./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label40.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/Problem12_label40.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 73a01bf72501a4d4fd9191e765f3d0f74ec404c518d5b8b0854b5c8a20d6daee --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:42:25,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:42:25,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:42:25,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:42:25,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:42:25,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:42:25,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:42:25,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:42:25,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:42:25,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:42:25,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:42:25,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:42:25,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:42:25,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:42:25,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:42:25,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:42:25,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:42:25,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:42:25,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:42:25,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:42:25,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:42:25,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:42:25,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:42:25,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:42:25,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:42:25,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:42:25,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:42:25,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:42:25,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:42:25,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:42:25,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:42:25,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:42:25,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:42:25,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:42:25,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:42:25,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:42:25,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:42:25,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:42:25,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:42:25,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:42:25,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:42:25,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:42:25,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:42:25,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:42:25,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:42:25,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:42:25,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:42:25,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:42:25,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:42:25,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:42:25,555 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:42:25,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:42:25,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:42:25,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:42:25,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:42:25,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:42:25,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:42:25,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:42:25,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:42:25,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:42:25,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:42:25,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:42:25,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:42:25,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:42:25,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:42:25,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:42:25,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:42:25,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:42:25,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:42:25,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:42:25,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:42:25,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73a01bf72501a4d4fd9191e765f3d0f74ec404c518d5b8b0854b5c8a20d6daee [2021-12-15 22:42:25,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:42:25,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:42:25,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:42:25,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:42:25,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:42:25,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label40.c [2021-12-15 22:42:25,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e654a5618/22acb80197c94d2c8f656c449acfbd4c/FLAGf264bacda [2021-12-15 22:42:26,431 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:42:26,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label40.c [2021-12-15 22:42:26,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e654a5618/22acb80197c94d2c8f656c449acfbd4c/FLAGf264bacda [2021-12-15 22:42:26,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e654a5618/22acb80197c94d2c8f656c449acfbd4c [2021-12-15 22:42:26,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:42:26,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:42:26,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:42:26,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:42:26,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:42:26,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:42:26" (1/1) ... [2021-12-15 22:42:26,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb807b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:26, skipping insertion in model container [2021-12-15 22:42:26,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:42:26" (1/1) ... [2021-12-15 22:42:26,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:42:26,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:42:27,059 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/Problem12_label40.c[1561,1574] [2021-12-15 22:42:27,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:42:27,614 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:42:27,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label40.c[1561,1574] [2021-12-15 22:42:27,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:42:27,919 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:42:27,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27 WrapperNode [2021-12-15 22:42:27,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:42:27,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:42:27,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:42:27,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:42:27,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:27,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,217 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 22:42:28,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:42:28,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:42:28,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:42:28,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:42:28,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:42:28,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:42:28,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:42:28,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:42:28,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (1/1) ... [2021-12-15 22:42:28,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:42:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:42:28,685 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 22:42:28,715 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 22:42:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:42:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:42:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:42:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:42:28,783 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:42:28,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:42:31,568 