./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem11_label48.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 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:14:41,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:14:41,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:14:41,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:14:41,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:14:41,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:14:41,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:14:41,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:14:41,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:14:41,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:14:41,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:14:41,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:14:41,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:14:41,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:14:41,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:14:41,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:14:41,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:14:41,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:14:41,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:14:41,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:14:41,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:14:41,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:14:41,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:14:41,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:14:41,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:14:41,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:14:41,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:14:41,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:14:41,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:14:41,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:14:41,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:14:41,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:14:41,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:14:41,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:14:41,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:14:41,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:14:41,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:14:41,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:14:41,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:14:41,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:14:41,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:14:41,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:14:41,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:14:41,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:14:41,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:14:41,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:14:41,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:14:41,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:14:41,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:14:41,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:14:41,422 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:14:41,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:14:41,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:14:41,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:14:41,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:14:41,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:14:41,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:14:41,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:14:41,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:14:41,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:14:41,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 [2021-12-22 09:14:41,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:14:41,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:14:41,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:14:41,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:14:41,608 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:14:41,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2021-12-22 09:14:41,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ed1d2db/b27b94ba70a5426b83b1907eaadba827/FLAG081af8d83 [2021-12-22 09:14:42,101 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:14:42,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2021-12-22 09:14:42,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ed1d2db/b27b94ba70a5426b83b1907eaadba827/FLAG081af8d83 [2021-12-22 09:14:42,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ed1d2db/b27b94ba70a5426b83b1907eaadba827 [2021-12-22 09:14:42,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:14:42,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:14:42,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:14:42,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:14:42,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:14:42,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:14:42" (1/1) ... [2021-12-22 09:14:42,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726f857b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:42, skipping insertion in model container [2021-12-22 09:14:42,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:14:42" (1/1) ... [2021-12-22 09:14:42,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:14:42,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:14:42,630 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/Problem11_label48.c[7294,7307] [2021-12-22 09:14:42,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:14:42,812 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:14:42,845 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/Problem11_label48.c[7294,7307] [2021-12-22 09:14:42,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:14:43,004 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:14:43,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43 WrapperNode [2021-12-22 09:14:43,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:14:43,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:14:43,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:14:43,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:14:43,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,109 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-22 09:14:43,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:14:43,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:14:43,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:14:43,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:14:43,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:14:43,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:14:43,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:14:43,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:14:43,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (1/1) ... [2021-12-22 09:14:43,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:14:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:14:43,245 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) [2021-12-22 09:14:43,247 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 [2021-12-22 09:14:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:14:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:14:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:14:43,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:14:43,322 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:14:43,323 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:14:44,435 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:14:44,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:14:44,447 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:14:44,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:14:44 BoogieIcfgContainer [2021-12-22 09:14:44,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:14:44,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:14:44,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:14:44,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:14:44,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:14:42" (1/3) ... [2021-12-22 09:14:44,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fb9a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:14:44, skipping insertion in model container [2021-12-22 09:14:44,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:43" (2/3) ... [2021-12-22 09:14:44,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fb9a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:14:44, skipping insertion in model container [2021-12-22 09:14:44,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:14:44" (3/3) ... [2021-12-22 09:14:44,456 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label48.c [2021-12-22 09:14:44,461 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:14:44,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:14:44,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:14:44,507 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 [2021-12-22 09:14:44,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:14:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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) [2021-12-22 09:14:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 09:14:44,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:44,539 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] [2021-12-22 09:14:44,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-12-22 09:14:44,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:44,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376216633] [2021-12-22 09:14:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:44,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:44,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376216633] [2021-12-22 09:14:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376216633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:44,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:44,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:14:44,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729311719] [2021-12-22 09:14:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:44,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:44,803 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2021-12-22 09:14:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:45,587 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2021-12-22 09:14:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2021-12-22 09:14:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:45,598 INFO L225 Difference]: With dead ends: 769 [2021-12-22 09:14:45,598 INFO L226 Difference]: Without dead ends: 422 [2021-12-22 09:14:45,602 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 [2021-12-22 09:14:45,604 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:45,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:14:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-22 09:14:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-12-22 09:14:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 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) [2021-12-22 09:14:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2021-12-22 09:14:45,652 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 50 [2021-12-22 09:14:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2021-12-22 09:14:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2021-12-22 09:14:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2021-12-22 09:14:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 09:14:45,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:45,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:14:45,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:14:45,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1807266807, now seen corresponding path program 1 times [2021-12-22 09:14:45,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587251196] [2021-12-22 09:14:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:45,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:45,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:45,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587251196] [2021-12-22 09:14:45,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587251196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:45,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:45,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:14:45,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494028037] [2021-12-22 09:14:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:45,756 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2021-12-22 09:14:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:46,313 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2021-12-22 09:14:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-22 09:14:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:46,318 INFO L225 Difference]: With dead ends: 1194 [2021-12-22 09:14:46,318 INFO L226 Difference]: Without dead ends: 784 [2021-12-22 09:14:46,319 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 [2021-12-22 09:14:46,320 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:46,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:14:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-22 09:14:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-12-22 09:14:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 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) [2021-12-22 09:14:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2021-12-22 09:14:46,351 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 116 [2021-12-22 09:14:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:46,352 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2021-12-22 