:07:57,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:07:57,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:07:57,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:07:57,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:07:57,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:07:57,891 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:07:57,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:07:57,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:07:57,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:07:57,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:07:57,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:07:57,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:07:57,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:07:57,893 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:07:57,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:07:57,894 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:07:57,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:07:57,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:07:57,896 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:07:57,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:07:57,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:07:57,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:07:57,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:07:57,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:07:57,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:07:57,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:07:57,898 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:07:57,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:07:57,898 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:07:57,898 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b [2023-02-15 20:07:58,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:07:58,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:07:58,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:07:58,102 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:07:58,102 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:07:58,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-02-15 20:07:59,144 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:07:59,297 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:07:59,297 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-02-15 20:07:59,301 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f07dd92b/b5b6b27a1bf0449b8273a5de7cc618d7/FLAG05fd93ec8 [2023-02-15 20:07:59,310 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f07dd92b/b5b6b27a1bf0449b8273a5de7cc618d7 [2023-02-15 20:07:59,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:07:59,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:07:59,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:07:59,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:07:59,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:07:59,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4772dbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59, skipping insertion in model container [2023-02-15 20:07:59,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:07:59,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:07:59,458 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-02-15 20:07:59,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:07:59,477 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:07:59,488 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-02-15 20:07:59,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:07:59,510 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:07:59,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59 WrapperNode [2023-02-15 20:07:59,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:07:59,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:07:59,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:07:59,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:07:59,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,534 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-02-15 20:07:59,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:07:59,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:07:59,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:07:59,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:07:59,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:07:59,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:07:59,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:07:59,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:07:59,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (1/1) ... [2023-02-15 20:07:59,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:07:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:59,602 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) [2023-02-15 20:07:59,644 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 [2023-02-15 20:07:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:07:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:07:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:07:59,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:07:59,729 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:07:59,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:07:59,810 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:07:59,813 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:07:59,814 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 20:07:59,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:07:59 BoogieIcfgContainer [2023-02-15 20:07:59,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:07:59,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:07:59,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:07:59,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:07:59,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:07:59" (1/3) ... [2023-02-15 20:07:59,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2643a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:07:59, skipping insertion in model container [2023-02-15 20:07:59,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:07:59" (2/3) ... [2023-02-15 20:07:59,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2643a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:07:59, skipping insertion in model container [2023-02-15 20:07:59,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:07:59" (3/3) ... [2023-02-15 20:07:59,821 INFO L112 eAbstractionObserver]: Analyzing ICFG iftelse.c [2023-02-15 20:07:59,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:07:59,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:07:59,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:07:59,885 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@83e395b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:07:59,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:07:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 20:07:59,892 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:59,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:59,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2023-02-15 20:07:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:59,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440343285] [2023-02-15 20:07:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:00,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440343285] [2023-02-15 20:08:00,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440343285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:08:00,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:08:00,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 20:08:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196032458] [2023-02-15 20:08:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:08:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:08:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:08:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:08:00,593 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:00,750 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-02-15 20:08:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:08:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 20:08:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:00,758 INFO L225 Difference]: With dead ends: 51 [2023-02-15 20:08:00,758 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 20:08:00,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:08:00,769 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:00,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 20:08:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2023-02-15 20:08:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-02-15 20:08:00,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2023-02-15 20:08:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:00,790 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-02-15 20:08:00,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-02-15 20:08:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 20:08:00,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:00,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:08:00,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1425053575, now seen corresponding path program 1 times [2023-02-15 20:08:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:00,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306126432] [2023-02-15 20:08:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306126432] [2023-02-15 20:08:00,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306126432] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:08:00,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:08:00,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:08:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427616741] [2023-02-15 20:08:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:08:00,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:08:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:08:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:08:00,815 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:00,822 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-02-15 20:08:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:08:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 20:08:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:00,823 INFO L225 Difference]: With dead ends: 22 [2023-02-15 20:08:00,823 INFO L226 Difference]: Without dead ends: 14 [2023-02-15 20:08:00,823 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 [2023-02-15 20:08:00,824 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 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 [2023-02-15 20:08:00,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:08:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-15 20:08:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-15 20:08:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-15 20:08:00,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2023-02-15 20:08:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:00,828 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-15 20:08:00,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-15 20:08:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 20:08:00,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:00,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:00,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 20:08:00,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2117156515, now seen corresponding path program 1 times [2023-02-15 20:08:00,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:00,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194249682] [2023-02-15 20:08:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:00,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:00,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194249682] [2023-02-15 20:08:00,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194249682] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:00,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695844568] [2023-02-15 20:08:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:00,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:00,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:00,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:00,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:08:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 