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:42:31,583 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:42:31,583 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:42:31,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:42:31 BoogieIcfgContainer [2021-12-15 22:42:31,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:42:31,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:42:31,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:42:31,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:42:31,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:42:26" (1/3) ... [2021-12-15 22:42:31,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ded9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:42:31, skipping insertion in model container [2021-12-15 22:42:31,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:42:27" (2/3) ... [2021-12-15 22:42:31,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ded9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:42:31, skipping insertion in model container [2021-12-15 22:42:31,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:42:31" (3/3) ... [2021-12-15 22:42:31,607 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label40.c [2021-12-15 22:42:31,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:42:31,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:42:31,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:42:31,647 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 22:42:31,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:42:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 22:42:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 22:42:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:31,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:42:31,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-12-15 22:42:31,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:31,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317841304] [2021-12-15 22:42:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:31,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:31,787 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 22:42:31,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:31,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317841304] [2021-12-15 22:42:31,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317841304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:31,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:31,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:42:31,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426000812] [2021-12-15 22:42:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:31,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:31,813 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 22:42:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:34,443 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 22:42:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:34,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-15 22:42:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:34,460 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 22:42:34,460 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 22:42:34,465 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 22:42:34,467 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 825 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:34,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:42:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 22:42:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 22:42:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 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 22:42:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-12-15 22:42:34,565 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 9 [2021-12-15 22:42:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:34,565 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-12-15 22:42:34,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 22:42:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-12-15 22:42:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 22:42:34,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:34,567 INFO L514 BasicCegarLoop]: trace histogram [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 22:42:34,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:42:34,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1477295509, now seen corresponding path program 1 times [2021-12-15 22:42:34,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:34,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686175815] [2021-12-15 22:42:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:34,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:34,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:34,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686175815] [2021-12-15 22:42:34,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686175815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:42:34,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718667174] [2021-12-15 22:42:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:34,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:42:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:42:34,735 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 22:42:34,740 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 22:42:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:42:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:42:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:34,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:42:34,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718667174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:34,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:42:34,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:42:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277757351] [2021-12-15 22:42:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:34,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:34,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:42:34,948 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 22:42:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:37,811 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-12-15 22:42:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-15 22:42:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:37,821 INFO L225 Difference]: With dead ends: 4512 [2021-12-15 22:42:37,821 INFO L226 Difference]: Without dead ends: 3008 [2021-12-15 22:42:37,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:42:37,824 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 791 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:37,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 475 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:42:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-15 22:42:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-15 22:42:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4253408713002993) internal successors, (4286), 3007 states have internal predecessors, (4286), 0 states have call successors, (0), 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 22:42:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4286 transitions. [2021-12-15 22:42:37,869 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4286 transitions. Word has length 80 [2021-12-15 22:42:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:37,870 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4286 transitions. [2021-12-15 22:42:37,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 22:42:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4286 transitions. [2021-12-15 22:42:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 22:42:37,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:37,872 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:42:37,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:42:38,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:42:38,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 567104949, now seen corresponding path program 1 times [2021-12-15 22:42:38,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:38,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992895726] [2021-12-15 