./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/compact.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/compact.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 d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:25:58,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:25:58,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:25:58,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:25:58,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:25:58,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:25:58,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:25:58,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:25:58,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:25:58,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:25:58,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:25:58,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:25:58,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:25:58,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:25:58,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:25:58,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:25:58,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:25:58,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:25:58,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:25:58,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:25:58,296 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:25:58,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:25:58,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:25:58,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:25:58,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:25:58,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:25:58,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:25:58,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:25:58,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:25:58,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:25:58,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:25:58,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:25:58,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:25:58,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:25:58,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:25:58,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:25:58,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:25:58,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:25:58,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:25:58,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:25:58,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:25:58,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:25:58,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:25:58,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:25:58,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:25:58,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:25:58,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:25:58,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:25:58,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:25:58,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:25:58,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:25:58,345 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:25:58,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:25:58,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:25:58,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:25:58,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:25:58,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:25:58,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:25:58,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:25:58,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:25:58,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:25:58,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:25:58,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:25:58,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:25:58,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:25:58,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:25:58,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:25:58,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:25:58,349 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:25:58,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:25:58,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:25:58,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 [2022-07-21 02:25:58,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:25:58,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:25:58,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:25:58,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:25:58,660 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:25:58,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2022-07-21 02:25:58,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d123144c/a7d2a42f11d148bf9dd6a42d547871f0/FLAG0205ab81f [2022-07-21 02:25:59,083 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:25:59,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2022-07-21 02:25:59,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d123144c/a7d2a42f11d148bf9dd6a42d547871f0/FLAG0205ab81f [2022-07-21 02:25:59,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d123144c/a7d2a42f11d148bf9dd6a42d547871f0 [2022-07-21 02:25:59,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:25:59,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:25:59,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:25:59,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:25:59,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:25:59,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec00e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59, skipping insertion in model container [2022-07-21 02:25:59,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:25:59,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:25:59,669 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/loops/compact.c[609,622] [2022-07-21 02:25:59,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:25:59,681 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:25:59,697 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/loops/compact.c[609,622] [2022-07-21 02:25:59,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:25:59,715 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:25:59,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59 WrapperNode [2022-07-21 02:25:59,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:25:59,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:25:59,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:25:59,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:25:59,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,765 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-07-21 02:25:59,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:25:59,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:25:59,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:25:59,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:25:59,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:25:59,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:25:59,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:25:59,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:25:59,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (1/1) ... [2022-07-21 02:25:59,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:25:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:25:59,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 02:25:59,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 02:25:59,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 02:25:59,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:25:59,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:25:59,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:25:59,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:25:59,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:25:59,940 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:25:59,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:26:00,082 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:26:00,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:26:00,086 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:26:00,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:26:00 BoogieIcfgContainer [2022-07-21 02:26:00,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:26:00,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:26:00,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:26:00,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:26:00,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:25:59" (1/3) ... [2022-07-21 02:26:00,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589a0bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:26:00, skipping insertion in model container [2022-07-21 02:26:00,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:25:59" (2/3) ... [2022-07-21 02:26:00,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589a0bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:26:00, skipping insertion in model container [2022-07-21 02:26:00,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:26:00" (3/3) ... [2022-07-21 02:26:00,094 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2022-07-21 02:26:00,105 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:26:00,105 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:26:00,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:26:00,152 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@522d6c20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a337885 [2022-07-21 02:26:00,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:26:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) [2022-07-21 02:26:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:26:00,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:00,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:26:00,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 889605485, now seen corresponding path program 1 times [2022-07-21 02:26:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542360789] [2022-07-21 02:26:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:00,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:26:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:00,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542360789] [2022-07-21 02:26:00,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542360789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:26:00,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:26:00,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:26:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717615591] [2022-07-21 02:26:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:26:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:26:00,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:26:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:26:00,363 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 02:26:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:26:00,377 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-07-21 02:26:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:26:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-07-21 02:26:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:26:00,389 INFO L225 Difference]: With dead ends: 22 [2022-07-21 02:26:00,390 INFO L226 Difference]: Without dead ends: 10 [2022-07-21 02:26:00,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:26:00,396 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:26:00,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:26:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-21 02:26:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-21 02:26:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-21 02:26:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-21 02:26:00,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-21 02:26:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:26:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-21 02:26:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 02:26:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-21 02:26:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:26:00,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:00,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:26:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:26:00,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 889605144, now seen corresponding path program 1 times [2022-07-21 02:26:00,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:00,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326245900] [2022-07-21 02:26:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:26:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:00,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326245900] [2022-07-21 02:26:00,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326245900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:26:00,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:26:00,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:26:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687464435] [2022-07-21 02:26:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:26:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:26:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:26:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:26:00,487 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-21 02:26:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:26:00,524 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-21 02:26:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:26:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-07-21 02:26:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:26:00,526 INFO L225 Difference]: With dead ends: 21 [2022-07-21 02:26:00,526 INFO L226 Difference]: Without dead ends: 15 [2022-07-21 02:26:00,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:26:00,527 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:26:00,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:26:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-21 02:26:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2022-07-21 02:26:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-07-21 02:26:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-21 02:26:00,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2022-07-21 02:26:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:26:00,535 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-21 02:26:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-21 02:26:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-21 02:26:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 02:26:00,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:00,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:26:00,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:26:00,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1566455322, now seen corresponding path program 1 times [2022-07-21 02:26:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109080683] [2022-07-21 02:26:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:26:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109080683] [2022-07-21 02:26:00,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109080683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:26:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353916429] [2022-07-21 