20:08:01,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:01,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:01,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695844568] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:01,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:01,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 10] total 20 [2023-02-15 20:08:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684639121] [2023-02-15 20:08:01,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:01,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:08:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:08:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:08:01,720 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:06,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:07,444 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-02-15 20:08:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:08:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 20:08:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:07,445 INFO L225 Difference]: With dead ends: 47 [2023-02-15 20:08:07,445 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 20:08:07,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2023-02-15 20:08:07,447 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:07,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 83 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-02-15 20:08:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 20:08:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2023-02-15 20:08:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-15 20:08:07,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 13 [2023-02-15 20:08:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:07,454 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-15 20:08:07,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-15 20:08:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:08:07,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:07,455 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 20:08:07,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:08:07,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:07,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1209646399, now seen corresponding path program 1 times [2023-02-15 20:08:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76647713] [2023-02-15 20:08:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:08,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76647713] [2023-02-15 20:08:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76647713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486286851] [2023-02-15 20:08:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:08,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:08,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:08:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 20:08:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:08,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:14,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486286851] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:14,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:14,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2023-02-15 20:08:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471630133] [2023-02-15 20:08:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:14,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 20:08:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 20:08:14,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=733, Unknown=1, NotChecked=0, Total=930 [2023-02-15 20:08:14,933 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:28,537 WARN L233 SmtUtils]: Spent 11.73s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:08:29,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:31,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:41,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:48,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:53,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:55,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:08:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:57,599 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-02-15 20:08:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:08:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:08:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:57,601 INFO L225 Difference]: With dead ends: 64 [2023-02-15 20:08:57,601 INFO L226 Difference]: Without dead ends: 62 [2023-02-15 20:08:57,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=409, Invalid=1940, Unknown=3, NotChecked=0, Total=2352 [2023-02-15 20:08:57,602 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:57,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 99 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 300 Invalid, 5 Unknown, 0 Unchecked, 14.7s Time] [2023-02-15 20:08:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-15 20:08:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2023-02-15 20:08:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-02-15 20:08:57,623 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 23 [2023-02-15 20:08:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:57,623 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-02-15 20:08:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-02-15 20:08:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:08:57,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:57,625 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1] [2023-02-15 20:08:57,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 20:08:57,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 20:08:57,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash -493065576, now seen corresponding path program 2 times [2023-02-15 20:08:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571351968] [2023-02-15 20:08:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:58,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:58,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571351968] [2023-02-15 20:08:58,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571351968] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:58,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129366904] [2023-02-15 20:08:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:08:58,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:58,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:58,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:08:58,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:08:58,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 20:08:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:58,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:12,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129366904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:12,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:12,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 27 [2023-02-15 20:09:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93970515] [2023-02-15 20:09:12,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:09:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:09:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=512, Unknown=4, NotChecked=0, Total=702 [2023-02-15 20:09:12,962 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:15,219 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (mod (div (mod (+ |c_ULTIMATE.start_main_~i~0#1| 12) 4294967296) 2) 4294967296)) (.cse7 (mod (+ |c_ULTIMATE.start_main_~j~0#1| 9) 4294967296)) (.cse4 (mod (div (mod (+ |c_ULTIMATE.start_main_~i~0#1| 9) 4294967296) 2) 4294967296)) (.cse2 (mod (div (mod (+ |c_ULTIMATE.start_main_~i~0#1| 6) 4294967296) 2) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~j~0#1| 6) 4294967296)) (.cse1 (mod (div (mod (+ |c_ULTIMATE.start_main_~i~0#1| 3) 4294967296) 2) 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~j~0#1| 4294967296)) (.cse8 (mod (div (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 2) 4294967296)) (.cse3 (mod (+ |c_ULTIMATE.start_main_~j~0#1| 3) 4294967296))) (and (or (< .cse0 .cse1) (<= .cse2 .cse3)) (or (< .cse3 .cse4) (<= .cse5 .cse6)) (or (<= (mod (div (mod (+ |c_ULTIMATE.start_main_~i~0#1| 15) 4294967296) 2) 4294967296) .cse7) (< .cse6 .cse5)) (or (< .cse6 .cse4) (<= .cse5 .cse7)) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (or (<= .cse4 .cse6) (< .cse3 .cse2)) (<= .cse1 .cse3) (or (<= .cse2 .cse6) (< .cse3 .cse1)) (<= .cse8 .cse0) (<= .cse8 .cse3))) is different from false [2023-02-15 20:09:28,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:09:31,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:09:42,702 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:10:18,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:10:20,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:10:23,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:10:28,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:10:30,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 20:10:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:10:32,284 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-02-15 20:10:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:10:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 20:10:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:10:32,285 INFO L225 Difference]: With dead ends: 65 [2023-02-15 20:10:32,285 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 20:10:32,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=448, Invalid=1434, Unknown=14, NotChecked=84, Total=1980 [2023-02-15 20:10:32,295 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:10:32,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 111 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 6 Unknown, 1 Unchecked, 25.7s Time] [2023-02-15 20:10:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 20:10:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2023-02-15 20:10:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:10:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-02-15 20:10:32,308 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 28 [2023-02-15 20:10:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:10:32,309 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-02-15 20:10:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:10:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-02-15 20:10:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 20:10:32,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:10:32,310 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 1, 1, 1, 1, 1] [2023-02-15 20:10:32,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:10:32,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:10:32,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:10:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:10:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1973456345, now seen corresponding path program 3 times [2023-02-15 20:10:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:10:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219969591] [2023-02-15 20:10:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:10:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:10:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:10:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:10:33,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:10:33,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219969591] [2023-02-15 20:10:33,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219969591] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:10:33,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976067087] [2023-02-15 20:10:33,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:10:33,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:10:33,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:10:33,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:10:33,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:10:38,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:10:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:10:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 20:10:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 89 proven. 28 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-02-15 20:11:02,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:36,643 WARN L233 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 5041 DAG size of output: 3321 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)