./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label23.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 f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:31:24,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:31:24,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:31:24,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:31:24,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:31:24,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:31:24,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:31:24,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:31:24,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:31:24,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:31:24,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:31:24,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:31:24,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:31:24,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:31:24,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:31:24,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:31:24,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:31:24,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:31:24,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:31:24,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:31:24,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:31:24,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:31:24,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:31:24,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:31:24,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:31:24,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:31:24,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:31:24,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:31:24,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:31:24,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:31:24,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:31:24,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:31:24,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:31:24,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:31:24,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:31:24,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:31:24,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:31:24,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:31:24,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:31:24,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:31:24,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:31:24,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:31:24,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:31:24,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:31:24,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:31:24,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:31:24,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:31:24,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:31:24,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:31:24,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:31:24,397 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:31:24,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:31:24,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:31:24,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:31:24,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:31:24,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:31:24,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:31:24,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:31:24,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:31:24,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:31:24,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:31:24,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:31:24,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:31:24,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:31:24,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:31:24,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:31:24,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:31:24,402 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:31:24,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:31:24,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:31:24,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:31:24,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 [2021-12-17 03:31:24,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:31:24,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:31:24,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:31:24,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:31:24,657 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:31:24,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-17 03:31:24,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469b9a827/cfe67ed27176407eb0b86d349fa99605/FLAGdbd46c36e [2021-12-17 03:31:25,176 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:31:25,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-17 03:31:25,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469b9a827/cfe67ed27176407eb0b86d349fa99605/FLAGdbd46c36e [2021-12-17 03:31:25,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469b9a827/cfe67ed27176407eb0b86d349fa99605 [2021-12-17 03:31:25,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:31:25,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:31:25,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:31:25,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:31:25,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:31:25,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45adda53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25, skipping insertion in model container [2021-12-17 03:31:25,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:31:25,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:31:25,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-17 03:31:25,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:31:25,665 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:31:25,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-17 03:31:25,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:31:25,815 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:31:25,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25 WrapperNode [2021-12-17 03:31:25,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:31:25,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:31:25,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:31:25,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:31:25,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,896 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:31:25,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:31:25,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:31:25,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:31:25,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:31:25,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:25,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:26,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:31:26,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:31:26,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:31:26,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:31:26,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (1/1) ... [2021-12-17 03:31:26,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:31:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:26,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:31:26,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:31:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:31:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:31:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:31:26,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:31:26,243 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:31:26,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:31:27,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:31:27,419 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:31:27,420 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:31:27,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:27 BoogieIcfgContainer [2021-12-17 03:31:27,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:31:27,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:31:27,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:31:27,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:31:27,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:31:25" (1/3) ... [2021-12-17 03:31:27,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625bec8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:27, skipping insertion in model container [2021-12-17 03:31:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:25" (2/3) ... [2021-12-17 03:31:27,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625bec8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:27, skipping insertion in model container [2021-12-17 03:31:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:27" (3/3) ... [2021-12-17 03:31:27,427 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label23.c [2021-12-17 03:31:27,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:31:27,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:31:27,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:31:27,473 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:31:27,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:31:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2021-12-17 03:31:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:31:27,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:27,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:27,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 552287235, now seen corresponding path program 1 times [2021-12-17 03:31:27,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174540448] [2021-12-17 03:31:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:27,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:27,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:27,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174540448] [2021-12-17 03:31:27,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174540448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:27,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:27,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988976124] [2021-12-17 03:31:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:27,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:27,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:27,926 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-17 03:31:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:28,761 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2021-12-17 03:31:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2021-12-17 03:31:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:28,772 INFO L225 Difference]: With dead ends: 810 [2021-12-17 03:31:28,772 