./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label13.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 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:59:44,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:59:44,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:59:44,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:59:44,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:59:44,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:59:44,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:59:44,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:59:44,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:59:44,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:59:44,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:59:44,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:59:44,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:59:44,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:59:44,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:59:44,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:59:44,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:59:44,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:59:44,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:59:44,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:59:44,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:59:44,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:59:44,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:59:44,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:59:44,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:59:44,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:59:44,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:59:44,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:59:44,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:59:44,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:59:44,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:59:44,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:59:44,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:59:44,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:59:44,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:59:44,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:59:44,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:59:44,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:59:44,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:59:44,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:59:44,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:59:44,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:59:44,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:59:44,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:59:44,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:59:44,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:59:44,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:59:44,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:59:44,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:59:44,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:59:44,517 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:59:44,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:59:44,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:59:44,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:59:44,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:59:44,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:59:44,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:59:44,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:59:44,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:59:44,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:44,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:59:44,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:59:44,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:59:44,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:59:44,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 [2021-12-15 22:59:44,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:59:44,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:59:44,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:59:44,712 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:59:44,712 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:59:44,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2021-12-15 22:59:44,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365891af6/1e90be804abd46a981789c2849f193bf/FLAGa1dea8005 [2021-12-15 22:59:45,220 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:59:45,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2021-12-15 22:59:45,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365891af6/1e90be804abd46a981789c2849f193bf/FLAGa1dea8005 [2021-12-15 22:59:45,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365891af6/1e90be804abd46a981789c2849f193bf [2021-12-15 22:59:45,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:59:45,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:59:45,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:45,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:59:45,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:59:45,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:45" (1/1) ... [2021-12-15 22:59:45,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b7bacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:45, skipping insertion in model container [2021-12-15 22:59:45,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:45" (1/1) ... [2021-12-15 22:59:45,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:59:45,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:59:45,766 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/Problem17_label13.c[4647,4660] [2021-12-15 22:59:46,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:46,145 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:59:46,163 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/Problem17_label13.c[4647,4660] [2021-12-15 22:59:46,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:46,344 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:59:46,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46 WrapperNode [2021-12-15 22:59:46,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:46,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:46,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:59:46,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:59:46,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,593 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 22:59:46,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:46,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:59:46,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:59:46,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:59:46,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:59:46,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:59:46,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:59:46,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:59:46,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (1/1) ... [2021-12-15 22:59:46,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:46,967 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) [2021-12-15 22:59:47,007 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 [2021-12-15 22:59:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:59:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:59:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:59:47,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:59:47,091 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:59:47,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:59:49,198 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:59:49,206 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:59:49,207 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:59:49,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:49 BoogieIcfgContainer [2021-12-15 22:59:49,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:59:49,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:59:49,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:59:49,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:59:49,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:59:45" (1/3) ... [2021-12-15 22:59:49,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15254475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:49, skipping insertion in model container [2021-12-15 22:59:49,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:46" (2/3) ... [2021-12-15 22:59:49,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15254475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:49, skipping