09:14:46,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2021-12-22 09:14:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2021-12-22 09:14:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 09:14:46,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:46,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:14:46,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:14:46,355 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -66853459, now seen corresponding path program 1 times [2021-12-22 09:14:46,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:46,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655347251] [2021-12-22 09:14:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:46,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:46,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655347251] [2021-12-22 09:14:46,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655347251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:46,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:46,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:14:46,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556452980] [2021-12-22 09:14:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:46,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:46,440 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2021-12-22 09:14:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:47,013 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2021-12-22 09:14:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 120 [2021-12-22 09:14:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:47,020 INFO L225 Difference]: With dead ends: 1936 [2021-12-22 09:14:47,021 INFO L226 Difference]: Without dead ends: 1154 [2021-12-22 09:14:47,022 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 [2021-12-22 09:14:47,023 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:47,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:14:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-22 09:14:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2021-12-22 09:14:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 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) [2021-12-22 09:14:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2021-12-22 09:14:47,046 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 120 [2021-12-22 09:14:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:47,047 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2021-12-22 09:14:47,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2021-12-22 09:14:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2021-12-22 09:14:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 09:14:47,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:47,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:14:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:14:47,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2125699946, now seen corresponding path program 1 times [2021-12-22 09:14:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308032802] [2021-12-22 09:14:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:47,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:47,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308032802] [2021-12-22 09:14:47,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308032802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:47,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:47,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:47,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010749094] [2021-12-22 09:14:47,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:47,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:47,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:47,121 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-22 09:14:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:47,743 INFO L93 Difference]: Finished difference Result 2679 states and 3481 transitions. [2021-12-22 09:14:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 162 [2021-12-22 09:14:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:47,748 INFO L225 Difference]: With dead ends: 2679 [2021-12-22 09:14:47,748 INFO L226 Difference]: Without dead ends: 1712 [2021-12-22 09:14:47,749 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 [2021-12-22 09:14:47,750 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 156 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:47,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 332 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:14:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-22 09:14:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1521. [2021-12-22 09:14:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.255921052631579) internal successors, (1909), 1520 states have internal predecessors, (1909), 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) [2021-12-22 09:14:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1909 transitions. [2021-12-22 09:14:47,769 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1909 transitions. Word has length 162 [2021-12-22 09:14:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:47,770 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1909 transitions. [2021-12-22 09:14:47,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-22 09:14:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1909 transitions. [2021-12-22 09:14:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-22 09:14:47,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:47,774 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:14:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:14:47,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1101521033, now seen corresponding path program 1 times [2021-12-22 09:14:47,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:47,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7810627] [2021-12-22 09:14:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:47,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 09:14:47,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7810627] [2021-12-22 09:14:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7810627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:47,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:47,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:47,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103322714] [2021-12-22 09:14:47,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:47,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:47,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:47,885 INFO L87 Difference]: Start difference. First operand 1521 states and 1909 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-12-22 09:14:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:48,577 INFO L93 Difference]: Finished difference Result 3597 states and 4559 transitions. [2021-12-22 09:14:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:48,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 232 [2021-12-22 09:14:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:48,583 INFO L225 Difference]: With dead ends: 3597 [2021-12-22 09:14:48,583 INFO L226 Difference]: Without dead ends: 2078 [2021-12-22 09:14:48,585 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 [2021-12-22 09:14:48,586 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 147 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:48,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 391 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:14:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-12-22 09:14:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1889. [2021-12-22 09:14:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 1.2473516949152543) internal successors, (2355), 1888 states have internal predecessors, (2355), 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) [2021-12-22 09:14:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2355 transitions. [2021-12-22 09:14:48,609 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2355 transitions. Word has length 232 [2021-12-22 09:14:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:48,610 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 2355 transitions. [2021-12-22 09:14:48,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-12-22 09:14:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2355 transitions. [2021-12-22 09:14:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-22 09:14:48,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:48,613 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, 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, 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] [2021-12-22 09:14:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:14:48,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 697992722, now seen corresponding path program 1 times [2021-12-22 09:14:48,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:48,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660247178] [2021-12-22 09:14:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:48,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:48,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660247178] [2021-12-22 09:14:48,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660247178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:48,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:48,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:48,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924268486] [2021-12-22 09:14:48,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:48,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:48,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:48,725 INFO L87 Difference]: Start difference. First operand 1889 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-22 09:14:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:49,396 INFO L93 Difference]: Finished difference Result 5077 states and 6327 transitions. [2021-12-22 09:14:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 [2021-12-22 09:14:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:49,405 INFO L225 Difference]: With dead ends: 5077 [2021-12-22 09:14:49,405 INFO L226 Difference]: Without dead ends: 3190 [2021-12-22 09:14:49,407 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 [2021-12-22 09:14:49,408 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 123 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:49,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 141 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:14:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-12-22 09:14:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3186. [2021-12-22 09:14:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 1.2160125588697017) internal successors, (3873), 3185 states have internal predecessors, (3873), 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) [2021-12-22 09:14:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3873 transitions. [2021-12-22 09:14:49,445 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3873 transitions. Word has length 259 [2021-12-22 09:14:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:49,445 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 3873 transitions. [2021-12-22 09:14:49,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-22 09:14:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3873 transitions. [2021-12-22 09:14:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-22 09:14:49,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:49,448 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, 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] [2021-12-22 09:14:49,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:14:49,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 387212821, now seen corresponding path program 1 times [2021-12-22 09:14:49,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070353177] [2021-12-22 09:14:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:49,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-22 09:14:49,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070353177] [2021-12-22 09:14:49,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070353177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:49,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:49,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:49,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354883979] [2021-12-22 09:14:49,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:49,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:49,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:49,557 INFO L87 Difference]: Start difference. First operand 3186 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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) [2021-12-22 09:14:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:50,179 INFO L93 Difference]: Finished difference Result 8220 states and 9834 transitions. [2021-12-22 09:14:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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 265 [2021-12-22 09:14:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:50,191 INFO L225 Difference]: With dead ends: 8220 [2021-12-22 09:14:50,191 INFO L226 Difference]: Without dead ends: 5036 [2021-12-22 09:14:50,194 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 [2021-12-22 09:14:50,196 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 171 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:50,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 392 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:14:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-12-22 09:14:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 