02:26:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:26:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:26:00,664 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) [2022-07-21 02:26:00,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:26:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:26:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:26:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:26:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:26:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:26:00,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353916429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:26:00,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:26:00,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:26:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418742452] [2022-07-21 02:26:00,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:26:00,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:26:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:26:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:26:00,777 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-07-21 02:26:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:26:00,853 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-07-21 02:26:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:26:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) Word has length 11 [2022-07-21 02:26:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:26:00,854 INFO L225 Difference]: With dead ends: 34 [2022-07-21 02:26:00,854 INFO L226 Difference]: Without dead ends: 27 [2022-07-21 02:26:00,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:26:00,855 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:26:00,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:26:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-21 02:26:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-21 02:26:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2022-07-21 02:26:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-21 02:26:00,860 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2022-07-21 02:26:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:26:00,860 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-21 02:26:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-07-21 02:26:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-21 02:26:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 02:26:00,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:00,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:26:00,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:26:01,068 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 [2022-07-21 02:26:01,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash -463491552, now seen corresponding path program 2 times [2022-07-21 02:26:01,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:01,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862395172] [2022-07-21 02:26:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:26:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862395172] [2022-07-21 02:26:01,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862395172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:26:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332769793] [2022-07-21 02:26:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:26:01,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:26:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:26:01,232 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) [2022-07-21 02:26:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:26:01,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:26:01,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:26:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:26:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:26:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:26:01,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:26:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:26:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332769793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:26:01,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:26:01,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 02:26:01,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624796400] [2022-07-21 02:26:01,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:26:01,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:26:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:26:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:26:01,467 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-07-21 02:26:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:26:01,878 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-21 02:26:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:26:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 26 [2022-07-21 02:26:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:26:01,879 INFO L225 Difference]: With dead ends: 73 [2022-07-21 02:26:01,880 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 02:26:01,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:26:01,881 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:26:01,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:26:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 02:26:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 02:26:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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) [2022-07-21 02:26:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-21 02:26:01,897 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 26 [2022-07-21 02:26:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:26:01,897 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-21 02:26:01,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-07-21 02:26:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-21 02:26:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 02:26:01,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:01,900 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-21 02:26:01,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:26:02,107 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 [2022-07-21 02:26:02,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -719637204, now seen corresponding path program 3 times [2022-07-21 02:26:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25319096] [2022-07-21 02:26:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 02:26:02,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:02,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25319096] [2022-07-21 02:26:02,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25319096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:26:02,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797702415] [2022-07-21 02:26:02,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:26:02,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:26:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:26:02,359 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) [2022-07-21 02:26:02,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:26:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 02:26:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:26:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 02:26:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:26:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 02:26:04,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:26:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 02:26:04,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797702415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:26:04,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:26:04,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-21 02:26:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390512672] [2022-07-21 02:26:04,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:26:04,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 02:26:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 02:26:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-07-21 02:26:04,708 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 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) [2022-07-21 02:26:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:26:09,533 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2022-07-21 02:26:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 02:26:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 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 56 [2022-07-21 02:26:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:26:09,534 INFO L225 Difference]: With dead ends: 151 [2022-07-21 02:26:09,534 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 02:26:09,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:26:09,535 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 02:26:09,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 164 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 02:26:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 02:26:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-21 02:26:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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) [2022-07-21 02:26:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-21 02:26:09,547 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 56 [2022-07-21 02:26:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:26:09,548 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-21 02:26:09,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 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) [2022-07-21 02:26:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-21 02:26:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 02:26:09,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:26:09,551 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-07-21 02:26:09,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:26:09,757 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 [2022-07-21 02:26:09,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:26:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:26:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash -604959932, now seen corresponding path program 4 times [2022-07-21 02:26:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:26:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110807441] [2022-07-21 02:26:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:26:09,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:26:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:26:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-21 02:26:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:26:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110807441] [2022-07-21 02:26:10,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110807441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:26:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386977935] [2022-07-21 02:26:10,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:26:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:26:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:26:10,267 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) [2022-07-21 02:26:10,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:26:15,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:26:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:26:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 02:26:15,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:26:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-21 02:26:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:26:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-21 02:26:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386977935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:26:16,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:26:16,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-21 02:26:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882810620] [2022-07-21 02:26:16,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:26:16,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 02:26:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:26:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 02:26:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 02:26:16,420 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-07-21 02:27:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:27:46,749 INFO L93 Difference]: Finished difference Result 307 states and 356 transitions. [2022-07-21 02:27:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 02:27:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 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 116 [2022-07-21 02:27:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:27:46,751 INFO L225 Difference]: With dead ends: 307 [2022-07-21 02:27:46,751 INFO L226 Difference]: Without dead ends: 237 [2022-07-21 02:27:46,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2022-07-21 02:27:46,754 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 765 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 02:27:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 610 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 02:27:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-21 02:27:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-07-21 02:27:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 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) [2022-07-21 02:27:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2022-07-21 02:27:46,778 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 116 [2022-07-21 02:27:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:27:46,778 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2022-07-21 02:27:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-07-21 02:27:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2022-07-21 02:27:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-21 02:27:46,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:27:46,784 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-07-21 02:27:46,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 02:27:46,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:27:46,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:27:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:27:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1658529932, now seen corresponding path program 5 times [2022-07-21 02:27:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:27:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899570542] [2022-07-21 02:27:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:27:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:27:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:27:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-07-21 02:27:48,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:27:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899570542] [2022-07-21 02:27:48,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899570542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:27:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145587944] [2022-07-21 02:27:48,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:27:48,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:27:48,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:27:48,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:27:48,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process