22:42:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:38,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:38,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992895726] [2021-12-15 22:42:38,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992895726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:38,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:38,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:38,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202872561] [2021-12-15 22:42:38,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:38,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:42:38,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:42:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:42:38,252 INFO L87 Difference]: Start difference. First operand 3008 states and 4286 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 22:42:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:40,587 INFO L93 Difference]: Finished difference Result 6781 states and 9427 transitions. [2021-12-15 22:42:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:42:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-15 22:42:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:40,598 INFO L225 Difference]: With dead ends: 6781 [2021-12-15 22:42:40,598 INFO L226 Difference]: Without dead ends: 3775 [2021-12-15 22:42:40,602 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 22:42:40,606 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:40,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:42:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-12-15 22:42:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3759. [2021-12-15 22:42:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3419372006386376) internal successors, (5043), 3758 states have internal predecessors, (5043), 0 states have call successors, (0), 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 22:42:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5043 transitions. [2021-12-15 22:42:40,660 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5043 transitions. Word has length 84 [2021-12-15 22:42:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:40,661 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5043 transitions. [2021-12-15 22:42:40,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 22:42:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5043 transitions. [2021-12-15 22:42:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-15 22:42:40,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:40,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:42:40,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:42:40,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 689800323, now seen corresponding path program 1 times [2021-12-15 22:42:40,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105764682] [2021-12-15 22:42:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:40,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:40,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105764682] [2021-12-15 22:42:40,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105764682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:40,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:40,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:40,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426483007] [2021-12-15 22:42:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:40,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:42:40,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:42:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:42:40,790 INFO L87 Difference]: Start difference. First operand 3759 states and 5043 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 22:42:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:43,398 INFO L93 Difference]: Finished difference Result 8304 states and 11184 transitions. [2021-12-15 22:42:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:42:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-12-15 22:42:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:43,413 INFO L225 Difference]: With dead ends: 8304 [2021-12-15 22:42:43,414 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 22:42:43,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:42:43,420 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:43,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:42:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 22:42:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 22:42:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2543726235741446) internal successors, (6598), 5260 states have internal predecessors, (6598), 0 states have call successors, (0), 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 22:42:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6598 transitions. [2021-12-15 22:42:43,486 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6598 transitions. Word has length 155 [2021-12-15 22:42:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:43,486 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6598 transitions. [2021-12-15 22:42:43,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 22:42:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6598 transitions. [2021-12-15 22:42:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-15 22:42:43,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:43,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:42:43,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1595450319, now seen corresponding path program 1 times [2021-12-15 22:42:43,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:43,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858912477] [2021-12-15 22:42:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:43,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:43,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858912477] [2021-12-15 22:42:43,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858912477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:43,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:43,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:43,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413208778] [2021-12-15 22:42:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:43,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:43,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:43,628 INFO L87 Difference]: Start difference. First operand 5261 states and 6598 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:42:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:46,020 INFO L93 Difference]: Finished difference Result 14275 states and 18277 transitions. [2021-12-15 22:42:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-12-15 22:42:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:46,045 INFO L225 Difference]: With dead ends: 14275 [2021-12-15 22:42:46,045 INFO L226 Difference]: Without dead ends: 9767 [2021-12-15 22:42:46,050 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 22:42:46,050 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:46,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1247 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:42:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-15 22:42:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-15 22:42:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2335654310874462) internal successors, (12047), 9766 states have internal predecessors, (12047), 0 states have call successors, (0), 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 22:42:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12047 transitions. [2021-12-15 22:42:46,179 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12047 transitions. Word has length 222 [2021-12-15 22:42:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12047 transitions. [2021-12-15 22:42:46,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:42:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12047 transitions. [2021-12-15 22:42:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 22:42:46,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:46,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:46,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:42:46,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1145522442, now seen corresponding path program 1 