5035. [2021-12-22 09:14:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 1.1835518474374256) internal successors, (5958), 5034 states have internal predecessors, (5958), 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) [2021-12-22 09:14:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 5958 transitions. [2021-12-22 09:14:50,254 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 5958 transitions. Word has length 265 [2021-12-22 09:14:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:50,255 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 5958 transitions. [2021-12-22 09:14:50,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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) [2021-12-22 09:14:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 5958 transitions. [2021-12-22 09:14:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-22 09:14:50,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:50,258 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, 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, 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] [2021-12-22 09:14:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:14:50,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -914056920, now seen corresponding path program 1 times [2021-12-22 09:14:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:50,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972845689] [2021-12-22 09:14:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:50,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:50,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972845689] [2021-12-22 09:14:50,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972845689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:14:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847686008] [2021-12-22 09:14:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:50,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:14:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:14:50,488 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) [2021-12-22 09:14:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:14:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:14:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:14:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 09:14:51,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:14:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847686008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:51,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:14:51,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:14:51,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93389338] [2021-12-22 09:14:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:51,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:14:51,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:14:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:14:51,144 INFO L87 Difference]: Start difference. First operand 5035 states and 5958 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-12-22 09:14:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:52,181 INFO L93 Difference]: Finished difference Result 13958 states and 16430 transitions. [2021-12-22 09:14:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:14:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 268 [2021-12-22 09:14:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:52,209 INFO L225 Difference]: With dead ends: 13958 [2021-12-22 09:14:52,209 INFO L226 Difference]: Without dead ends: 9293 [2021-12-22 09:14:52,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:14:52,216 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 274 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:52,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 192 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:14:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-12-22 09:14:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 4667. [2021-12-22 09:14:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 1.1941705957994) internal successors, (5572), 4666 states have internal predecessors, (5572), 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) [2021-12-22 09:14:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 5572 transitions. [2021-12-22 09:14:52,290 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 5572 transitions. Word has length 268 [2021-12-22 09:14:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:52,290 INFO L470 AbstractCegarLoop]: Abstraction has 4667 states and 5572 transitions. [2021-12-22 09:14:52,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-12-22 09:14:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 5572 transitions. [2021-12-22 09:14:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-22 09:14:52,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:52,294 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, 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, 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] [2021-12-22 09:14:52,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:14:52,511 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 [2021-12-22 09:14:52,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 448170155, now seen corresponding path program 1 times [2021-12-22 09:14:52,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021713102] [2021-12-22 09:14:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:52,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:52,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:52,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021713102] [2021-12-22 09:14:52,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021713102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:52,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:52,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:14:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35897171] [2021-12-22 09:14:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:14:52,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:14:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:14:52,625 INFO L87 Difference]: Start difference. First operand 4667 states and 5572 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2021-12-22 09:14:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:54,150 INFO L93 Difference]: Finished difference Result 15972 states and 19215 transitions. [2021-12-22 09:14:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:14:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 269 [2021-12-22 09:14:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:54,197 INFO L225 Difference]: With dead ends: 15972 [2021-12-22 09:14:54,201 INFO L226 Difference]: Without dead ends: 11307 [2021-12-22 09:14:54,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:14:54,221 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 376 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:54,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 152 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:14:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11307 states. [2021-12-22 09:14:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11307 to 10930. [2021-12-22 09:14:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10930 states, 10929 states have (on average 1.1707384024155916) internal successors, (12795), 10929 states have internal predecessors, (12795), 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) [2021-12-22 09:14:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10930 states to 10930 states and 12795 transitions. [2021-12-22 09:14:54,459 INFO L78 Accepts]: Start accepts. Automaton has 10930 states and 12795 transitions. Word has length 269 [2021-12-22 09:14:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:54,460 INFO L470 AbstractCegarLoop]: Abstraction has 10930 states and 12795 transitions. [2021-12-22 09:14:54,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2021-12-22 09:14:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 10930 states and 12795 transitions. [2021-12-22 09:14:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-22 09:14:54,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:54,464 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, 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, 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] [2021-12-22 09:14:54,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:14:54,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash 510762410, now seen corresponding path program 1 times [2021-12-22 09:14:54,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:54,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862460005] [2021-12-22 09:14:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:54,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 09:14:54,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862460005] [2021-12-22 09:14:54,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862460005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:54,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:54,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:54,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426481538] [2021-12-22 09:14:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:54,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:54,555 INFO L87 Difference]: Start difference. First operand 10930 states and 12795 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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) [2021-12-22 09:14:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:55,117 INFO L93 Difference]: Finished difference Result 21488 states and 25200 transitions. [2021-12-22 09:14:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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 280 [2021-12-22 09:14:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:55,131 INFO L225 Difference]: With dead ends: 21488 [2021-12-22 09:14:55,132 INFO L226 Difference]: Without dead ends: 10928 [2021-12-22 09:14:55,140 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 [2021-12-22 09:14:55,141 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 185 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:55,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 304 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:14:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-12-22 09:14:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 10744. [2021-12-22 09:14:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 1.141952899562506) internal successors, (12268), 10743 states have internal predecessors, (12268), 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) [2021-12-22 09:14:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 12268 transitions. [2021-12-22 09:14:55,306 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 12268 transitions. Word has length 280 [2021-12-22 09:14:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:55,307 INFO L470 AbstractCegarLoop]: Abstraction has 10744 states and 12268 transitions. [2021-12-22 09:14:55,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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) [2021-12-22 09:14:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 12268 transitions. [2021-12-22 09:14:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-22 09:14:55,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:55,312 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, 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, 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] [2021-12-22 09:14:55,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:14:55,313 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash 577294273, now seen corresponding path program 1 times [2021-12-22 09:14:55,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102639517] [2021-12-22 09:14:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:55,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:55,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102639517] [2021-12-22 09:14:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102639517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:14:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416021960] [2021-12-22 09:14:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:55,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:14:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:14:55,437 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) [2021-12-22 09:14:55,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:14:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:55,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:14:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:14:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:56,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:14:56,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416021960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:56,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:14:56,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:14:56,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592777910] [2021-12-22 09:14:56,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:56,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:56,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:14:56,168 INFO L87 Difference]: Start difference. First operand 10744 states and 12268 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) [2021-12-22 09:14:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:56,750 INFO L93 Difference]: Finished difference Result 22426 states and 25761 transitions. [2021-12-22 09:14:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:14:56,751 