INFO L226 Difference]: Without dead ends: 444 [2021-12-17 03:31:28,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:28,777 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 83 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:28,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:31:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-17 03:31:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-12-17 03:31:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 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) [2021-12-17 03:31:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2021-12-17 03:31:28,815 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 171 [2021-12-17 03:31:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:28,816 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2021-12-17 03:31:28,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-17 03:31:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2021-12-17 03:31:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 03:31:28,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:28,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:28,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:31:28,819 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 48412932, now seen corresponding path program 1 times [2021-12-17 03:31:28,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316660130] [2021-12-17 03:31:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:28,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:28,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316660130] [2021-12-17 03:31:28,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316660130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:28,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:28,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:28,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087711471] [2021-12-17 03:31:28,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:28,869 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-12-17 03:31:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:29,474 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2021-12-17 03:31:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 179 [2021-12-17 03:31:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:29,477 INFO L225 Difference]: With dead ends: 1312 [2021-12-17 03:31:29,477 INFO L226 Difference]: Without dead ends: 870 [2021-12-17 03:31:29,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:29,479 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:29,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-12-17 03:31:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2021-12-17 03:31:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3953216374269006) internal successors, (1193), 855 states have internal predecessors, (1193), 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) [2021-12-17 03:31:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1193 transitions. [2021-12-17 03:31:29,543 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1193 transitions. Word has length 179 [2021-12-17 03:31:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:29,545 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1193 transitions. [2021-12-17 03:31:29,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-12-17 03:31:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1193 transitions. [2021-12-17 03:31:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-17 03:31:29,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:29,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:29,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:31:29,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1529135225, now seen corresponding path program 1 times [2021-12-17 03:31:29,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:29,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956679030] [2021-12-17 03:31:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:29,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:31:29,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956679030] [2021-12-17 03:31:29,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956679030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:29,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:29,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:29,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117840784] [2021-12-17 03:31:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:29,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:29,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:29,852 INFO L87 Difference]: Start difference. First operand 856 states and 1193 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-12-17 03:31:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:30,420 INFO L93 Difference]: Finished difference Result 2535 states and 3534 transitions. [2021-12-17 03:31:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 186 [2021-12-17 03:31:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:30,426 INFO L225 Difference]: With dead ends: 2535 [2021-12-17 03:31:30,426 INFO L226 Difference]: Without dead ends: 1681 [2021-12-17 03:31:30,428 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:31:30,429 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 114 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:30,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 365 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-12-17 03:31:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1680. [2021-12-17 03:31:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 1.3097081596188207) internal successors, (2199), 1679 states have internal predecessors, (2199), 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) [2021-12-17 03:31:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2199 transitions. [2021-12-17 03:31:30,451 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2199 transitions. Word has length 186 [2021-12-17 03:31:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:30,451 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2199 transitions. [2021-12-17 03:31:30,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-12-17 03:31:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2199 transitions. [2021-12-17 03:31:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-17 03:31:30,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:30,454 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:30,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:31:30,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1891170029, now seen corresponding path program 1 times [2021-12-17 03:31:30,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922277286] [2021-12-17 03:31:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:30,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:31:30,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922277286] [2021-12-17 03:31:30,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922277286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:30,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:30,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:30,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753563973] [2021-12-17 03:31:30,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:30,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:30,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:30,513 INFO L87 Difference]: Start difference. First operand 1680 states and 2199 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-12-17 03:31:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:31,130 INFO L93 Difference]: Finished difference Result 4182 states and 5462 transitions. [2021-12-17 03:31:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 192 [2021-12-17 03:31:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:31,137 INFO L225 Difference]: With dead ends: 4182 [2021-12-17 03:31:31,137 INFO L226 Difference]: Without dead ends: 2504 [2021-12-17 03:31:31,139 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:31:31,140 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 224 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 369 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-12-17 03:31:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2499. [2021-12-17 03:31:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.2618094475580464) internal successors, (3152), 2498 states have internal predecessors, (3152), 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) [2021-12-17 03:31:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3152 transitions. [2021-12-17 03:31:31,172 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3152 transitions. Word has length 192 [2021-12-17 03:31:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:31,172 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 3152 transitions. [2021-12-17 03:31:31,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-12-17 03:31:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3152 transitions. [2021-12-17 03:31:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-17 03:31:31,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:31,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:31,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:31:31,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -275852577, now seen corresponding path program 1 times [2021-12-17 03:31:31,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681936753] [2021-12-17 03:31:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:31,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:31:31,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681936753] [2021-12-17 03:31:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681936753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:31,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:31,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:31,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108774658] [2021-12-17 03:31:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:31,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:31,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:31,228 INFO L87 Difference]: Start difference. First operand 2499 states and 3152 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2021-12-17 03:31:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:31,830 INFO L93 Difference]: Finished difference Result 4969 states and 6268 transitions. [2021-12-17 03:31:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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 196 [2021-12-17 03:31:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:31,837 INFO L225 Difference]: With dead ends: 4969 [2021-12-17 03:31:31,837 INFO L226 Difference]: Without dead ends: 2472 [2021-12-17 03:31:31,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:31,839 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 472 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:31,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 