times [2021-12-15 22:42:46,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878110444] [2021-12-15 22:42:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:46,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 22:42:46,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878110444] [2021-12-15 22:42:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878110444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:46,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:46,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:42:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72550496] [2021-12-15 22:42:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:46,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:46,295 INFO L87 Difference]: Start difference. First operand 9767 states and 12047 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 22:42:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:48,274 INFO L93 Difference]: Finished difference Result 27042 states and 33829 transitions. [2021-12-15 22:42:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 224 [2021-12-15 22:42:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:48,314 INFO L225 Difference]: With dead ends: 27042 [2021-12-15 22:42:48,315 INFO L226 Difference]: Without dead ends: 18028 [2021-12-15 22:42:48,326 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 22:42:48,327 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:48,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:42:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-12-15 22:42:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 15775. [2021-12-15 22:42:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.191390896411817) internal successors, (18793), 15774 states have internal predecessors, (18793), 0 states have call successors, (0), 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 22:42:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18793 transitions. [2021-12-15 22:42:48,580 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18793 transitions. Word has length 224 [2021-12-15 22:42:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:48,580 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 18793 transitions. [2021-12-15 22:42:48,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 22:42:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18793 transitions. [2021-12-15 22:42:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-15 22:42:48,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:48,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:48,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:42:48,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1275247995, now seen corresponding path program 1 times [2021-12-15 22:42:48,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512390665] [2021-12-15 22:42:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:48,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:42:48,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512390665] [2021-12-15 22:42:48,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512390665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:48,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:48,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:48,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371123770] [2021-12-15 22:42:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:48,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:48,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:48,667 INFO L87 Difference]: Start difference. First operand 15775 states and 18793 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 22:42:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:51,137 INFO L93 Difference]: Finished difference Result 38307 states and 46119 transitions. [2021-12-15 22:42:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-12-15 22:42:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:51,222 INFO L225 Difference]: With dead ends: 38307 [2021-12-15 22:42:51,235 INFO L226 Difference]: Without dead ends: 23285 [2021-12-15 22:42:51,267 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 22:42:51,268 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 709 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:51,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 1094 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:42:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23285 states. [2021-12-15 22:42:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23285 to 23285. [2021-12-15 22:42:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.1843755368493385) internal successors, (27577), 23284 states have internal predecessors, (27577), 0 states have call successors, (0), 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 22:42:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 27577 transitions. [2021-12-15 22:42:51,500 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 27577 transitions. Word has length 226 [2021-12-15 22:42:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:51,501 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 27577 transitions. [2021-12-15 22:42:51,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 22:42:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 27577 transitions. [2021-12-15 22:42:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-15 22:42:51,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:51,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:51,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:42:51,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1886432579, now seen corresponding path program 1 times [2021-12-15 22:42:51,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416616274] [2021-12-15 22:42:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 22:42:51,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416616274] [2021-12-15 22:42:51,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416616274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:51,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:51,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:42:51,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749253382] [2021-12-15 22:42:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:51,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:51,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:51,669 INFO L87 Difference]: Start difference. First operand 23285 states and 27577 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 22:42:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:54,217 INFO L93 Difference]: Finished difference Result 61590 states and 74026 transitions. [2021-12-15 22:42:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 231 [2021-12-15 22:42:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:54,285 INFO L225 Difference]: With dead ends: 61590 [2021-12-15 22:42:54,286 INFO L226 Difference]: Without dead ends: 39058 [2021-12-15 22:42:54,311 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 22:42:54,311 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:54,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:42:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39058 states. [2021-12-15 22:42:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39058 to 37554. [2021-12-15 22:42:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37554 states, 37553 states have (on average 1.1628365243788779) internal successors, (43668), 37553 states have internal predecessors, (43668), 0 states have call successors, (0), 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 22:42:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37554 states to 37554 states and 43668 transitions. [2021-12-15 22:42:55,003 INFO L78 Accepts]: Start accepts. Automaton has 37554 states and 43668 transitions. Word has length 231 [2021-12-15 22:42:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:55,004 INFO L470 AbstractCegarLoop]: Abstraction has 37554 states and 43668 transitions. [2021-12-15 22:42:55,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 22:42:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 37554 states and 43668 transitions. [2021-12-15 22:42:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-15 