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 283 [2021-12-22 09:14:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:56,766 INFO L225 Difference]: With dead ends: 22426 [2021-12-22 09:14:56,767 INFO L226 Difference]: Without dead ends: 12052 [2021-12-22 09:14:56,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:14:56,775 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 99 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:56,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 342 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:14:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2021-12-22 09:14:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12043. [2021-12-22 09:14:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 1.143996013951171) internal successors, (13776), 12042 states have internal predecessors, (13776), 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) [2021-12-22 09:14:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 13776 transitions. [2021-12-22 09:14:56,913 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 13776 transitions. Word has length 283 [2021-12-22 09:14:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:56,914 INFO L470 AbstractCegarLoop]: Abstraction has 12043 states and 13776 transitions. [2021-12-22 09:14:56,914 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) [2021-12-22 09:14:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 13776 transitions. [2021-12-22 09:14:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-12-22 09:14:56,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:56,919 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, 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, 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] [2021-12-22 09:14:56,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:14:57,138 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,SelfDestructingSolverStorable10 [2021-12-22 09:14:57,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1277495970, now seen corresponding path program 1 times [2021-12-22 09:14:57,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041649013] [2021-12-22 09:14:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:57,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:57,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041649013] [2021-12-22 09:14:57,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041649013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:57,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:57,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:14:57,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493229861] [2021-12-22 09:14:57,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:57,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:14:57,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:14:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:14:57,254 INFO L87 Difference]: Start difference. First operand 12043 states and 13776 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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) [2021-12-22 09:14:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:58,237 INFO L93 Difference]: Finished difference Result 26298 states and 30094 transitions. [2021-12-22 09:14:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:14:58,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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 286 [2021-12-22 09:14:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:58,257 INFO L225 Difference]: With dead ends: 26298 [2021-12-22 09:14:58,257 INFO L226 Difference]: Without dead ends: 14625 [2021-12-22 09:14:58,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:14:58,266 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 267 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:58,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:14:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14625 states. [2021-12-22 09:14:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14625 to 14619. [2021-12-22 09:14:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 1.1313449172253387) internal successors, (16538), 14618 states have internal predecessors, (16538), 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) [2021-12-22 09:14:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 16538 transitions. [2021-12-22 09:14:58,468 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 16538 transitions. Word has length 286 [2021-12-22 09:14:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:58,468 INFO L470 AbstractCegarLoop]: Abstraction has 14619 states and 16538 transitions. [2021-12-22 09:14:58,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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) [2021-12-22 09:14:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 16538 transitions. [2021-12-22 09:14:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-22 09:14:58,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:58,474 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, 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, 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] [2021-12-22 09:14:58,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:14:58,474 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1227652913, now seen corresponding path program 1 times [2021-12-22 09:14:58,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:58,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743458245] [2021-12-22 09:14:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:58,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:14:58,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743458245] [2021-12-22 09:14:58,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743458245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:58,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:58,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:14:58,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388447367] [2021-12-22 09:14:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:58,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:14:58,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:14:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:14:58,578 INFO L87 Difference]: Start difference. First operand 14619 states and 16538 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2021-12-22 09:14:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:14:59,618 INFO L93 Difference]: Finished difference Result 30912 states and 35030 transitions. [2021-12-22 09:14:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:14:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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 288 [2021-12-22 09:14:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:14:59,636 INFO L225 Difference]: With dead ends: 30912 [2021-12-22 09:14:59,636 INFO L226 Difference]: Without dead ends: 16663 [2021-12-22 09:14:59,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:14:59,647 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 252 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:14:59,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 178 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:14:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16663 states. [2021-12-22 09:14:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16663 to 15550. [2021-12-22 09:14:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15550 states, 15549 states have (on average 1.1291401376294294) internal successors, (17557), 15549 states have internal predecessors, (17557), 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) [2021-12-22 09:14:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15550 states to 15550 states and 17557 transitions. [2021-12-22 09:14:59,779 INFO L78 Accepts]: Start accepts. Automaton has 15550 states and 17557 transitions. Word has length 288 [2021-12-22 09:14:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:14:59,779 INFO L470 AbstractCegarLoop]: Abstraction has 15550 states and 17557 transitions. [2021-12-22 09:14:59,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2021-12-22 09:14:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15550 states and 17557 transitions. [2021-12-22 09:14:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-22 09:14:59,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:14:59,785 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:14:59,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:14:59,785 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:14:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:14:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 100748151, now seen corresponding path program 1 times [2021-12-22 09:14:59,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:14:59,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533904368] [2021-12-22 09:14:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:14:59,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:14:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:14:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-22 09:14:59,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:14:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533904368] [2021-12-22 09:14:59,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533904368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:14:59,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:14:59,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:14:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837409412] [2021-12-22 09:14:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:14:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:14:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:14:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:14:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:14:59,950 INFO L87 Difference]: Start difference. First operand 15550 states and 17557 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2021-12-22 09:15:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:00,634 INFO L93 Difference]: Finished difference Result 33857 states and 38353 transitions. [2021-12-22 09:15:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 312 [2021-12-22 09:15:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:00,654 INFO L225 Difference]: With dead ends: 33857 [2021-12-22 09:15:00,654 INFO L226 Difference]: Without dead ends: 18677 [2021-12-22 09:15:00,664 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 [2021-12-22 09:15:00,665 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 152 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:00,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 357 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:15:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18677 states. [2021-12-22 09:15:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18677 to 17573. [2021-12-22 09:15:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17573 states, 17572 states have (on average 1.1226951969041656) internal successors, (19728), 17572 states have internal predecessors, (19728), 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) [2021-12-22 09:15:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17573 states to 17573 states and 19728 transitions. [2021-12-22 09:15:00,850 INFO L78 Accepts]: Start accepts. Automaton has 17573 states and 19728 transitions. Word has length 312 [2021-12-22 09:15:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:00,850 INFO L470 AbstractCegarLoop]: Abstraction has 17573 states and 19728 transitions. [2021-12-22 09:15:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2021-12-22 09:15:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 17573 states and 19728 transitions. [2021-12-22 09:15:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-22 09:15:00,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:00,858 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:00,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:15:00,858 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1462001354, now seen corresponding path program 1 times [2021-12-22 09:15:00,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:00,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018360552] [2021-12-22 09:15:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:00,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 221 proven. 