insertion in model container [2021-12-15 22:59:49,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:49" (3/3) ... [2021-12-15 22:59:49,214 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label13.c [2021-12-15 22:59:49,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:59:49,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:59:49,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:59:49,269 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 [2021-12-15 22:59:49,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:59:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 22:59:49,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:49,290 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] [2021-12-15 22:59:49,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1722039382, now seen corresponding path program 1 times [2021-12-15 22:59:49,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:49,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032870191] [2021-12-15 22:59:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:49,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:49,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032870191] [2021-12-15 22:59:49,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032870191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:49,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:49,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:49,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067817245] [2021-12-15 22:59:49,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:49,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:49,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:49,514 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:51,865 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-15 22:59:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 22:59:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:51,883 INFO L225 Difference]: With dead ends: 1642 [2021-12-15 22:59:51,884 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 22:59:51,898 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 [2021-12-15 22:59:51,901 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 460 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:51,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:59:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 22:59:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-15 22:59:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-15 22:59:51,982 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 30 [2021-12-15 22:59:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:51,983 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-15 22:59:51,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-15 22:59:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 22:59:51,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:51,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:51,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:59:51,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2075444362, now seen corresponding path program 1 times [2021-12-15 22:59:51,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174357721] [2021-12-15 22:59:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:51,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:52,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174357721] [2021-12-15 22:59:52,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174357721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:52,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:52,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:52,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970359927] [2021-12-15 22:59:52,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:52,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:52,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:52,118 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:54,235 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-15 22:59:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-15 22:59:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:54,241 INFO L225 Difference]: With dead ends: 2814 [2021-12-15 22:59:54,241 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 22:59:54,243 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 [2021-12-15 22:59:54,244 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 461 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:54,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:59:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 22:59:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-15 22:59:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-15 22:59:54,270 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 100 [2021-12-15 22:59:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:54,271 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-15 22:59:54,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-15 22:59:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 22:59:54,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:54,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:59:54,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash 589156889, now seen corresponding path program 1 times [2021-12-15 22:59:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545137752] [2021-12-15 22:59:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:54,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:54,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545137752] [2021-12-15 22:59:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545137752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:54,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257904312] [2021-12-15 22:59:54,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:54,330 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:56,263 INFO L93 Difference]: Finished difference Result 5445 states and 7408 transitions. [2021-12-15 22:59:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-15 22:59:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:56,279 INFO L225 Difference]: With dead ends: 5445 [2021-12-15 22:59:56,279 INFO L226 Difference]: Without dead ends: 3605 [2021-12-15 22:59:56,281 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 [2021-12-15 22:59:56,286 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 440 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:56,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 273 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:59:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-12-15 22:59:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 3583. [2021-12-15 22:59:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-15 22:59:56,331 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 122 [2021-12-15 22:59:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:56,331 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-15 22:59:56,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-15 22:59:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 22:59:56,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:56,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:56,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:59:56,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2095642724, now seen corresponding path program 1 times [2021-12-15 22:59:56,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:56,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531083989] [2021-12-15 22:59:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:56,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:56,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531083989] [2021-12-15 22:59:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531083989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:56,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:56,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:56,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955684283] [2021-12-15 22:59:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:56,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:56,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:56,446 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:58,885 INFO L93 Difference]: Finished difference Result 8893 states and 11846 transitions. [2021-12-15 22:59:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-15 22:59:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:58,899 INFO L225 Difference]: With dead ends: 8893 [2021-12-15 22:59:58,900 INFO L226 Difference]: Without dead ends: 5312 [2021-12-15 22:59:58,903 