44 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-12-17 03:31:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2468. [2021-12-17 03:31:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.2160518848804216) internal successors, (3000), 2467 states have internal predecessors, (3000), 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) [2021-12-17 03:31:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3000 transitions. [2021-12-17 03:31:31,863 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3000 transitions. Word has length 196 [2021-12-17 03:31:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:31,864 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3000 transitions. [2021-12-17 03:31:31,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2021-12-17 03:31:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3000 transitions. [2021-12-17 03:31:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-17 03:31:31,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:31,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:31,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:31:31,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 694043869, now seen corresponding path program 1 times [2021-12-17 03:31:31,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:31,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588352638] [2021-12-17 03:31:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:31,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:31,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:31,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588352638] [2021-12-17 03:31:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588352638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:31,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:31,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:31,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523488056] [2021-12-17 03:31:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:31,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:31,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:31,916 INFO L87 Difference]: Start difference. First operand 2468 states and 3000 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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) [2021-12-17 03:31:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:32,464 INFO L93 Difference]: Finished difference Result 7381 states and 8973 transitions. [2021-12-17 03:31:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 199 [2021-12-17 03:31:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:32,476 INFO L225 Difference]: With dead ends: 7381 [2021-12-17 03:31:32,476 INFO L226 Difference]: Without dead ends: 4915 [2021-12-17 03:31:32,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:32,479 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:32,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 114 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-12-17 03:31:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4909. [2021-12-17 03:31:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.176242868785656) internal successors, (5773), 4908 states have internal predecessors, (5773), 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) [2021-12-17 03:31:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 5773 transitions. [2021-12-17 03:31:32,564 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 5773 transitions. Word has length 199 [2021-12-17 03:31:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:32,564 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 5773 transitions. [2021-12-17 03:31:32,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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) [2021-12-17 03:31:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 5773 transitions. [2021-12-17 03:31:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-17 03:31:32,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:32,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:31:32,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1665057800, now seen corresponding path program 1 times [2021-12-17 03:31:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:32,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692817409] [2021-12-17 03:31:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:32,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:32,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692817409] [2021-12-17 03:31:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692817409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:32,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:32,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:32,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296346264] [2021-12-17 03:31:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:32,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:32,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:32,633 INFO L87 Difference]: Start difference. First operand 4909 states and 5773 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-17 03:31:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:33,657 INFO L93 Difference]: Finished difference Result 10432 states and 12347 transitions. [2021-12-17 03:31:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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 208 [2021-12-17 03:31:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:33,670 INFO L225 Difference]: With dead ends: 10432 [2021-12-17 03:31:33,670 INFO L226 Difference]: Without dead ends: 5525 [2021-12-17 03:31:33,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:33,674 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 418 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:33,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 96 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:31:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-12-17 03:31:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4909. [2021-12-17 03:31:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.176242868785656) internal successors, (5773), 4908 states have internal predecessors, (5773), 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) [2021-12-17 03:31:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 5773 transitions. [2021-12-17 03:31:33,755 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 5773 transitions. Word has length 208 [2021-12-17 03:31:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:33,755 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 5773 transitions. [2021-12-17 03:31:33,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-17 03:31:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 5773 transitions. [2021-12-17 03:31:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-17 03:31:33,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:33,764 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:33,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:31:33,764 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1373146291, now seen corresponding path program 1 times [2021-12-17 03:31:33,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884921122] [2021-12-17 03:31:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:33,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 03:31:33,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:33,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884921122] [2021-12-17 03:31:33,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884921122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142187132] [2021-12-17 03:31:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:33,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:33,840 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) [2021-12-17 03:31:33,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:31:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:33,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:31:34,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:34,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142187132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:34,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:34,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:34,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972342877] [2021-12-17 03:31:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:34,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:34,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:34,300 INFO L87 Difference]: Start difference. First operand 4909 states and 5773 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-17 03:31:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:35,030 INFO L93 Difference]: Finished difference Result 12257 states and 14661 transitions. [2021-12-17 03:31:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 215 [2021-12-17 03:31:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:35,046 INFO L225 Difference]: With dead ends: 12257 [2021-12-17 03:31:35,046 INFO L226 Difference]: Without dead ends: 7350 [2021-12-17 03:31:35,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:35,051 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:35,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 370 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:31:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7350 states. [2021-12-17 03:31:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7350 to 7345. [2021-12-17 03:31:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 1.142020697167756) internal successors, (8387), 7344 states have internal predecessors, (8387), 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) [2021-12-17 03:31:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 8387 transitions. [2021-12-17 03:31:35,158 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 8387 transitions. Word has length 215 [2021-12-17 03:31:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:35,158 INFO L470 AbstractCegarLoop]: Abstraction has 7345 states and 8387 transitions. [2021-12-17 03:31:35,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-17 03:31:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 8387 transitions. [2021-12-17 03:31:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-17 03:31:35,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:35,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:35,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:35,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:35,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1740772773, now seen corresponding path program 1 times [2021-12-17 03:31:35,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:35,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035657572] [2021-12-17 03:31:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:35,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:31:35,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:35,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035657572] [2021-12-17 