22:42:55,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:55,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:55,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:42:55,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1378755422, now seen corresponding path program 1 times [2021-12-15 22:42:55,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:55,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326862266] [2021-12-15 22:42:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:55,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 22:42:55,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:55,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326862266] [2021-12-15 22:42:55,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326862266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:55,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:55,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:55,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881850541] [2021-12-15 22:42:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:55,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:55,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:55,150 INFO L87 Difference]: Start difference. First operand 37554 states and 43668 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:42:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:57,897 INFO L93 Difference]: Finished difference Result 95383 states and 112388 transitions. [2021-12-15 22:42:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 240 [2021-12-15 22:42:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:57,971 INFO L225 Difference]: With dead ends: 95383 [2021-12-15 22:42:57,972 INFO L226 Difference]: Without dead ends: 58582 [2021-12-15 22:42:57,993 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 22:42:57,996 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 766 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:57,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1216 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:42:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58582 states. [2021-12-15 22:42:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58582 to 58582. [2021-12-15 22:42:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58582 states, 58581 states have (on average 1.1296836858367048) internal successors, (66178), 58581 states have internal predecessors, (66178), 0 states have call successors, (0), 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 22:42:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58582 states to 58582 states and 66178 transitions. [2021-12-15 22:42:58,860 INFO L78 Accepts]: Start accepts. Automaton has 58582 states and 66178 transitions. Word has length 240 [2021-12-15 22:42:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:58,863 INFO L470 AbstractCegarLoop]: Abstraction has 58582 states and 66178 transitions. [2021-12-15 22:42:58,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:42:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 58582 states and 66178 transitions. [2021-12-15 22:42:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-15 22:42:58,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:58,866 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:42:58,866 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1437229485, now seen corresponding path program 1 times [2021-12-15 22:42:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4381559] [2021-12-15 22:42:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:58,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 22:42:58,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:58,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4381559] [2021-12-15 22:42:58,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4381559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:58,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:58,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:58,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358826581] [2021-12-15 22:42:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:58,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:58,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:58,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:58,956 INFO L87 Difference]: Start difference. First operand 58582 states and 66178 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:43:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:01,529 INFO L93 Difference]: Finished difference Result 132933 states and 152231 transitions. [2021-12-15 22:43:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 271 [2021-12-15 22:43:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:01,612 INFO L225 Difference]: With dead ends: 132933 [2021-12-15 22:43:01,612 INFO L226 Difference]: Without dead ends: 75104 [2021-12-15 22:43:01,637 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 22:43:01,637 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 760 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:01,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1278 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:43:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75104 states. [2021-12-15 22:43:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75104 to 75104. [2021-12-15 22:43:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75104 states, 75103 states have (on average 1.1126719305487132) internal successors, (83565), 75103 states have internal predecessors, (83565), 0 states have call successors, (0), 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 22:43:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75104 states to 75104 states and 83565 transitions. [2021-12-15 22:43:02,525 INFO L78 Accepts]: Start accepts. Automaton has 75104 states and 83565 transitions. Word has length 271 [2021-12-15 22:43:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:02,526 INFO L470 AbstractCegarLoop]: Abstraction has 75104 states and 83565 transitions. [2021-12-15 22:43:02,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:43:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 75104 states and 83565 transitions. [2021-12-15 22:43:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 22:43:02,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:02,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:43:02,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:43:02,535 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1710903596, now seen corresponding path program 1 times [2021-12-15 22:43:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:02,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753506560] [2021-12-15 22:43:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:02,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 22:43:02,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:02,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753506560] [2021-12-15 22:43:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753506560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:02,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:43:02,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:43:02,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15106399] [2021-12-15 22:43:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:02,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:43:02,633 INFO L87 Difference]: Start difference. First operand 75104 states and 83565 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 22:43:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:05,309 INFO L93 Difference]: Finished difference Result 162222 states and 180340 transitions. [2021-12-15 22:43:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 340 [2021-12-15 22:43:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:05,416 INFO L225 Difference]: With dead ends: 162222 [2021-12-15 22:43:05,416 INFO L226 Difference]: Without dead ends: 87871 [2021-12-15 22:43:05,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 22:43:05,460 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 862 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:05,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 906 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:43:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87871 states. [2021-12-15 22:43:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87871 to 82614. [2021-12-15 