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 [2021-12-15 22:59:58,904 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:58,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:59:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-15 22:59:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5292. [2021-12-15 22:59:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 5291 states have (on average 1.2797202797202798) internal successors, (6771), 5291 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 6771 transitions. [2021-12-15 22:59:58,975 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 6771 transitions. Word has length 135 [2021-12-15 22:59:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 6771 transitions. [2021-12-15 22:59:58,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 6771 transitions. [2021-12-15 22:59:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 22:59:58,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:58,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:58,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:59:58,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash -767813459, now seen corresponding path program 1 times [2021-12-15 22:59:58,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:58,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184263519] [2021-12-15 22:59:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:58,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:59,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:59,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184263519] [2021-12-15 22:59:59,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184263519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:59,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:59,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:59,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026931482] [2021-12-15 22:59:59,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:59,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:59,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:59,121 INFO L87 Difference]: Start difference. First operand 5292 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:00,898 INFO L93 Difference]: Finished difference Result 9327 states and 12044 transitions. [2021-12-15 23:00:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:00:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-12-15 23:00:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:00,909 INFO L225 Difference]: With dead ends: 9327 [2021-12-15 23:00:00,909 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 23:00:00,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:00:00,914 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:00,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:00:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 23:00:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 23:00:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-15 23:00:00,961 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 141 [2021-12-15 23:00:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:00,961 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-15 23:00:00,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-15 23:00:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-15 23:00:00,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:00,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:00:00,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1536104559, now seen corresponding path program 1 times [2021-12-15 23:00:00,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:00,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148800718] [2021-12-15 23:00:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:00,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 23:00:01,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148800718] [2021-12-15 23:00:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148800718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:01,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:00:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594379398] [2021-12-15 23:00:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:01,077 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:02,615 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-15 23:00:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:02,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-15 23:00:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:02,629 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 23:00:02,629 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 23:00:02,634 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 [2021-12-15 23:00:02,636 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:02,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:00:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 23:00:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4427. [2021-12-15 23:00:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.208992318120199) internal successors, (5351), 4426 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 5351 transitions. [2021-12-15 23:00:02,686 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 5351 transitions. Word has length 169 [2021-12-15 23:00:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 5351 transitions. [2021-12-15 23:00:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 5351 transitions. [2021-12-15 23:00:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-15 23:00:02,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:02,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:02,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:00:02,689 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 944572557, now seen corresponding path program 1 times [2021-12-15 23:00:02,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:02,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469635646] [2021-12-15 23:00:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:02,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:02,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:02,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469635646] [2021-12-15 23:00:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469635646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:02,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:02,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:02,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938797813] [2021-12-15 23:00:02,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:02,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:02,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:02,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:02,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:02,756 INFO L87 Difference]: Start difference. First operand 4427 states and 5351 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:04,234 INFO L93 Difference]: Finished difference Result 11399 states and 13997 transitions. [2021-12-15 23:00:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-12-15 23:00:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:04,255 INFO L225 Difference]: With dead ends: 11399 [2021-12-15 23:00:04,261 INFO L226 Difference]: Without dead ends: 6974 [2021-12-15 23:00:04,270 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 [2021-12-15 23:00:04,283 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:00:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2021-12-15 23:00:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6974. [2021-12-15 23:00:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6973 states have (on average 1.1834217696830633) internal successors, (8252), 6973 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 8252 transitions. [2021-12-15 23:00:04,439 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 8252 transitions. Word has length 182 [2021-12-15 23:00:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:04,439 INFO L470 AbstractCegarLoop]: Abstraction has 6974 states and 8252 transitions. [2021-12-15 23:00:04,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 8252 transitions. [2021-12-15 23:00:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-15 23:00:04,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:04,442 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:04,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:00:04,442 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash 185887176, now seen corresponding path program 1 times [2021-12-15 23:00:04,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127520329] [2021-12-15 