72 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-22 09:15:01,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018360552] [2021-12-22 09:15:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018360552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037297628] [2021-12-22 09:15:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:01,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:01,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:01,064 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) [2021-12-22 09:15:01,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:15:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:15:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 09:15:01,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:15:01,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037297628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:01,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:15:01,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:15:01,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870580389] [2021-12-22 09:15:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:01,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:01,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:15:01,888 INFO L87 Difference]: Start difference. First operand 17573 states and 19728 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:02,458 INFO L93 Difference]: Finished difference Result 37361 states and 41940 transitions. [2021-12-22 09:15:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 337 [2021-12-22 09:15:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:02,496 INFO L225 Difference]: With dead ends: 37361 [2021-12-22 09:15:02,511 INFO L226 Difference]: Without dead ends: 19974 [2021-12-22 09:15:02,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:15:02,540 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 365 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:15:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2021-12-22 09:15:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 19235. [2021-12-22 09:15:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 19234 states have (on average 1.116928356036186) internal successors, (21483), 19234 states have internal predecessors, (21483), 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) [2021-12-22 09:15:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 21483 transitions. [2021-12-22 09:15:02,906 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 21483 transitions. Word has length 337 [2021-12-22 09:15:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:02,906 INFO L470 AbstractCegarLoop]: Abstraction has 19235 states and 21483 transitions. [2021-12-22 09:15:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 21483 transitions. [2021-12-22 09:15:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-22 09:15:02,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:02,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 3, 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] [2021-12-22 09:15:02,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 09:15:03,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:03,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1351852439, now seen corresponding path program 1 times [2021-12-22 09:15:03,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:03,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150927367] [2021-12-22 09:15:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:03,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 254 proven. 54 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-22 09:15:03,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:03,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150927367] [2021-12-22 09:15:03,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150927367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:03,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378539826] [2021-12-22 09:15:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:03,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:03,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:03,309 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) [2021-12-22 09:15:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:15:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:15:03,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-22 09:15:04,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:15:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378539826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:04,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:15:04,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:15:04,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896447521] [2021-12-22 09:15:04,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:04,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:04,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:15:04,098 INFO L87 Difference]: Start difference. First operand 19235 states and 21483 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:04,664 INFO L93 Difference]: Finished difference Result 39389 states and 43927 transitions. [2021-12-22 09:15:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 358 [2021-12-22 09:15:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:04,681 INFO L225 Difference]: With dead ends: 39389 [2021-12-22 09:15:04,681 INFO L226 Difference]: Without dead ends: 20156 [2021-12-22 09:15:04,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:15:04,691 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:04,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 170 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:15:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-12-22 09:15:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 17753. [2021-12-22 09:15:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17753 states, 17752 states have (on average 1.1128323569175305) internal successors, (19755), 17752 states have internal predecessors, (19755), 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) [2021-12-22 09:15:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17753 states to 17753 states and 19755 transitions. [2021-12-22 09:15:04,838 INFO L78 Accepts]: Start accepts. Automaton has 17753 states and 19755 transitions. Word has length 358 [2021-12-22 09:15:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:04,838 INFO L470 AbstractCegarLoop]: Abstraction has 17753 states and 19755 transitions. [2021-12-22 09:15:04,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 17753 states and 19755 transitions. [2021-12-22 09:15:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-22 09:15:04,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:04,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:15:04,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:05,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 09:15:05,065 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash -93934851, now seen corresponding path program 1 times [2021-12-22 09:15:05,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:05,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168660377] [2021-12-22 09:15:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:05,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 267 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-22 09:15:05,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168660377] [2021-12-22 09:15:05,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168660377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241666154] [2021-12-22 09:15:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:05,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:05,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:05,235 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) [2021-12-22 09:15:05,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:15:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:05,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:15:05,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 202 proven. 143 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-22 09:15:06,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:15:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 297 proven. 48 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-22 09:15:06,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241666154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:15:06,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:15:06,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-22 09:15:06,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929959719] [2021-12-22 09:15:06,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:15:06,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 09:15:06,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 09:15:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-22 09:15:06,945 INFO L87 Difference]: Start difference. First operand 17753 states and 19755 transitions. Second operand has 11 states, 11 states have (on average 76.18181818181819) internal successors, (838), 11 states have internal predecessors, (838), 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) [2021-12-22 09:15:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:10,529 INFO L93 Difference]: Finished difference Result 47513 states and 52862 transitions. [2021-12-22 09:15:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 09:15:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 76.18181818181819) internal successors, (838), 11 states have internal predecessors, (838), 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 375 [2021-12-22 09:15:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:10,558 INFO L225 Difference]: With dead ends: 47513 [2021-12-22 09:15:10,559 INFO L226 Difference]: Without dead ends: 29210 [2021-12-22 09:15:10,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-12-22 09:15:10,574 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 2701 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 6671 mSolverCounterSat, 991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2701 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 7662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 6671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:10,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2701 Valid, 257 Invalid, 7662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [991 Valid, 6671 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 09:15:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29210 states. [2021-12-22 09:15:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29210 to 14431. [2021-12-22 09:15:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14431 states, 14430 states have (on average 1.1045738045738045) internal successors, (15939), 14430 states have internal predecessors, (15939), 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) [2021-12-22 09:15:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14431 states to 14431 states and 15939 transitions. [2021-12-22 09:15:10,801 INFO L78 Accepts]: Start accepts. Automaton has 14431 states and 15939 transitions. Word has length 375 [2021-12-22 09:15:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:10,801 INFO L470 AbstractCegarLoop]: Abstraction has 14431 states and 15939 transitions. [2021-12-22 09:15:10,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 76.18181818181819) internal successors, (838), 11 states have internal predecessors, (838), 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) [2021-12-22 09:15:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 14431 states and 15939 transitions. [2021-12-22 09:15:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-12-22 09:15:10,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:10,809 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:15:10,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:11,016 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 [2021-12-22 09:15:11,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:11,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1257108569, now seen corresponding path program 1 times [2021-12-22 09:15:11,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:11,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733844262] [2021-12-22 09:15:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:11,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 143 proven. 202 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 09:15:11,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733844262] [2021-12-22 09:15:11,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733844262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616815719] [2021-12-22 09:15:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:11,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:11,203 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) [2021-12-22 09:15:11,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:15:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:11,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:15:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 09:15:11,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:15:11,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616815719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:11,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:15:11,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:15:11,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289664890] [2021-12-22 09:15:11,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:11,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:11,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:11,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:15:11,887 INFO L87 Difference]: Start difference. First operand 14431 states and 15939 transitions. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-22 09:15:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:12,764 INFO L93 Difference]: Finished difference Result 29972 states and 33114 transitions. [2021-12-22 09:15:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:15:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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 381 [2021-12-22 09:15:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:12,780 INFO L225 Difference]: With dead ends: 29972 [2021-12-22 09:15:12,780 INFO L226 Difference]: Without dead ends: 15911 [2021-12-22 09:15:12,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:15:12,790 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 220 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:12,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 111 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:15:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15911 states. [2021-12-22 09:15:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15911 to 14801. [2021-12-22 09:15:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 1.1028378378378378) internal successors, (16322), 14800 states have internal predecessors, (16322), 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) [2021-12-22 09:15:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 16322 transitions. [2021-12-22 09:15:12,955 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 16322 transitions. Word has length 381 [2021-12-22 09:15:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:12,956 INFO L470 AbstractCegarLoop]: Abstraction has 14801 states and 16322 transitions. [2021-12-22 09:15:12,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-22 09:15:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 16322 transitions. [2021-12-22 09:15:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-22 09:15:12,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:12,968 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:13,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:13,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:15:13,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1465243018, now seen corresponding path program 1 times [2021-12-22 09:15:13,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:13,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166047867] [2021-12-22 09:15:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:13,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-22 09:15:13,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166047867] [2021-12-22 09:15:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166047867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:13,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866971617] [2021-12-22 09:15:13,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:13,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:15:13,364 INFO L87 Difference]: Start difference. First operand 14801 states and 16322 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2021-12-22 09:15:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:14,211 INFO L93 Difference]: Finished difference Result 35127 states and 38624 transitions. [2021-12-22 09:15:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:15:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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 414 [2021-12-22 09:15:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:14,232 INFO L225 Difference]: With dead ends: 35127 [2021-12-22 09:15:14,232 INFO L226 Difference]: Without dead ends: 20696 [2021-12-22 09:15:14,242 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 [2021-12-22 09:15:14,242 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 197 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:14,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 68 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:15:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20696 states. [2021-12-22 09:15:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20696 to 19771. [2021-12-22 09:15:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19771 states, 19770 states have (on average 1.0975720789074355) internal successors, (21699), 19770 states have internal predecessors, (21699), 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) [2021-12-22 09:15:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19771 states to 19771 states and 21699 transitions. [2021-12-22 09:15:14,414 INFO L78 Accepts]: Start accepts. Automaton has 19771 states and 21699 transitions. Word has length 414 [2021-12-22 09:15:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:14,415 INFO L470 AbstractCegarLoop]: Abstraction has 19771 states and 21699 transitions. [2021-12-22 09:15:14,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2021-12-22 09:15:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19771 states and 21699 transitions. [2021-12-22 09:15:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-22 09:15:14,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:14,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:14,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:15:14,476 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1627853402, now seen corresponding path program 1 times [2021-12-22 09:15:14,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651710809] [2021-12-22 09:15:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:14,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 143 proven. 229 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:15:14,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651710809] [2021-12-22 09:15:14,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651710809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065282536] [2021-12-22 09:15:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:14,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:14,636 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) [2021-12-22 09:15:14,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 09:15:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 09:15:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:16,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:15:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065282536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:15:19,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:15:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-22 09:15:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50428812] [2021-12-22 09:15:19,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:15:19,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 09:15:19,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 09:15:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-22 09:15:19,825 INFO L87 Difference]: Start difference. First operand 19771 states and 21699 transitions. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2021-12-22 09:15:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:24,581 INFO L93 Difference]: Finished difference Result 54570 states and 59615 transitions. [2021-12-22 09:15:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 09:15:24,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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 417 [2021-12-22 09:15:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:24,614 INFO L225 Difference]: With dead ends: 54570 [2021-12-22 09:15:24,614 INFO L226 Difference]: Without dead ends: 34801 [2021-12-22 09:15:24,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 09:15:24,624 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5236 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 5963 mSolverCounterSat, 1627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5236 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 7590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1627 IncrementalHoareTripleChecker+Valid, 5963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:24,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5236 Valid, 159 Invalid, 7590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1627 Valid, 5963 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-22 09:15:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34801 states. [2021-12-22 09:15:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34801 to 23265. [2021-12-22 09:15:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23265 states, 23264 states have (on average 1.075137551581843) internal successors, (25012), 23264 states have internal predecessors, (25012), 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) [2021-12-22 09:15:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23265 states to 23265 states and 25012 transitions. [2021-12-22 09:15:24,951 INFO L78 Accepts]: Start accepts. Automaton has 23265 states and 25012 transitions. Word has length 417 [2021-12-22 09:15:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 23265 states and 25012 transitions. [2021-12-22 09:15:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2021-12-22 09:15:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 23265 states and 25012 transitions. [2021-12-22 09:15:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-22 09:15:24,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:24,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:24,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:25,185 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 [2021-12-22 09:15:25,185 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1101386183, now seen corresponding path program 1 times [2021-12-22 09:15:25,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:25,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287068811] [2021-12-22 09:15:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:25,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 09:15:25,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287068811] [2021-12-22 09:15:25,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287068811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:25,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:25,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:25,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190119557] [2021-12-22 09:15:25,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:25,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:25,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:25,371 INFO L87 Difference]: Start difference. First operand 23265 states and 25012 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2021-12-22 09:15:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:25,966 INFO L93 Difference]: Finished difference Result 45063 states and 48488 transitions. [2021-12-22 09:15:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 511 [2021-12-22 09:15:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:25,990 INFO L225 Difference]: With dead ends: 45063 [2021-12-22 09:15:25,990 INFO L226 Difference]: Without dead ends: 23642 [2021-12-22 09:15:26,004 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 [2021-12-22 09:15:26,004 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:26,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:15:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23642 states. [2021-12-22 09:15:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23642 to 22897. [2021-12-22 09:15:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22897 states, 22896 states have (on average 1.0722396925227113) internal successors, (24550), 22896 states have internal predecessors, (24550), 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) [2021-12-22 09:15:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22897 states to 22897 states and 24550 transitions. [2021-12-22 09:15:26,225 INFO L78 Accepts]: Start accepts. Automaton has 22897 states and 24550 transitions. Word has length 511 [2021-12-22 09:15:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 22897 states and 24550 transitions. [2021-12-22 09:15:26,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2021-12-22 09:15:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22897 states and 24550 transitions. [2021-12-22 09:15:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-12-22 09:15:26,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:26,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:15:26,235 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1677270036, now seen corresponding path program 1 times [2021-12-22 09:15:26,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466140991] [2021-12-22 09:15:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:26,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 514 proven. 3 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 09:15:26,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466140991] [2021-12-22 09:15:26,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466140991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206954728] [2021-12-22 09:15:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:26,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:26,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:26,525 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) [2021-12-22 09:15:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 09:15:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:26,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:15:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 09:15:27,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:15:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206954728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:27,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:15:27,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-22 09:15:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694373225] [2021-12-22 09:15:27,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:27,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:27,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:15:27,373 INFO L87 Difference]: Start difference. First operand 22897 states and 24550 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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) [2021-12-22 09:15:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:27,973 INFO L93 Difference]: Finished difference Result 46335 states and 49686 transitions. [2021-12-22 09:15:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:15:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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 512 [2021-12-22 09:15:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:28,029 INFO L225 Difference]: With dead ends: 46335 [2021-12-22 09:15:28,031 INFO L226 Difference]: Without dead ends: 23624 [2021-12-22 09:15:28,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:15:28,046 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 259 