03:31:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035657572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317202373] [2021-12-17 03:31:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:35,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:35,470 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) [2021-12-17 03:31:35,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:31:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:31:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:31:35,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:35,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317202373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:35,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:35,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:35,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150456574] [2021-12-17 03:31:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:35,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:35,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:35,937 INFO L87 Difference]: Start difference. First operand 7345 states and 8387 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-17 03:31:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:36,708 INFO L93 Difference]: Finished difference Result 23048 states and 26486 transitions. [2021-12-17 03:31:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:36,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 219 [2021-12-17 03:31:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:36,732 INFO L225 Difference]: With dead ends: 23048 [2021-12-17 03:31:36,735 INFO L226 Difference]: Without dead ends: 15705 [2021-12-17 03:31:36,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:36,747 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 523 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:36,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 478 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:31:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15705 states. [2021-12-17 03:31:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15705 to 15694. [2021-12-17 03:31:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15694 states, 15693 states have (on average 1.146052380042057) internal successors, (17985), 15693 states have internal predecessors, (17985), 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) [2021-12-17 03:31:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15694 states to 15694 states and 17985 transitions. [2021-12-17 03:31:36,983 INFO L78 Accepts]: Start accepts. Automaton has 15694 states and 17985 transitions. Word has length 219 [2021-12-17 03:31:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:36,983 INFO L470 AbstractCegarLoop]: Abstraction has 15694 states and 17985 transitions. [2021-12-17 03:31:36,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-17 03:31:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 15694 states and 17985 transitions. [2021-12-17 03:31:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-17 03:31:36,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:36,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:37,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:37,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 03:31:37,192 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1801431692, now seen corresponding path program 1 times [2021-12-17 03:31:37,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837247689] [2021-12-17 03:31:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:37,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:37,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837247689] [2021-12-17 03:31:37,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837247689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:37,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:37,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:37,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668836194] [2021-12-17 03:31:37,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:37,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:37,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:37,334 INFO L87 Difference]: Start difference. First operand 15694 states and 17985 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-12-17 03:31:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:37,925 INFO L93 Difference]: Finished difference Result 36685 states and 41963 transitions. [2021-12-17 03:31:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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 222 [2021-12-17 03:31:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:37,948 INFO L225 Difference]: With dead ends: 36685 [2021-12-17 03:31:37,949 INFO L226 Difference]: Without dead ends: 20993 [2021-12-17 03:31:37,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:37,962 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 210 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:37,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 91 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20993 states. [2021-12-17 03:31:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20993 to 20987. [2021-12-17 03:31:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20987 states, 20986 states have (on average 1.1403793004860383) internal successors, (23932), 20986 states have internal predecessors, (23932), 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) [2021-12-17 03:31:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20987 states to 20987 states and 23932 transitions. [2021-12-17 03:31:38,315 INFO L78 Accepts]: Start accepts. Automaton has 20987 states and 23932 transitions. Word has length 222 [2021-12-17 03:31:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:38,316 INFO L470 AbstractCegarLoop]: Abstraction has 20987 states and 23932 transitions. [2021-12-17 03:31:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-12-17 03:31:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20987 states and 23932 transitions. [2021-12-17 03:31:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-17 03:31:38,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:38,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:38,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:31:38,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 365918053, now seen corresponding path program 1 times [2021-12-17 03:31:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211807849] [2021-12-17 03:31:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:38,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:38,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211807849] [2021-12-17 03:31:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211807849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:38,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:38,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:38,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114957108] [2021-12-17 03:31:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:38,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:38,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:38,434 INFO L87 Difference]: Start difference. First operand 20987 states and 23932 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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) [2021-12-17 03:31:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:39,040 INFO L93 Difference]: Finished difference Result 45236 states and 51527 transitions. [2021-12-17 03:31:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 225 [2021-12-17 03:31:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:39,071 INFO L225 Difference]: With dead ends: 45236 [2021-12-17 03:31:39,072 INFO L226 Difference]: Without dead ends: 24860 [2021-12-17 03:31:39,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:39,093 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 180 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:39,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 146 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24860 states. [2021-12-17 03:31:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24860 to 24851. [2021-12-17 03:31:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24851 states, 24850 states have (on average 1.1348088531187124) internal successors, (28200), 24850 states have internal predecessors, (28200), 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) [2021-12-17 03:31:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24851 states to 24851 states and 28200 transitions. [2021-12-17 03:31:39,449 INFO L78 Accepts]: Start accepts. Automaton has 24851 states and 28200 transitions. Word has length 225 [2021-12-17 03:31:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:39,450 INFO L470 AbstractCegarLoop]: Abstraction has 24851 states and 28200 transitions. [2021-12-17 03:31:39,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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) [2021-12-17 03:31:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24851 states and 28200 transitions. [2021-12-17 03:31:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-17 03:31:39,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:39,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:31:39,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 56798790, now seen corresponding path program 1 times [2021-12-17 03:31:39,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:39,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830630497] [2021-12-17 03:31:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:39,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830630497] [2021-12-17 03:31:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830630497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529336257] [2021-12-17 03:31:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:39,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:39,536 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) [2021-12-17 03:31:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:31:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 03:31:40,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529336257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:40,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:40,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:31:40,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205801445] [2021-12-17 03:31:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:40,072 INFO L87 Difference]: Start difference. First operand 24851 states and 28200 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-12-17 03:31:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:40,808 INFO L93 Difference]: Finished difference Result 59074 states and 67503 transitions. [2021-12-17 03:31:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 233 [2021-12-17 03:31:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:40,845 INFO L225 Difference]: With dead ends: 59074 [2021-12-17 03:31:40,845 INFO L226 Difference]: Without dead ends: 35243 [2021-12-17 03:31:40,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:40,863 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 84 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:40,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 100 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35243 states. [2021-12-17 03:31:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35243 to 31568. [2021-12-17 03:31:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31568 states, 31567 states have (on average 1.1326701935565622) internal successors, (35755), 31567 states have internal predecessors, (35755), 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) [2021-12-17 03:31:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31568 states to 31568 states and 35755 transitions. [2021-12-17 03:31:41,262 INFO L78 Accepts]: Start accepts. Automaton has 31568 states and 35755 transitions. Word has length 233 [2021-12-17 03:31:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:41,263 INFO L470 AbstractCegarLoop]: Abstraction has 31568 states and 35755 transitions. [2021-12-17 03:31:41,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-12-17 03:31:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31568 states and 35755 transitions. [2021-12-17 03:31:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-17 03:31:41,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:41,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:41,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:41,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:41,512 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1368992567, now seen corresponding path program 1 times [2021-12-17 03:31:41,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753303230] [2021-12-17 03:31:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:41,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 03:31:41,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:41,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753303230] [2021-12-17 03:31:41,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753303230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:41,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:41,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:41,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534339101] [2021-12-17 03:31:41,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:41,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:41,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:41,558 INFO L87 Difference]: Start difference. First operand 31568 states and 35755 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-17 03:31:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:42,295 INFO L93 Difference]: Finished difference Result 74525 states and 84804 transitions. [2021-12-17 03:31:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 234 [2021-12-17 03:31:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:42,346 INFO L225 Difference]: With dead ends: 74525 [2021-12-17 03:31:42,346 INFO L226 Difference]: Without dead ends: 43570 [2021-12-17 03:31:42,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:42,367 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 231 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:42,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 143 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43570 states. [2021-12-17 03:31:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43570 to 41530. [2021-12-17 03:31:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.127934696236365) internal successors, (46842), 41529 states have internal predecessors, (46842), 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) [2021-12-17 03:31:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46842 transitions. [2021-12-17 03:31:42,943 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46842 transitions. Word has length 234 [2021-12-17 03:31:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:42,943 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46842 transitions. [2021-12-17 03:31:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-17 03:31:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46842 transitions. [2021-12-17 03:31:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-17 03:31:42,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:42,959 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:42,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:31:42,960 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash -147714927, now seen corresponding path program 1 times [2021-12-17 03:31:42,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579832588] [2021-12-17 03:31:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:42,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:31:43,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579832588] [2021-12-17 03:31:43,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579832588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154472390] [2021-12-17 03:31:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:43,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:43,052 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) [2021-12-17 03:31:43,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:31:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 03:31:43,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154472390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:43,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:43,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:31:43,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061808181] [2021-12-17 03:31:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:43,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:43,502 INFO L87 Difference]: Start difference. First operand 41530 states and 46842 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-12-17 03:31:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:44,254 INFO L93 Difference]: Finished difference Result 82859 states and 93472 transitions. [2021-12-17 03:31:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 245 [2021-12-17 03:31:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:44,300 INFO L225 Difference]: With dead ends: 82859 [2021-12-17 03:31:44,301 INFO L226 Difference]: Without dead ends: 41534 [2021-12-17 03:31:44,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:44,325 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 215 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:44,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41534 states. [2021-12-17 03:31:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41534 to 41530. [2021-12-17 03:31:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.1131980062125262) internal successors, (46230), 41529 states have internal predecessors, (46230), 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) [2021-12-17 03:31:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46230 transitions. [2021-12-17 03:31:44,785 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46230 transitions. Word has length 245 [2021-12-17 03:31:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46230 transitions. [2021-12-17 03:31:44,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-12-17 03:31:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46230 transitions. [2021-12-17 03:31:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-17 03:31:44,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:44,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:44,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:45,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash -582406873, now seen corresponding path program 1 times [2021-12-17 03:31:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:45,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043744368] [2021-12-17 03:31:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:45,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 03:31:45,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043744368] [2021-12-17 03:31:45,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043744368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:45,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:45,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:45,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900845656] [2021-12-17 03:31:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:45,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:45,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:45,178 INFO L87 Difference]: Start difference. First operand 41530 states and 46230 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-17 03:31:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:45,791 INFO L93 Difference]: Finished difference Result 82855 states and 92240 transitions. [2021-12-17 03:31:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 252 [2021-12-17 03:31:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:45,837 INFO L225 Difference]: With dead ends: 82855 [2021-12-17 03:31:45,838 INFO L226 Difference]: Without dead ends: 41530 [2021-12-17 03:31:45,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:45,865 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:45,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 158 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:31:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41530 states. [2021-12-17 03:31:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41530 to 41530. [2021-12-17 03:31:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41530 states, 41529 states have (on average 1.1131739266536638) internal successors, (46229), 41529 states have internal predecessors, (46229), 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) [2021-12-17 03:31:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41530 states to 41530 states and 46229 transitions. [2021-12-17 03:31:46,452 INFO L78 Accepts]: Start accepts. Automaton has 41530 states and 46229 transitions. Word has length 252 [2021-12-17 03:31:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:46,453 INFO L470 AbstractCegarLoop]: Abstraction has 41530 states and 46229 transitions. [2021-12-17 03:31:46,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-17 03:31:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 41530 states and 46229 transitions. [2021-12-17 03:31:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 03:31:46,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:46,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:46,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:31:46,464 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 970509609, now seen corresponding path program 1 times [2021-12-17 03:31:46,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394469883] [2021-12-17 