23:00:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 23:00:04,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:04,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127520329] [2021-12-15 23:00:04,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127520329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:04,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:04,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:04,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776002626] [2021-12-15 23:00:04,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:04,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:04,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:04,543 INFO L87 Difference]: Start difference. First operand 6974 states and 8252 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:06,120 INFO L93 Difference]: Finished difference Result 16914 states and 20159 transitions. [2021-12-15 23:00:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 184 [2021-12-15 23:00:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:06,154 INFO L225 Difference]: With dead ends: 16914 [2021-12-15 23:00:06,154 INFO L226 Difference]: Without dead ends: 9941 [2021-12-15 23:00:06,160 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 [2021-12-15 23:00:06,161 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 421 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:06,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:00:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-12-15 23:00:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 7373. [2021-12-15 23:00:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7373 states, 7372 states have (on average 1.1795984807379274) internal successors, (8696), 7372 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7373 states to 7373 states and 8696 transitions. [2021-12-15 23:00:06,324 INFO L78 Accepts]: Start accepts. Automaton has 7373 states and 8696 transitions. Word has length 184 [2021-12-15 23:00:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 7373 states and 8696 transitions. [2021-12-15 23:00:06,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7373 states and 8696 transitions. [2021-12-15 23:00:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-15 23:00:06,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:06,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:06,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:00:06,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2139731954, now seen corresponding path program 1 times [2021-12-15 23:00:06,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:06,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837200671] [2021-12-15 23:00:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:06,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:06,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:06,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837200671] [2021-12-15 23:00:06,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837200671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:06,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:06,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145650803] [2021-12-15 23:00:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:06,482 INFO L87 Difference]: Start difference. First operand 7373 states and 8696 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:08,292 INFO L93 Difference]: Finished difference Result 16027 states and 18850 transitions. [2021-12-15 23:00:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:08,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 250 [2021-12-15 23:00:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:08,304 INFO L225 Difference]: With dead ends: 16027 [2021-12-15 23:00:08,315 INFO L226 Difference]: Without dead ends: 8656 [2021-12-15 23:00:08,320 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 [2021-12-15 23:00:08,321 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 406 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:08,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 894 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:00:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8656 states. [2021-12-15 23:00:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8656 to 8225. [2021-12-15 23:00:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8225 states, 8224 states have (on average 1.1723005836575875) internal successors, (9641), 8224 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8225 states to 8225 states and 9641 transitions. [2021-12-15 23:00:08,458 INFO L78 Accepts]: Start accepts. Automaton has 8225 states and 9641 transitions. Word has length 250 [2021-12-15 23:00:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:08,471 INFO L470 AbstractCegarLoop]: Abstraction has 8225 states and 9641 transitions. [2021-12-15 23:00:08,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8225 states and 9641 transitions. [2021-12-15 23:00:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 23:00:08,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:08,474 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:08,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:00:08,474 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -240602101, now seen corresponding path program 1 times [2021-12-15 23:00:08,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:08,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227757339] [2021-12-15 23:00:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:08,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:00:08,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227757339] [2021-12-15 23:00:08,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227757339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:08,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:08,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:08,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006512326] [2021-12-15 23:00:08,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:08,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:08,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:08,607 INFO L87 Difference]: Start difference. First operand 8225 states and 9641 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:10,061 INFO L93 Difference]: Finished difference Result 20307 states and 24030 transitions. [2021-12-15 23:00:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 262 [2021-12-15 23:00:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:10,075 INFO L225 Difference]: With dead ends: 20307 [2021-12-15 23:00:10,075 INFO L226 Difference]: Without dead ends: 11209 [2021-12-15 23:00:10,119 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 [2021-12-15 23:00:10,121 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 492 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:10,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 634 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:00:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11209 states. [2021-12-15 23:00:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11209 to 10354. [2021-12-15 23:00:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 1.1641070221191925) internal successors, (12052), 10353 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 12052 transitions. [2021-12-15 23:00:10,223 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 12052 transitions. Word has length 262 [2021-12-15 23:00:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:10,223 INFO L470 AbstractCegarLoop]: Abstraction has 10354 states and 12052 transitions. [2021-12-15 23:00:10,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 12052 transitions. [2021-12-15 23:00:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-15 23:00:10,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:10,227 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:10,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:00:10,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1367594688, now seen corresponding path program 1 times [2021-12-15 23:00:10,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:10,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432064678] [2021-12-15 23:00:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:10,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:10,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:10,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432064678] [2021-12-15 23:00:10,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432064678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:10,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:10,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:10,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289825707] [2021-12-15 