22:43:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82614 states, 82613 states have (on average 1.0998147991236247) internal successors, (90859), 82613 states have internal predecessors, (90859), 0 states have call successors, (0), 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 22:43:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82614 states to 82614 states and 90859 transitions. [2021-12-15 22:43:06,500 INFO L78 Accepts]: Start accepts. Automaton has 82614 states and 90859 transitions. Word has length 340 [2021-12-15 22:43:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:06,501 INFO L470 AbstractCegarLoop]: Abstraction has 82614 states and 90859 transitions. [2021-12-15 22:43:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 22:43:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 82614 states and 90859 transitions. [2021-12-15 22:43:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-15 22:43:06,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:06,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:43:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:43:06,506 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -195598637, now seen corresponding path program 1 times [2021-12-15 22:43:06,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304171270] [2021-12-15 22:43:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:06,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:43:06,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304171270] [2021-12-15 22:43:06,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304171270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:06,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:43:06,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:43:06,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083100243] [2021-12-15 22:43:06,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:06,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:06,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:43:06,605 INFO L87 Difference]: Start difference. First operand 82614 states and 90859 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:43:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:09,610 INFO L93 Difference]: Finished difference Result 167479 states and 184032 transitions. [2021-12-15 22:43:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 377 [2021-12-15 22:43:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:09,705 INFO L225 Difference]: With dead ends: 167479 [2021-12-15 22:43:09,705 INFO L226 Difference]: Without dead ends: 85618 [2021-12-15 22:43:09,737 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 22:43:09,738 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 661 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:09,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 230 Invalid, 2955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:43:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85618 states. [2021-12-15 22:43:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85618 to 78108. [2021-12-15 22:43:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78108 states, 78107 states have (on average 1.0985827134571806) internal successors, (85807), 78107 states have internal predecessors, (85807), 0 states have call successors, (0), 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 22:43:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78108 states to 78108 states and 85807 transitions. [2021-12-15 22:43:10,756 INFO L78 Accepts]: Start accepts. Automaton has 78108 states and 85807 transitions. Word has length 377 [2021-12-15 22:43:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:10,756 INFO L470 AbstractCegarLoop]: Abstraction has 78108 states and 85807 transitions. [2021-12-15 22:43:10,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:43:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78108 states and 85807 transitions. [2021-12-15 22:43:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-15 22:43:10,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:10,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:43:10,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:43:10,762 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1610302675, now seen corresponding path program 1 times [2021-12-15 22:43:10,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432333003] [2021-12-15 22:43:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:10,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 22:43:10,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432333003] [2021-12-15 22:43:10,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432333003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:10,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:43:10,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:43:10,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408700503] [2021-12-15 22:43:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:10,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:10,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:43:10,864 INFO L87 Difference]: Start difference. First operand 78108 states and 85807 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:43:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:13,836 INFO L93 Difference]: Finished difference Result 188507 states and 208980 transitions. [2021-12-15 22:43:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2021-12-15 22:43:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:14,201 INFO L225 Difference]: With dead ends: 188507 [2021-12-15 22:43:14,202 INFO L226 Difference]: Without dead ends: 111152 [2021-12-15 22:43:14,261 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 22:43:14,262 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 655 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:14,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1291 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:43:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111152 states. [2021-12-15 22:43:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111152 to 105144. [2021-12-15 22:43:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105144 states, 105143 states have (on average 1.0928830259741495) internal successors, (114909), 105143 states have internal predecessors, (114909), 0 states have call successors, (0), 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 22:43:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105144 states to 105144 states and 114909 transitions. [2021-12-15 22:43:15,730 INFO L78 Accepts]: Start accepts. Automaton has 105144 states and 114909 transitions. Word has length 388 [2021-12-15 22:43:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:15,733 INFO L470 AbstractCegarLoop]: Abstraction has 105144 states and 114909 transitions. [2021-12-15 22:43:15,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:43:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 105144 states and 114909 transitions. [2021-12-15 22:43:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-12-15 22:43:15,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:15,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:43:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:43:15,739 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1662806843, now seen corresponding path program 1 times [2021-12-15 22:43:15,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808984315] [2021-12-15 22:43:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-15 22:43:15,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:15,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808984315] [2021-12-15 22:43:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808984315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:15,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:43:15,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:43:15,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216106731] [2021-12-15 22:43:15,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:15,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:15,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:43:15,864 INFO L87 Difference]: Start difference. First operand 105144 states and 114909 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:43:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:18,626 INFO L93 