03:31:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:46,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:31:46,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394469883] [2021-12-17 03:31:46,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394469883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:46,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:46,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:46,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293578271] [2021-12-17 03:31:46,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:46,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:46,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:46,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:46,650 INFO L87 Difference]: Start difference. First operand 41530 states and 46229 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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) [2021-12-17 03:31:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:47,294 INFO L93 Difference]: Finished difference Result 86124 states and 95920 transitions. [2021-12-17 03:31:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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 258 [2021-12-17 03:31:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:47,338 INFO L225 Difference]: With dead ends: 86124 [2021-12-17 03:31:47,338 INFO L226 Difference]: Without dead ends: 44799 [2021-12-17 03:31:47,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:47,367 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:47,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 163 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44799 states. [2021-12-17 03:31:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44799 to 42958. [2021-12-17 03:31:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42958 states, 42957 states have (on average 1.1159066042786974) internal successors, (47936), 42957 states have internal predecessors, (47936), 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) [2021-12-17 03:31:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42958 states to 42958 states and 47936 transitions. [2021-12-17 03:31:47,834 INFO L78 Accepts]: Start accepts. Automaton has 42958 states and 47936 transitions. Word has length 258 [2021-12-17 03:31:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:47,835 INFO L470 AbstractCegarLoop]: Abstraction has 42958 states and 47936 transitions. [2021-12-17 03:31:47,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 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) [2021-12-17 03:31:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42958 states and 47936 transitions. [2021-12-17 03:31:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-17 03:31:47,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:47,844 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:47,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:31:47,845 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash -340205230, now seen corresponding path program 1 times [2021-12-17 03:31:47,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858735400] [2021-12-17 03:31:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:47,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 03:31:47,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858735400] [2021-12-17 03:31:47,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858735400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709291038] [2021-12-17 03:31:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:47,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:47,925 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) [2021-12-17 03:31:47,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:31:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 03:31:48,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:48,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709291038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:48,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:48,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:48,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71083146] [2021-12-17 03:31:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:48,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:48,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:48,406 INFO L87 Difference]: Start difference. First operand 42958 states and 47936 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 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) [2021-12-17 03:31:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:49,085 INFO L93 Difference]: Finished difference Result 83656 states and 93248 transitions. [2021-12-17 03:31:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 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) Word has length 259 [2021-12-17 03:31:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:49,132 INFO L225 Difference]: With dead ends: 83656 [2021-12-17 03:31:49,133 INFO L226 Difference]: Without dead ends: 41107 [2021-12-17 03:31:49,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:49,168 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 219 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:49,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 311 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41107 states. [2021-12-17 03:31:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41107 to 38460. [2021-12-17 03:31:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38460 states, 38459 states have (on average 1.0907459892352895) internal successors, (41949), 38459 states have internal predecessors, (41949), 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) [2021-12-17 03:31:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38460 states to 38460 states and 41949 transitions. [2021-12-17 03:31:49,631 INFO L78 Accepts]: Start accepts. Automaton has 38460 states and 41949 transitions. Word has length 259 [2021-12-17 03:31:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 38460 states and 41949 transitions. [2021-12-17 03:31:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 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) [2021-12-17 03:31:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 38460 states and 41949 transitions. [2021-12-17 03:31:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-17 03:31:49,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:49,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:49,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:49,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 03:31:49,852 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1138707456, now seen corresponding path program 1 times [2021-12-17 03:31:49,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571907255] [2021-12-17 03:31:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:49,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 03:31:49,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571907255] [2021-12-17 03:31:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571907255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:49,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:49,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:49,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715458341] [2021-12-17 03:31:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:49,938 INFO L87 Difference]: Start difference. First operand 38460 states and 41949 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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) [2021-12-17 03:31:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:50,788 INFO L93 Difference]: Finished difference Result 107810 states and 117682 transitions. [2021-12-17 03:31:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 280 [2021-12-17 03:31:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:50,868 INFO L225 Difference]: With dead ends: 107810 [2021-12-17 03:31:50,868 INFO L226 Difference]: Without dead ends: 69758 [2021-12-17 03:31:50,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:50,899 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 530 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:50,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 437 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69758 states. [2021-12-17 03:31:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69758 to 67720. [2021-12-17 03:31:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67720 states, 67719 states have (on average 1.0922931525864232) internal successors, (73969), 67719 states have internal predecessors, (73969), 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) [2021-12-17 03:31:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67720 states to 67720 states and 73969 transitions. [2021-12-17 03:31:51,710 INFO L78 Accepts]: Start accepts. Automaton has 67720 states and 73969 transitions. Word has length 280 [2021-12-17 03:31:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:51,711 INFO L470 AbstractCegarLoop]: Abstraction has 67720 states and 73969 transitions. [2021-12-17 03:31:51,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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) [2021-12-17 03:31:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 67720 states and 73969 transitions. [2021-12-17 03:31:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-17 03:31:51,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:51,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:51,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:31:51,725 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1138760523, now seen corresponding path program 1 times [2021-12-17 03:31:51,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:51,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474739337] [2021-12-17 03:31:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:51,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 03:31:51,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474739337] [2021-12-17 03:31:51,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474739337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461566879] [2021-12-17 03:31:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:51,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:51,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:51,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:31:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 03:31:52,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:52,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461566879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:52,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:52,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:52,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902892537] [2021-12-17 