23:00:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:10,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:10,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:10,317 INFO L87 Difference]: Start difference. First operand 10354 states and 12052 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:11,640 INFO L93 Difference]: Finished difference Result 25396 states and 29650 transitions. [2021-12-15 23:00:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 285 [2021-12-15 23:00:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:11,657 INFO L225 Difference]: With dead ends: 25396 [2021-12-15 23:00:11,657 INFO L226 Difference]: Without dead ends: 15044 [2021-12-15 23:00:11,666 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 [2021-12-15 23:00:11,667 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:11,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 341 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 23:00:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15044 states. [2021-12-15 23:00:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15044 to 14187. [2021-12-15 23:00:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14187 states, 14186 states have (on average 1.1635415198082617) internal successors, (16506), 14186 states have internal predecessors, (16506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14187 states to 14187 states and 16506 transitions. [2021-12-15 23:00:11,792 INFO L78 Accepts]: Start accepts. Automaton has 14187 states and 16506 transitions. Word has length 285 [2021-12-15 23:00:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:11,792 INFO L470 AbstractCegarLoop]: Abstraction has 14187 states and 16506 transitions. [2021-12-15 23:00:11,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 14187 states and 16506 transitions. [2021-12-15 23:00:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-12-15 23:00:11,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:11,797 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:11,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 23:00:11,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1810738291, now seen corresponding path program 1 times [2021-12-15 23:00:11,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:11,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678378525] [2021-12-15 23:00:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:11,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:11,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678378525] [2021-12-15 23:00:11,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678378525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:11,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:11,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:00:11,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685340773] [2021-12-15 23:00:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:11,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:11,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:11,941 INFO L87 Difference]: Start difference. First operand 14187 states and 16506 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:14,792 INFO L93 Difference]: Finished difference Result 45051 states and 52653 transitions. [2021-12-15 23:00:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:00:14,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 290 [2021-12-15 23:00:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:14,884 INFO L225 Difference]: With dead ends: 45051 [2021-12-15 23:00:14,889 INFO L226 Difference]: Without dead ends: 30011 [2021-12-15 23:00:14,919 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 [2021-12-15 23:00:14,920 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 879 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:14,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 271 Invalid, 3060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 23:00:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30011 states. [2021-12-15 23:00:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30011 to 29966. [2021-12-15 23:00:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29966 states, 29965 states have (on average 1.1530118471550141) internal successors, (34550), 29965 states have internal predecessors, (34550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29966 states to 29966 states and 34550 transitions. [2021-12-15 23:00:15,245 INFO L78 Accepts]: Start accepts. Automaton has 29966 states and 34550 transitions. Word has length 290 [2021-12-15 23:00:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:15,245 INFO L470 AbstractCegarLoop]: Abstraction has 29966 states and 34550 transitions. [2021-12-15 23:00:15,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29966 states and 34550 transitions. [2021-12-15 23:00:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 23:00:15,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:15,332 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:15,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 23:00:15,332 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash -808950251, now seen corresponding path program 1 times [2021-12-15 23:00:15,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917700884] [2021-12-15 23:00:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:15,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 247 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:15,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917700884] [2021-12-15 23:00:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917700884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964024222] [2021-12-15 23:00:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:15,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:15,475 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) [2021-12-15 23:00:15,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:00:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 23:00:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 23:00:16,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:00:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 23:00:17,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964024222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:00:17,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:00:17,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-15 23:00:17,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647826121] [2021-12-15 23:00:17,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:00:17,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 23:00:17,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 23:00:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:00:17,692 INFO L87 Difference]: Start difference. First operand 29966 states and 34550 transitions. Second operand has 9 states, 9 states have (on average 90.11111111111111) internal successors, (811), 9 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:28,901 INFO L93 Difference]: Finished difference Result 136229 states and 155763 transitions. [2021-12-15 23:00:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 23:00:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 90.11111111111111) internal successors, (811), 9 states have internal predecessors, (811), 0 states have call successors, (0), 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 325 [2021-12-15 23:00:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:29,036 INFO L225 Difference]: With dead ends: 136229 [2021-12-15 23:00:29,036 INFO L226 Difference]: Without dead ends: 102434 [2021-12-15 23:00:29,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-12-15 23:00:29,057 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 12262 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 12066 mSolverCounterSat, 2561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12262 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 14627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2561 IncrementalHoareTripleChecker+Valid, 12066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:29,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12262 Valid, 459 Invalid, 14627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2561 Valid, 12066 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2021-12-15 23:00:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-12-15 23:00:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 83190. [2021-12-15 23:00:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83190 states, 83189 states have (on average 