./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested5-2.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 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:50:50,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:50:50,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:50:50,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:50:50,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:50:50,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:50:50,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:50:50,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:50:50,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:50:50,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:50:50,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:50:50,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:50:50,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:50:50,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:50:50,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:50:50,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:50:50,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:50:50,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:50:50,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:50:50,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:50:50,272 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:50:50,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:50:50,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:50:50,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:50:50,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:50:50,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:50:50,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:50:50,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:50:50,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:50:50,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:50:50,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:50:50,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:50:50,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:50:50,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:50:50,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:50:50,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:50:50,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:50:50,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:50:50,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:50:50,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:50:50,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:50:50,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:50:50,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:50:50,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:50:50,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:50:50,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:50:50,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:50:50,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:50:50,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:50:50,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:50:50,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:50:50,301 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:50:50,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:50:50,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:50:50,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:50:50,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:50:50,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:50:50,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:50:50,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:50:50,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:50:50,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:50:50,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:50:50,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:50:50,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:50:50,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:50:50,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:50:50,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:50:50,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:50:50,305 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:50:50,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:50:50,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:50:50,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 [2022-07-13 15:50:50,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:50:50,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:50:50,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:50:50,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:50:50,469 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:50:50,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2022-07-13 15:50:50,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a556e6f4b/3d3934d39cf745b2be93a8aea65cb46f/FLAG42d47df6f [2022-07-13 15:50:50,882 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:50:50,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2022-07-13 15:50:50,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a556e6f4b/3d3934d39cf745b2be93a8aea65cb46f/FLAG42d47df6f [2022-07-13 15:50:50,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a556e6f4b/3d3934d39cf745b2be93a8aea65cb46f [2022-07-13 15:50:50,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:50:50,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:50:50,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:50:50,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:50:50,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:50:50,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:50:50" (1/1) ... [2022-07-13 15:50:50,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2266ded4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:50, skipping insertion in model container [2022-07-13 15:50:50,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:50:50" (1/1) ... [2022-07-13 15:50:50,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:50:50,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:50:51,091 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-crafted-1/nested5-2.c[321,334] [2022-07-13 15:50:51,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:50:51,111 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:50:51,120 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-crafted-1/nested5-2.c[321,334] [2022-07-13 15:50:51,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:50:51,141 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:50:51,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51 WrapperNode [2022-07-13 15:50:51,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:50:51,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:50:51,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:50:51,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:50:51,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,167 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-13 15:50:51,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:50:51,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:50:51,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:50:51,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:50:51,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:50:51,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:50:51,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:50:51,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:50:51,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (1/1) ... [2022-07-13 15:50:51,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:50:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:50:51,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:50:51,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:50:51,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:50:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:50:51,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:50:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:50:51,271 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:50:51,272 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:50:51,350 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:50:51,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:50:51,353 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-13 15:50:51,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:50:51 BoogieIcfgContainer [2022-07-13 15:50:51,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:50:51,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:50:51,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:50:51,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:50:51,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:50:50" (1/3) ... [2022-07-13 15:50:51,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b93b080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:50:51, skipping insertion in model container [2022-07-13 15:50:51,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:50:51" (2/3) ... [2022-07-13 15:50:51,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b93b080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:50:51, skipping insertion in model container [2022-07-13 15:50:51,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:50:51" (3/3) ... [2022-07-13 15:50:51,360 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2022-07-13 15:50:51,368 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:50:51,369 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:50:51,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:50:51,400 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@17688a2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10de01e1 [2022-07-13 15:50:51,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:50:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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) [2022-07-13 15:50:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:50:51,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:50:51,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:50:51,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:50:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:50:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1296464707, now seen corresponding path program 1 times [2022-07-13 15:50:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:50:51,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804935000] [2022-07-13 15:50:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:50:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:50:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:50:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:50:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804935000] [2022-07-13 15:50:51,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804935000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:50:51,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:50:51,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:50:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372158337] [2022-07-13 15:50:51,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:50:51,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:50:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:50:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:50:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:50:51,659 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 15:50:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:50:51,700 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2022-07-13 15:50:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:50:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-07-13 15:50:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:50:51,721 INFO L225 Difference]: With dead ends: 53 [2022-07-13 15:50:51,722 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 15:50:51,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:50:51,726 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:50:51,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:50:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 15:50:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-07-13 15:50:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-07-13 15:50:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-13 15:50:51,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-07-13 15:50:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:50:51,746 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-13 15:50:51,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 15:50:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-13 15:50:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 15:50:51,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:50:51,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:50:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:50:51,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:50:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:50:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -308834241, now seen corresponding path program 1 times [2022-07-13 15:50:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:50:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840683390] [2022-07-13 15:50:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:50:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:50:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:50:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:51,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:50:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840683390] [2022-07-13 15:50:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840683390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:50:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691881848] [2022-07-13 15:50:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:50:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:50:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:50:51,827 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) [2022-07-13 15:50:51,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:50:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:50:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:50:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:50:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:50:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:51,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691881848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:50:51,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:50:51,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 15:50:51,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666122332] [2022-07-13 15:50:51,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:50:51,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 15:50:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:50:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 15:50:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:50:51,920 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-07-13 15:50:51,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:50:51,970 