03:31:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:52,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:52,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:52,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:52,316 INFO L87 Difference]: Start difference. First operand 67720 states and 73969 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2021-12-17 03:31:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:53,225 INFO L93 Difference]: Finished difference Result 153140 states and 167545 transitions. [2021-12-17 03:31:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 299 [2021-12-17 03:31:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:53,333 INFO L225 Difference]: With dead ends: 153140 [2021-12-17 03:31:53,333 INFO L226 Difference]: Without dead ends: 86031 [2021-12-17 03:31:53,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:53,384 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:53,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 151 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86031 states. [2021-12-17 03:31:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86031 to 74626. [2021-12-17 03:31:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74626 states, 74625 states have (on average 1.095785594639866) internal successors, (81773), 74625 states have internal predecessors, (81773), 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) [2021-12-17 03:31:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74626 states to 74626 states and 81773 transitions. [2021-12-17 03:31:54,811 INFO L78 Accepts]: Start accepts. Automaton has 74626 states and 81773 transitions. Word has length 299 [2021-12-17 03:31:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 74626 states and 81773 transitions. [2021-12-17 03:31:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2021-12-17 03:31:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 74626 states and 81773 transitions. [2021-12-17 03:31:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-17 03:31:54,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:54,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:54,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:55,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:55,042 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash 54050235, now seen corresponding path program 1 times [2021-12-17 03:31:55,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:55,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069149405] [2021-12-17 03:31:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:55,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:31:55,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069149405] [2021-12-17 03:31:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069149405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:55,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382300345] [2021-12-17 03:31:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:55,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:55,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:55,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:55,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:31:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 03:31:55,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:55,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382300345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:55,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:55,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:31:55,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478989466] [2021-12-17 03:31:55,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:55,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:55,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:55,730 INFO L87 Difference]: Start difference. First operand 74626 states and 81773 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-17 03:31:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:56,543 INFO L93 Difference]: Finished difference Result 218792 states and 239888 transitions. [2021-12-17 03:31:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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 311 [2021-12-17 03:31:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:56,707 INFO L225 Difference]: With dead ends: 218792 [2021-12-17 03:31:56,708 INFO L226 Difference]: Without dead ends: 144777 [2021-12-17 03:31:56,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:56,768 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 211 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:56,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:31:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144777 states. [2021-12-17 03:31:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144777 to 144567. [2021-12-17 03:31:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144567 states, 144566 states have (on average 1.0965925597996762) internal successors, (158530), 144566 states have internal predecessors, (158530), 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) [2021-12-17 03:31:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144567 states to 144567 states and 158530 transitions. [2021-12-17 03:31:58,919 INFO L78 Accepts]: Start accepts. Automaton has 144567 states and 158530 transitions. Word has length 311 [2021-12-17 03:31:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:58,920 INFO L470 AbstractCegarLoop]: Abstraction has 144567 states and 158530 transitions. [2021-12-17 03:31:58,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-17 03:31:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 144567 states and 158530 transitions. [2021-12-17 03:31:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-17 03:31:58,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:58,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:58,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:59,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:59,148 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -202236404, now seen corresponding path program 1 times [2021-12-17 03:31:59,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:59,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707457205] [2021-12-17 03:31:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:59,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:31:59,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707457205] [2021-12-17 03:31:59,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707457205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:59,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:59,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:59,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511838302] [2021-12-17 03:31:59,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:59,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:59,255 INFO L87 Difference]: Start difference. First operand 144567 states and 158530 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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) [2021-12-17 03:32:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:00,585 INFO L93 Difference]: Finished difference Result 288523 states and 316407 transitions. [2021-12-17 03:32:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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 322 [2021-12-17 03:32:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:00,750 INFO L225 Difference]: With dead ends: 288523 [2021-12-17 03:32:00,751 INFO L226 Difference]: Without dead ends: 144567 [2021-12-17 03:32:00,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:00,833 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 67 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:00,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144567 states. [2021-12-17 03:32:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144567 to 144567. [2021-12-17 03:32:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144567 states, 144566 states have (on average 1.09658564254389) internal successors, (158529), 144566 states have internal predecessors, (158529), 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) [2021-12-17 03:32:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144567 states to 144567 states and 158529 transitions. [2021-12-17 03:32:02,688 INFO L78 Accepts]: Start accepts. Automaton has 144567 states and 158529 transitions. Word has length 322 [2021-12-17 03:32:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:02,689 INFO L470 AbstractCegarLoop]: Abstraction has 144567 states and 158529 transitions. [2021-12-17 03:32:02,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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) [2021-12-17 03:32:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 144567 states and 158529 transitions. [2021-12-17 03:32:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-17 03:32:02,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:02,702 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:02,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:32:02,702 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1370838433, now seen corresponding path program 1 times [2021-12-17 03:32:02,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5048596] [2021-12-17 03:32:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:02,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-17 03:32:02,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:02,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5048596] [2021-12-17 03:32:02,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5048596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:02,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822741492] [2021-12-17 03:32:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:02,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:02,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:02,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:02,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:32:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:32:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-17 03:32:04,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:04,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822741492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:04,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:04,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:32:04,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761174698] [2021-12-17 03:32:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:04,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:32:04,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:32:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:04,055 INFO L87 Difference]: Start difference. First operand 144567 states and 158529 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-17 03:32:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:05,950 INFO L93 Difference]: Finished difference Result 379386 states and 415528 transitions. [2021-12-17 