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:28,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 156 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:15:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23624 states. [2021-12-22 09:15:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23624 to 21411. [2021-12-22 09:15:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21411 states, 21410 states have (on average 1.0685660906118637) internal successors, (22878), 21410 states have internal predecessors, (22878), 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) [2021-12-22 09:15:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21411 states to 21411 states and 22878 transitions. [2021-12-22 09:15:28,250 INFO L78 Accepts]: Start accepts. Automaton has 21411 states and 22878 transitions. Word has length 512 [2021-12-22 09:15:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:28,251 INFO L470 AbstractCegarLoop]: Abstraction has 21411 states and 22878 transitions. [2021-12-22 09:15:28,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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) [2021-12-22 09:15:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 21411 states and 22878 transitions. [2021-12-22 09:15:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2021-12-22 09:15:28,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:28,262 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 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] [2021-12-22 09:15:28,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:28,479 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 [2021-12-22 09:15:28,479 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1808437552, now seen corresponding path program 1 times [2021-12-22 09:15:28,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761136998] [2021-12-22 09:15:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:28,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 609 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:28,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761136998] [2021-12-22 09:15:28,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761136998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849398443] [2021-12-22 09:15:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:28,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:28,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:28,860 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) [2021-12-22 09:15:28,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 09:15:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:15:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 696 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 09:15:29,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:15:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849398443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:29,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:15:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-22 09:15:29,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159259575] [2021-12-22 09:15:29,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:15:29,724 INFO L87 Difference]: Start difference. First operand 21411 states and 22878 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2021-12-22 09:15:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:30,288 INFO L93 Difference]: Finished difference Result 43197 states and 46139 transitions. [2021-12-22 09:15:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 539 [2021-12-22 09:15:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:30,309 INFO L225 Difference]: With dead ends: 43197 [2021-12-22 09:15:30,310 INFO L226 Difference]: Without dead ends: 23446 [2021-12-22 09:15:30,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:15:30,323 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:30,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 338 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:15:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23446 states. [2021-12-22 09:15:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23446 to 21043. [2021-12-22 09:15:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21043 states, 21042 states have (on average 1.068814751449482) internal successors, (22490), 21042 states have internal predecessors, (22490), 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) [2021-12-22 09:15:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21043 states to 21043 states and 22490 transitions. [2021-12-22 09:15:30,614 INFO L78 Accepts]: Start accepts. Automaton has 21043 states and 22490 transitions. Word has length 539 [2021-12-22 09:15:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:30,614 INFO L470 AbstractCegarLoop]: Abstraction has 21043 states and 22490 transitions. [2021-12-22 09:15:30,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2021-12-22 09:15:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21043 states and 22490 transitions. [2021-12-22 09:15:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-22 09:15:30,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:30,627 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:30,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:30,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:30,837 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:30,838 INFO L85 PathProgramCache]: Analyzing trace with hash 27903080, now seen corresponding path program 1 times [2021-12-22 09:15:30,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:30,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295048055] [2021-12-22 09:15:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:30,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 09:15:31,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295048055] [2021-12-22 09:15:31,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295048055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043028861] [2021-12-22 09:15:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:31,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:31,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:31,038 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) [2021-12-22 09:15:31,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 09:15:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 09:15:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 241 proven. 454 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-22 09:15:32,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:15:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 09:15:34,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043028861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:15:34,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:15:34,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2021-12-22 09:15:34,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479295936] [2021-12-22 09:15:34,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:15:34,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 09:15:34,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 09:15:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:15:34,329 INFO L87 Difference]: Start difference. First operand 21043 states and 22490 transitions. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2021-12-22 09:15:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:36,144 INFO L93 Difference]: Finished difference Result 38746 states and 41220 transitions. [2021-12-22 09:15:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 09:15:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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 572 [2021-12-22 09:15:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:36,182 INFO L225 Difference]: With dead ends: 38746 [2021-12-22 09:15:36,183 INFO L226 Difference]: Without dead ends: 38744 [2021-12-22 09:15:36,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:15:36,192 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1273 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:36,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 125 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 3138 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:15:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38744 states. [2021-12-22 09:15:36,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38744 to 13667. [2021-12-22 09:15:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13667 states, 13666 states have (on average 1.0715644665593445) internal successors, (14644), 13666 states have internal predecessors, (14644), 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) [2021-12-22 09:15:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13667 states to 13667 states and 14644 transitions. [2021-12-22 09:15:36,427 INFO L78 Accepts]: Start accepts. Automaton has 13667 states and 14644 transitions. Word has length 572 [2021-12-22 09:15:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:36,428 INFO L470 AbstractCegarLoop]: Abstraction has 13667 states and 14644 transitions. [2021-12-22 09:15:36,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2021-12-22 09:15:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 13667 states and 14644 transitions. [2021-12-22 09:15:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-12-22 09:15:36,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:36,460 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:36,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 09:15:36,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-22 09:15:36,675 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1930042227, now seen corresponding path program 1 times [2021-12-22 09:15:36,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517461926] [2021-12-22 09:15:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-22 09:15:36,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517461926] [2021-12-22 09:15:36,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517461926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:36,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:36,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:36,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976502897] [2021-12-22 09:15:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:36,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:15:36,806 INFO L87 Difference]: Start difference. First operand 13667 states and 14644 transitions. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2021-12-22 09:15:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:37,584 INFO L93 Difference]: Finished difference Result 30474 states and 32582 transitions. [2021-12-22 09:15:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:15:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 586 [2021-12-22 09:15:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:37,599 INFO L225 Difference]: With dead ends: 30474 [2021-12-22 09:15:37,599 INFO L226 Difference]: Without dead ends: 16071 [2021-12-22 09:15:37,609 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 [2021-12-22 09:15:37,609 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 185 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:37,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 69 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:15:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16071 states. [2021-12-22 09:15:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16071 to 13851. [2021-12-22 09:15:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13851 states, 13850 states have (on average 1.0699638989169675) internal successors, (14819), 13850 states have internal predecessors, (14819), 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) [2021-12-22 09:15:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13851 states to 13851 states and 14819 transitions. [2021-12-22 09:15:37,751 INFO L78 Accepts]: Start accepts. Automaton has 13851 states and 14819 transitions. Word has length 586 [2021-12-22 09:15:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:37,751 INFO L470 AbstractCegarLoop]: Abstraction has 13851 states and 14819 transitions. [2021-12-22 09:15:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2021-12-22 09:15:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 13851 states and 14819 transitions. [2021-12-22 09:15:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2021-12-22 09:15:37,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:37,763 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 09:15:37,763 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1100874474, now seen corresponding path program 1 times [2021-12-22 09:15:37,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034426783] [2021-12-22 09:15:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:37,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 890 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-22 09:15:37,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034426783] [2021-12-22 09:15:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034426783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:37,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:37,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927956512] [2021-12-22 09:15:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:37,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:37,922 INFO L87 Difference]: Start difference. First operand 13851 states and 14819 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2021-12-22 09:15:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:38,435 INFO L93 Difference]: Finished difference Result 28624 states and 30520 transitions. [2021-12-22 09:15:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 