1.1276250465806776) internal successors, (93806), 83189 states have internal predecessors, (93806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83190 states to 83190 states and 93806 transitions. [2021-12-15 23:00:30,497 INFO L78 Accepts]: Start accepts. Automaton has 83190 states and 93806 transitions. Word has length 325 [2021-12-15 23:00:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 83190 states and 93806 transitions. [2021-12-15 23:00:30,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 90.11111111111111) internal successors, (811), 9 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 83190 states and 93806 transitions. [2021-12-15 23:00:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-12-15 23:00:30,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:30,509 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:30,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 23:00:30,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 23:00:30,728 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash 244655743, now seen corresponding path program 1 times [2021-12-15 23:00:30,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:30,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626876406] [2021-12-15 23:00:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:30,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-12-15 23:00:31,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:31,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626876406] [2021-12-15 23:00:31,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626876406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:31,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:31,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:00:31,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661762797] [2021-12-15 23:00:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:31,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:31,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:31,103 INFO L87 Difference]: Start difference. First operand 83190 states and 93806 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:32,559 INFO L93 Difference]: Finished difference Result 162958 states and 183332 transitions. [2021-12-15 23:00:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 459 [2021-12-15 23:00:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:32,647 INFO L225 Difference]: With dead ends: 162958 [2021-12-15 23:00:32,647 INFO L226 Difference]: Without dead ends: 80619 [2021-12-15 23:00:32,845 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 [2021-12-15 23:00:32,856 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 608 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:32,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 105 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 23:00:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80619 states. [2021-12-15 23:00:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80619 to 79752. [2021-12-15 23:00:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79752 states, 79751 states have (on average 1.1199107221226066) internal successors, (89314), 79751 states have internal predecessors, (89314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79752 states to 79752 states and 89314 transitions. [2021-12-15 23:00:34,090 INFO L78 Accepts]: Start accepts. Automaton has 79752 states and 89314 transitions. Word has length 459 [2021-12-15 23:00:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:34,098 INFO L470 AbstractCegarLoop]: Abstraction has 79752 states and 89314 transitions. [2021-12-15 23:00:34,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 79752 states and 89314 transitions. [2021-12-15 23:00:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-12-15 23:00:34,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:34,144 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:34,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:00:34,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1853067753, now seen corresponding path program 1 times [2021-12-15 23:00:34,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:34,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378371714] [2021-12-15 23:00:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:34,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-15 23:00:34,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378371714] [2021-12-15 23:00:34,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378371714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:34,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:34,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:34,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047819585] [2021-12-15 23:00:34,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:34,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:34,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:34,321 INFO L87 Difference]: Start difference. First operand 79752 states and 89314 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:36,222 INFO L93 Difference]: Finished difference Result 168852 states and 189324 transitions. [2021-12-15 23:00:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 487 [2021-12-15 23:00:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:36,321 INFO L225 Difference]: With dead ends: 168852 [2021-12-15 23:00:36,321 INFO L226 Difference]: Without dead ends: 89952 [2021-12-15 23:00:36,362 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 [2021-12-15 23:00:36,362 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 242 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:36,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 777 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:00:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89952 states. [2021-12-15 23:00:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89952 to 83577. [2021-12-15 23:00:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83577 states, 83576 states have (on average 1.1062147027854887) internal successors, (92453), 83576 states have internal predecessors, (92453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83577 states to 83577 states and 92453 transitions. [2021-12-15 23:00:37,628 INFO L78 Accepts]: Start accepts. Automaton has 83577 states and 92453 transitions. Word has length 487 [2021-12-15 23:00:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:37,629 INFO L470 AbstractCegarLoop]: Abstraction has 83577 states and 92453 transitions. [2021-12-15 23:00:37,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 83577 states and 92453 transitions. [2021-12-15 23:00:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-15 23:00:37,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:37,645 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:37,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:00:37,645 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2126129999, now seen corresponding path program 1 times [2021-12-15 23:00:37,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:37,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689259456] [2021-12-15 23:00:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:37,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-15 23:00:37,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689259456] [2021-12-15 23:00:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689259456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:37,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853660786] [2021-12-15 23:00:37,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:37,809 INFO L87 Difference]: Start difference. First operand 83577 states and 92453 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:39,851 INFO L93 Difference]: Finished difference Result 186741 states and 207307 transitions. [2021-12-15 23:00:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 518 [2021-12-15 23:00:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:40,007 INFO L225 Difference]: With dead ends: 186741 [2021-12-15 23:00:40,008 INFO L226 Difference]: Without dead ends: 103591 [2021-12-15 23:00:40,073 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 [2021-12-15 23:00:40,073 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 439 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:40,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 208 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:00:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103591 states. [2021-12-15 23:00:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103591 to 98890. [2021-12-15 23:00:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98890 states, 