03:32:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:32:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 328 [2021-12-17 03:32:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:06,358 INFO L225 Difference]: With dead ends: 379386 [2021-12-17 03:32:06,359 INFO L226 Difference]: Without dead ends: 235430 [2021-12-17 03:32:06,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:06,447 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 515 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:06,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 316 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235430 states. [2021-12-17 03:32:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235430 to 235012. [2021-12-17 03:32:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235012 states, 235011 states have (on average 1.0936296598882604) internal successors, (257015), 235011 states have internal predecessors, (257015), 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) [2021-12-17 03:32:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235012 states to 235012 states and 257015 transitions. [2021-12-17 03:32:10,335 INFO L78 Accepts]: Start accepts. Automaton has 235012 states and 257015 transitions. Word has length 328 [2021-12-17 03:32:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:10,335 INFO L470 AbstractCegarLoop]: Abstraction has 235012 states and 257015 transitions. [2021-12-17 03:32:10,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-17 03:32:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 235012 states and 257015 transitions. [2021-12-17 03:32:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-17 03:32:10,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:10,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:10,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 03:32:10,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -374825101, now seen corresponding path program 1 times [2021-12-17 03:32:10,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:10,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438228262] [2021-12-17 03:32:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:10,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:32:10,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438228262] [2021-12-17 03:32:10,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438228262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:10,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:10,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:10,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143186458] [2021-12-17 03:32:10,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:10,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:32:10,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:32:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:32:10,670 INFO L87 Difference]: Start difference. First operand 235012 states and 257015 transitions. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-12-17 03:32:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:12,454 INFO L93 Difference]: Finished difference Result 469616 states and 513584 transitions. [2021-12-17 03:32:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:32:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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 328 [2021-12-17 03:32:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:12,797 INFO L225 Difference]: With dead ends: 469616 [2021-12-17 03:32:12,798 INFO L226 Difference]: Without dead ends: 235215 [2021-12-17 03:32:12,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:32:12,913 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 350 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:12,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 53 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235215 states. [2021-12-17 03:32:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235215 to 229937. [2021-12-17 03:32:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229937 states, 229936 states have (on average 1.0906948020318696) internal successors, (250790), 229936 states have internal predecessors, (250790), 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) [2021-12-17 03:32:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229937 states to 229937 states and 250790 transitions. [2021-12-17 03:32:17,230 INFO L78 Accepts]: Start accepts. Automaton has 229937 states and 250790 transitions. Word has length 328 [2021-12-17 03:32:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:17,230 INFO L470 AbstractCegarLoop]: Abstraction has 229937 states and 250790 transitions. [2021-12-17 03:32:17,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-12-17 03:32:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 229937 states and 250790 transitions. [2021-12-17 03:32:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-17 03:32:17,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:17,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:32:17,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash 495054327, now seen corresponding path program 1 times [2021-12-17 03:32:17,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793510968] [2021-12-17 03:32:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:17,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:32:17,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793510968] [2021-12-17 03:32:17,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793510968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625786157] [2021-12-17 03:32:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:17,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:17,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:17,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:17,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:32:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:32:17,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 03:32:18,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:18,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625786157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:18,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:18,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:32:18,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961117473] [2021-12-17 03:32:18,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:18,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:18,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:18,298 INFO L87 Difference]: Start difference. First operand 229937 states and 250790 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2021-12-17 03:32:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:20,088 INFO L93 Difference]: Finished difference Result 468030 states and 510785 transitions. [2021-12-17 03:32:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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 329 [2021-12-17 03:32:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:20,463 INFO L225 Difference]: With dead ends: 468030 [2021-12-17 03:32:20,464 INFO L226 Difference]: Without dead ends: 238704 [2021-12-17 03:32:20,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:20,615 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:20,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 352 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238704 states. [2021-12-17 03:32:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238704 to 235840. [2021-12-17 03:32:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235840 states, 235839 states have (on average 1.088034633796785) internal successors, (256601), 235839 states have internal predecessors, (256601), 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) [2021-12-17 03:32:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235840 states to 235840 states and 256601 transitions. [2021-12-17 03:32:24,125 INFO L78 Accepts]: Start accepts. Automaton has 235840 states and 256601 transitions. Word has length 329 [2021-12-17 03:32:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:24,126 INFO L470 AbstractCegarLoop]: Abstraction has 235840 states and 256601 transitions. [2021-12-17 03:32:24,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2021-12-17 03:32:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 235840 states and 256601 transitions. [2021-12-17 03:32:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-17 03:32:24,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:24,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:24,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 03:32:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 03:32:24,356 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1365008856, now seen corresponding path program 1 times [2021-12-17 03:32:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:24,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600951610] [2021-12-17 03:32:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:24,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 170 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:32:24,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600951610] [2021-12-17 03:32:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600951610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303012147] [2021-12-17 03:32:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:24,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:24,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:24,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 03:32:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:32:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 03:32:25,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303012147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:25,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 03:32:25,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398058751] [2021-12-17 03:32:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:25,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:25,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:25,241 INFO L87 Difference]: Start difference. First operand 235840 states and 256601 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2021-12-17 03:32:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:27,442 INFO L93 Difference]: Finished difference Result 468651 states and 510015 transitions. [2021-12-17 03:32:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 330 [2021-12-17 03:32:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:27,766 INFO L225 Difference]: With dead ends: 468651 [2021-12-17 03:32:27,766 INFO L226 Difference]: Without dead ends: 233422 [2021-12-17 03:32:27,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:27,896 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 93 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:27,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 286 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233422 states.