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-07-13 15:50:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:50:51,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 12 [2022-07-13 15:50:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:50:51,971 INFO L225 Difference]: With dead ends: 47 [2022-07-13 15:50:51,972 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 15:50:51,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:50:51,973 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:50:51,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:50:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 15:50:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-07-13 15:50:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-07-13 15:50:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-13 15:50:51,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2022-07-13 15:50:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:50:51,978 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-13 15:50:51,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-07-13 15:50:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-13 15:50:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:50:51,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:50:51,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:50:51,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 15:50:52,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:50:52,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:50:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:50:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 83697605, now seen corresponding path program 2 times [2022-07-13 15:50:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:50:52,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69175029] [2022-07-13 15:50:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:50:52,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:50:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:50:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:52,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:50:52,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69175029] [2022-07-13 15:50:52,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69175029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:50:52,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209605467] [2022-07-13 15:50:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:50:52,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:50:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:50:52,277 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) [2022-07-13 15:50:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:50:52,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:50:52,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:50:52,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 15:50:52,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:50:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:52,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:50:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:52,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209605467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:50:52,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:50:52,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 15:50:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588276344] [2022-07-13 15:50:52,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:50:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:50:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:50:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:50:52,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:50:52,491 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-07-13 15:50:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:50:52,705 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-07-13 15:50:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:50:52,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) Word has length 18 [2022-07-13 15:50:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:50:52,707 INFO L225 Difference]: With dead ends: 65 [2022-07-13 15:50:52,707 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 15:50:52,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:50:52,708 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:50:52,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 145 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:50:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 15:50:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-13 15:50:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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) [2022-07-13 15:50:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-13 15:50:52,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 18 [2022-07-13 15:50:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:50:52,713 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-13 15:50:52,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-07-13 15:50:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-13 15:50:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:50:52,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:50:52,715 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:50:52,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:50:52,915 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,SelfDestructingSolverStorable2 [2022-07-13 15:50:52,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:50:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:50:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1185224367, now seen corresponding path program 3 times [2022-07-13 15:50:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:50:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43569178] [2022-07-13 15:50:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:50:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:50:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:50:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:50:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43569178] [2022-07-13 15:50:53,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43569178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:50:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993032849] [2022-07-13 15:50:53,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:50:53,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:50:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:50:53,147 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) [2022-07-13 15:50:53,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:50:53,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 15:50:53,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:50:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 15:50:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:50:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:53,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:50:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:50:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993032849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:50:53,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:50:53,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 27 [2022-07-13 15:50:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170191218] [2022-07-13 15:50:53,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:50:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:50:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:50:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:50:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:50:53,749 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2022-07-13 15:51:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:51:40,952 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-07-13 15:51:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 15:51:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 30 [2022-07-13 15:51:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:51:40,954 INFO L225 Difference]: With dead ends: 159 [2022-07-13 15:51:40,954 INFO L226 Difference]: Without dead ends: 125 [2022-07-13 15:51:40,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=1079, Invalid=2460, Unknown=1, NotChecked=0, Total=3540 [2022-07-13 15:51:40,956 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:51:40,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 327 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:51:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-13 15:51:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 62. [2022-07-13 15:51:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 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) [2022-07-13 15:51:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-07-13 15:51:40,965 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 30 [2022-07-13 15:51:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:51:40,965 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-07-13 15:51:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2022-07-13 15:51:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-07-13 15:51:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 15:51:40,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:51:40,967 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:51:40,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 15:51:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:51:41,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:51:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:51:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash -29907351, now seen corresponding path program 4 times [2022-07-13 15:51:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:51:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553290228] [2022-07-13 15:51:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:51:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:51:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:51:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:51:41,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:51:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553290228] [2022-07-13 15:51:41,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553290228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:51:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208498105] [2022-07-13 15:51:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:51:41,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:51:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:51:41,593 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) [2022-07-13 15:51:41,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:51:41,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:51:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:51:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 15:51:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:51:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:51:41,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:51:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:51:42,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208498105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:51:42,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:51:42,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-13 15:51:42,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103974546] [2022-07-13 15:51:42,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:51:42,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 15:51:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:51:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 15:51:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 15:51:42,797 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 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) [2022-07-13 15:53:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:53:35,778 INFO L93 Difference]: Finished difference Result 175 states and 212 transitions. [2022-07-13 15:53:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 15:53:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 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 54 [2022-07-13 15:53:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:53:35,779 INFO L225 Difference]: With dead ends: 175 [2022-07-13 15:53:35,779 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 15:53:35,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 113.6s TimeCoverageRelationStatistics Valid=1744, Invalid=3222, Unknown=4, NotChecked=0, Total=4970 [2022-07-13 15:53:35,781 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:53:35,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 577 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:53:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 15:53:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2022-07-13 15:53:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 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) [2022-07-13 15:53:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-07-13 15:53:35,789 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 54 [2022-07-13 15:53:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:53:35,790 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-07-13 15:53:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 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) [2022-07-13 15:53:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-07-13 15:53:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 15:53:35,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:53:35,792 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:53:35,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 15:53:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:53:36,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:53:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:53:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1528182631, now seen corresponding path program 5 times [2022-07-13 15:53:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:53:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844944983] [2022-07-13 15:53:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:53:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:53:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:53:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:53:37,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:53:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844944983] [2022-07-13 15:53:37,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844944983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:53:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810748222] [2022-07-13 15:53:37,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:53:37,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:53:37,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:53:37,189 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) [2022-07-13 15:53:37,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process