Difference]: Finished difference Result 211788 states and 231369 transitions. [2021-12-15 22:43:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 397 [2021-12-15 22:43:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:18,744 INFO L225 Difference]: With dead ends: 211788 [2021-12-15 22:43:18,744 INFO L226 Difference]: Without dead ends: 107397 [2021-12-15 22:43:18,785 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 22:43:18,786 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 761 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:18,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1006 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:43:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107397 states. [2021-12-15 22:43:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107397 to 102140. [2021-12-15 22:43:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102140 states, 102139 states have (on average 1.0800575686074858) internal successors, (110316), 102139 states have internal predecessors, (110316), 0 states have call successors, (0), 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 22:43:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102140 states to 102140 states and 110316 transitions. [2021-12-15 22:43:20,116 INFO L78 Accepts]: Start accepts. Automaton has 102140 states and 110316 transitions. Word has length 397 [2021-12-15 22:43:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:20,116 INFO L470 AbstractCegarLoop]: Abstraction has 102140 states and 110316 transitions. [2021-12-15 22:43:20,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:43:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 102140 states and 110316 transitions. [2021-12-15 22:43:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-12-15 22:43:20,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:20,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:43:20,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:43:20,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash -405089410, now seen corresponding path program 1 times [2021-12-15 22:43:20,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:20,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967394692] [2021-12-15 22:43:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:20,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 61 proven. 257 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 22:43:20,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967394692] [2021-12-15 22:43:20,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967394692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:43:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794061728] [2021-12-15 22:43:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:20,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:43:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:43:20,240 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 22:43:20,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:43:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:43:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:43:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-15 22:43:21,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:43:21,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794061728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:21,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:43:21,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:43:21,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464296719] [2021-12-15 22:43:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:21,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:21,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:43:21,078 INFO L87 Difference]: Start difference. First operand 102140 states and 110316 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:43:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:23,725 INFO L93 Difference]: Finished difference Result 248587 states and 270011 transitions. [2021-12-15 22:43:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 415 [2021-12-15 22:43:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:23,913 INFO L225 Difference]: With dead ends: 248587 [2021-12-15 22:43:23,913 INFO L226 Difference]: Without dead ends: 147200 [2021-12-15 22:43:23,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:43:23,987 INFO L933 BasicCegarLoop]: 1295 mSDtfsCounter, 615 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:23,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1303 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:43:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147200 states. [2021-12-15 22:43:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147200 to 138188. [2021-12-15 22:43:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138188 states, 138187 states have (on average 1.0738853871927172) internal successors, (148397), 138187 states have internal predecessors, (148397), 0 states have call successors, (0), 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 22:43:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138188 states to 138188 states and 148397 transitions. [2021-12-15 22:43:25,675 INFO L78 Accepts]: Start accepts. Automaton has 138188 states and 148397 transitions. Word has length 415 [2021-12-15 22:43:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:43:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 138188 states and 148397 transitions. [2021-12-15 22:43:25,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:43:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 138188 states and 148397 transitions. [2021-12-15 22:43:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-12-15 22:43:25,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:43:25,684 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2021-12-15 22:43:25,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:43:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 22:43:25,900 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:43:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:43:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2064982254, now seen corresponding path program 1 times [2021-12-15 22:43:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:43:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747553136] [2021-12-15 22:43:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:43:25,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:43:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:43:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-15 22:43:26,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:43:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747553136] [2021-12-15 22:43:26,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747553136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:43:26,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:43:26,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:43:26,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574077038] [2021-12-15 22:43:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:43:26,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:43:26,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:43:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:43:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:43:26,311 INFO L87 Difference]: Start difference. First operand 138188 states and 148397 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 22:43:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:43:29,310 INFO L93 Difference]: Finished difference Result 295149 states and 316918 transitions. [2021-12-15 22:43:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:43:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 506 [2021-12-15 22:43:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:43:29,493 INFO L225 Difference]: With dead ends: 295149 [2021-12-15 22:43:29,493 INFO L226 Difference]: Without dead ends: 157714 [2021-12-15 22:43:29,546 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 22:43:29,546 INFO L933 BasicCegarLoop]: 1131 mSDtfsCounter, 854 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:43:29,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1139 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:43:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157714 states.