98889 states have (on average 1.1022459525326376) internal successors, (109000), 98889 states have internal predecessors, (109000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98890 states to 98890 states and 109000 transitions. [2021-12-15 23:00:41,552 INFO L78 Accepts]: Start accepts. Automaton has 98890 states and 109000 transitions. Word has length 518 [2021-12-15 23:00:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:41,552 INFO L470 AbstractCegarLoop]: Abstraction has 98890 states and 109000 transitions. [2021-12-15 23:00:41,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 98890 states and 109000 transitions. [2021-12-15 23:00:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-12-15 23:00:41,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:41,564 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:41,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:00:41,565 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1109549102, now seen corresponding path program 1 times [2021-12-15 23:00:41,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:41,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730727947] [2021-12-15 23:00:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:41,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-15 23:00:42,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:42,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730727947] [2021-12-15 23:00:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730727947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:42,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:42,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:42,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071539278] [2021-12-15 23:00:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:42,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:42,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:42,199 INFO L87 Difference]: Start difference. First operand 98890 states and 109000 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:44,265 INFO L93 Difference]: Finished difference Result 205037 states and 225722 transitions. [2021-12-15 23:00:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 540 [2021-12-15 23:00:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:44,402 INFO L225 Difference]: With dead ends: 205037 [2021-12-15 23:00:44,402 INFO L226 Difference]: Without dead ends: 106149 [2021-12-15 23:00:44,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:44,428 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 408 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:44,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 236 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:00:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106149 states. [2021-12-15 23:00:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106149 to 101865. [2021-12-15 23:00:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101865 states, 101864 states have (on average 1.0967073745386005) internal successors, (111715), 101864 states have internal predecessors, (111715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101865 states to 101865 states and 111715 transitions. [2021-12-15 23:00:45,702 INFO L78 Accepts]: Start accepts. Automaton has 101865 states and 111715 transitions. Word has length 540 [2021-12-15 23:00:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:45,702 INFO L470 AbstractCegarLoop]: Abstraction has 101865 states and 111715 transitions. [2021-12-15 23:00:45,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 101865 states and 111715 transitions. [2021-12-15 23:00:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-12-15 23:00:45,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:45,714 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:45,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 23:00:45,714 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash -920286702, now seen corresponding path program 1 times [2021-12-15 23:00:45,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410323490] [2021-12-15 23:00:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:45,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-15 23:00:46,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410323490] [2021-12-15 23:00:46,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410323490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:46,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:46,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:46,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455292748] [2021-12-15 23:00:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:46,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:46,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:46,222 INFO L87 Difference]: Start difference. First operand 101865 states and 111715 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:48,048 INFO L93 Difference]: Finished difference Result 211810 states and 232142 transitions. [2021-12-15 23:00:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 544 [2021-12-15 23:00:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:48,197 INFO L225 Difference]: With dead ends: 211810 [2021-12-15 23:00:48,197 INFO L226 Difference]: Without dead ends: 110372 [2021-12-15 23:00:48,265 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 [2021-12-15 23:00:48,269 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 489 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:48,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 677 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:00:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110372 states. [2021-12-15 23:00:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110372 to 108241. [2021-12-15 23:00:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108241 states, 108240 states have (on average 1.0880358462675537) internal successors, (117769), 108240 states have internal predecessors, (117769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108241 states to 108241 states and 117769 transitions. [2021-12-15 23:00:49,788 INFO L78 Accepts]: Start accepts. Automaton has 108241 states and 117769 transitions. Word has length 544 [2021-12-15 23:00:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:49,789 INFO L470 AbstractCegarLoop]: Abstraction has 108241 states and 117769 transitions. [2021-12-15 23:00:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 108241 states and 117769 transitions. [2021-12-15 23:00:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-12-15 23:00:49,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:49,805 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:49,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 23:00:49,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1660415161, now seen corresponding path program 1 times [2021-12-15 23:00:49,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:49,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090583427] [2021-12-15 23:00:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:49,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 418 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:00:49,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090583427] [2021-12-15 23:00:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090583427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617751735] [2021-12-15 23:00:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:49,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:49,969 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) [2021-12-15 23:00:49,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:00:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:50,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:00:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 298 proven. 28 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 23:00:51,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:00:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 23:00:52,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617751735] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:52,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:00:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-15 23:00:52,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726232449] [2021-12-15 23:00:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:52,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:52,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:00:52,226 INFO L87 Difference]: Start difference. First operand 108241 states and 117769 transitions. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)