704 [2021-12-22 09:15:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:38,496 INFO L225 Difference]: With dead ends: 28624 [2021-12-22 09:15:38,497 INFO L226 Difference]: Without dead ends: 14775 [2021-12-22 09:15:38,499 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 [2021-12-22 09:15:38,499 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 123 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:38,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:15:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-12-22 09:15:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 12747. [2021-12-22 09:15:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12747 states, 12746 states have (on average 1.0648831005805743) internal successors, (13573), 12746 states have internal predecessors, (13573), 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) [2021-12-22 09:15:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12747 states to 12747 states and 13573 transitions. [2021-12-22 09:15:38,613 INFO L78 Accepts]: Start accepts. Automaton has 12747 states and 13573 transitions. Word has length 704 [2021-12-22 09:15:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:38,614 INFO L470 AbstractCegarLoop]: Abstraction has 12747 states and 13573 transitions. [2021-12-22 09:15:38,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2021-12-22 09:15:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12747 states and 13573 transitions. [2021-12-22 09:15:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-12-22 09:15:38,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:38,625 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 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] [2021-12-22 09:15:38,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 09:15:38,626 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1565644488, now seen corresponding path program 1 times [2021-12-22 09:15:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:38,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659998653] [2021-12-22 09:15:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:38,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 1314 proven. 73 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-22 09:15:38,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659998653] [2021-12-22 09:15:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659998653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492033954] [2021-12-22 09:15:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:38,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:38,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:15:38,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 09:15:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:39,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 09:15:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:15:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-22 09:15:41,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:15:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-22 09:15:43,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492033954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:15:43,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:15:43,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2021-12-22 09:15:43,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202719032] [2021-12-22 09:15:43,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:15:43,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 09:15:43,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 09:15:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-22 09:15:43,256 INFO L87 Difference]: Start difference. First operand 12747 states and 13573 transitions. Second operand has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2021-12-22 09:15:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:47,611 INFO L93 Difference]: Finished difference Result 32910 states and 34979 transitions. [2021-12-22 09:15:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 09:15:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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 835 [2021-12-22 09:15:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:47,629 INFO L225 Difference]: With dead ends: 32910 [2021-12-22 09:15:47,629 INFO L226 Difference]: Without dead ends: 20165 [2021-12-22 09:15:47,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1725 GetRequests, 1686 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 09:15:47,638 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 4512 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 8013 mSolverCounterSat, 1390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4512 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 9403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1390 IncrementalHoareTripleChecker+Valid, 8013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:47,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4512 Valid, 194 Invalid, 9403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1390 Valid, 8013 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-22 09:15:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20165 states. [2021-12-22 09:15:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20165 to 9605. [2021-12-22 09:15:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.0630987088713035) internal successors, (10210), 9604 states have internal predecessors, (10210), 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) [2021-12-22 09:15:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10210 transitions. [2021-12-22 09:15:47,818 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10210 transitions. Word has length 835 [2021-12-22 09:15:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:47,818 INFO L470 AbstractCegarLoop]: Abstraction has 9605 states and 10210 transitions. [2021-12-22 09:15:47,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2021-12-22 09:15:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10210 transitions. [2021-12-22 09:15:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2021-12-22 09:15:47,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:47,831 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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] [2021-12-22 09:15:47,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 09:15:48,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 09:15:48,051 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:48,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1907753503, now seen corresponding path program 1 times [2021-12-22 09:15:48,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:48,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708234473] [2021-12-22 09:15:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:48,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 1638 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-12-22 09:15:48,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708234473] [2021-12-22 09:15:48,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708234473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:48,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:48,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:48,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174416751] [2021-12-22 09:15:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:48,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:48,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:48,260 INFO L87 Difference]: Start difference. First operand 9605 states and 10210 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2021-12-22 09:15:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:48,784 INFO L93 Difference]: Finished difference Result 19394 states and 20625 transitions. [2021-12-22 09:15:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 892 [2021-12-22 09:15:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:48,793 INFO L225 Difference]: With dead ends: 19394 [2021-12-22 09:15:48,794 INFO L226 Difference]: Without dead ends: 10343 [2021-12-22 09:15:48,798 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 [2021-12-22 09:15:48,799 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 123 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:48,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 122 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:15:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10343 states. [2021-12-22 09:15:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10343 to 9605. [2021-12-22 09:15:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.0625780924614743) internal successors, (10205), 9604 states have internal predecessors, (10205), 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) [2021-12-22 09:15:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10205 transitions. [2021-12-22 09:15:48,892 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10205 transitions. Word has length 892 [2021-12-22 09:15:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:48,893 INFO L470 AbstractCegarLoop]: Abstraction has 9605 states and 10205 transitions. [2021-12-22 09:15:48,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2021-12-22 09:15:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10205 transitions. [2021-12-22 09:15:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2021-12-22 09:15:48,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:48,904 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:48,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 09:15:48,904 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1710428929, now seen corresponding path program 1 times [2021-12-22 09:15:48,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:48,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323326743] [2021-12-22 09:15:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:48,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 2039 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2021-12-22 09:15:49,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323326743] [2021-12-22 09:15:49,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323326743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:49,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:49,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:49,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814942635] [2021-12-22 09:15:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:49,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:49,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:49,099 INFO L87 Difference]: Start difference. First operand 9605 states and 10205 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2021-12-22 09:15:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:49,572 INFO L93 Difference]: Finished difference Result 19027 states and 20214 transitions. [2021-12-22 09:15:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 915 [2021-12-22 09:15:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:49,580 INFO L225 Difference]: With dead ends: 19027 [2021-12-22 09:15:49,581 INFO L226 Difference]: Without dead ends: 9792 [2021-12-22 09:15:49,586 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 [2021-12-22 09:15:49,587 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:49,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 335 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:15:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-12-22 09:15:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8685. [2021-12-22 09:15:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 1.0620681713496085) internal successors, (9223), 8684 states have internal predecessors, (9223), 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) [2021-12-22 09:15:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 9223 transitions. [2021-12-22 09:15:49,677 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 9223 transitions. Word has length 915 [2021-12-22 09:15:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:49,677 INFO L470 AbstractCegarLoop]: Abstraction has 8685 states and 9223 transitions. [2021-12-22 09:15:49,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2021-12-22 09:15:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 9223 transitions. [2021-12-22 09:15:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2021-12-22 09:15:49,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:49,690 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-22 09:15:49,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 09:15:49,690 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1236626021, now seen corresponding path program 1 times [2021-12-22 09:15:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717273968] [2021-12-22 09:15:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:49,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4128 backedges. 2832 proven. 0 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-12-22 09:15:50,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717273968] [2021-12-22 09:15:50,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717273968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:50,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:50,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:15:50,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161515998] [2021-12-22 09:15:50,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:50,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:50,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:15:50,002 INFO L87 Difference]: Start difference. First operand 8685 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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)