./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.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 77af8780d2ec99ad0d03b475aa25db67a7ba0a218594f51cddbe35460cd2b670 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:18:33,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:18:33,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:18:33,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:18:33,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:18:33,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:18:33,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:18:33,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:18:33,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:18:33,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:18:33,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:18:33,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:18:33,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:18:33,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:18:33,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:18:33,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:18:33,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:18:33,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:18:33,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:18:33,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:18:33,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:18:33,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:18:33,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:18:33,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:18:33,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:18:33,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:18:33,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:18:33,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:18:33,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:18:33,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:18:33,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:18:33,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:18:33,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:18:33,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:18:33,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:18:33,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:18:33,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:18:33,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:18:33,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:18:33,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:18:33,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:18:33,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:18:33,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:18:33,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:18:33,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:18:33,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:18:33,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:18:33,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:18:33,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:18:33,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:18:33,520 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:18:33,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:18:33,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:18:33,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:18:33,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:18:33,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:18:33,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:18:33,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:18:33,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:18:33,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:18:33,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:18:33,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:33,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:18:33,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:18:33,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:18:33,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:18:33,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77af8780d2ec99ad0d03b475aa25db67a7ba0a218594f51cddbe35460cd2b670 [2021-12-15 11:18:33,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:18:33,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:18:33,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:18:33,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:18:33,772 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:18:33,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-12-15 11:18:33,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d70e6ab/1528ba2de7cb4cdaa3146e47e9c80ce6/FLAG09b1f617c [2021-12-15 11:18:34,279 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:18:34,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-12-15 11:18:34,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d70e6ab/1528ba2de7cb4cdaa3146e47e9c80ce6/FLAG09b1f617c [2021-12-15 11:18:34,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d70e6ab/1528ba2de7cb4cdaa3146e47e9c80ce6 [2021-12-15 11:18:34,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:18:34,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:18:34,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:34,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:18:34,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:18:34,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69941f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34, skipping insertion in model container [2021-12-15 11:18:34,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:18:34,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:18:34,617 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/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2021-12-15 11:18:34,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:34,631 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:18:34,725 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/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2021-12-15 11:18:34,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:34,748 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:18:34,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34 WrapperNode [2021-12-15 11:18:34,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:34,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:34,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:18:34,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:18:34,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,821 INFO L137 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 983 [2021-12-15 11:18:34,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:34,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:18:34,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:18:34,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:18:34,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:18:34,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:18:34,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:18:34,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:18:34,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (1/1) ... [2021-12-15 11:18:34,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:18:34,941 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 11:18:34,957 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 11:18:34,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:18:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:18:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:18:34,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:18:35,112 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:18:35,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:18:35,915 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:18:35,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:18:35,929 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:18:35,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:35 BoogieIcfgContainer [2021-12-15 11:18:35,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:18:35,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:18:35,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:18:35,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:18:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:18:34" (1/3) ... [2021-12-15 11:18:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d40b4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:35, skipping insertion in model container [2021-12-15 11:18:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:34" (2/3) ... [2021-12-15 11:18:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d40b4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:35, skipping insertion in model container [2021-12-15 11:18:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:35" (3/3) ... [2021-12-15 11:18:35,938 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-12-15 11:18:35,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:18:35,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:18:35,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:18:35,991 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 11:18:35,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:18:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 11:18:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:18:36,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:36,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:36,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1445812, now seen corresponding path program 1 times [2021-12-15 11:18:36,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270740881] [2021-12-15 11:18:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:36,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:36,266 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 11:18:36,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:36,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270740881] [2021-12-15 11:18:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270740881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:36,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:36,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:18:36,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408567111] [2021-12-15 11:18:36,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:18:36,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:18:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:36,301 INFO L87 Difference]: Start difference. First operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 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 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:18:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:36,345 INFO L93 Difference]: Finished difference Result 441 states and 778 transitions. [2021-12-15 11:18:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:18:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 11:18:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:36,356 INFO L225 Difference]: With dead ends: 441 [2021-12-15 11:18:36,356 INFO L226 Difference]: Without dead ends: 308 [2021-12-15 11:18:36,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:36,360 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:36,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-15 11:18:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-12-15 11:18:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.794788273615635) internal successors, (551), 307 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 11:18:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 551 transitions. [2021-12-15 11:18:36,418 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 551 transitions. Word has length 77 [2021-12-15 11:18:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:36,442 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 551 transitions. [2021-12-15 11:18:36,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:18:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 551 transitions. [2021-12-15 11:18:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:18:36,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:36,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:36,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:18:36,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -135459318, now seen corresponding path program 1 times [2021-12-15 11:18:36,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918283335] [2021-12-15 11:18:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:36,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:36,568 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 11:18:36,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918283335] [2021-12-15 11:18:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918283335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:36,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:36,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868311323] [2021-12-15 11:18:36,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:36,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:36,572 INFO L87 Difference]: Start difference. First operand 308 states and 551 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:18:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:36,667 INFO L93 Difference]: Finished difference Result 436 states and 768 transitions. [2021-12-15 11:18:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 11:18:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:36,670 INFO L225 Difference]: With dead ends: 436 [2021-12-15 11:18:36,670 INFO L226 Difference]: Without dead ends: 308 [2021-12-15 11:18:36,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:36,672 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 3 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:36,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2159 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-15 11:18:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-12-15 11:18:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6840390879478828) internal successors, (517), 307 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 11:18:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 517 transitions. [2021-12-15 11:18:36,685 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 517 transitions. Word has length 77 [2021-12-15 11:18:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:36,685 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 517 transitions. [2021-12-15 11:18:36,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 11:18:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 517 transitions. [2021-12-15 11:18:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 11:18:36,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:36,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:36,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:18:36,688 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1547820362, now seen corresponding path program 1 times [2021-12-15 11:18:36,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256242458] [2021-12-15 11:18:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:36,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:36,779 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 11:18:36,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256242458] [2021-12-15 11:18:36,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256242458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:36,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:36,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:36,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233928882] [2021-12-15 11:18:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:36,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:36,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:36,783 INFO L87 Difference]: Start difference. First operand 308 states and 517 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 11:18:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:36,827 INFO L93 Difference]: Finished difference Result 544 states and 921 transitions. [2021-12-15 11:18:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 11:18:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:36,833 INFO L225 Difference]: With dead ends: 544 [2021-12-15 11:18:36,833 INFO L226 Difference]: Without dead ends: 420 [2021-12-15 11:18:36,836 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 11:18:36,840 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 183 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:36,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 990 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-15 11:18:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2021-12-15 11:18:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.683453237410072) internal successors, (702), 417 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 11:18:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 702 transitions. [2021-12-15 11:18:36,858 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 702 transitions. Word has length 110 [2021-12-15 11:18:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 702 transitions. [2021-12-15 11:18:36,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 11:18:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 702 transitions. [2021-12-15 11:18:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 11:18:36,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:36,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:36,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:18:36,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2146366683, now seen corresponding path program 1 times [2021-12-15 11:18:36,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:36,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027406712] [2021-12-15 11:18:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:36,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:36,970 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 11:18:36,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027406712] [2021-12-15 11:18:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027406712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:36,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:36,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:36,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276782625] [2021-12-15 11:18:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:36,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:36,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:36,974 INFO L87 Difference]: Start difference. First operand 418 states and 702 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 11:18:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:37,009 INFO L93 Difference]: Finished difference Result 866 states and 1462 transitions. [2021-12-15 11:18:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-15 11:18:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:37,013 INFO L225 Difference]: With dead ends: 866 [2021-12-15 11:18:37,013 INFO L226 Difference]: Without dead ends: 632 [2021-12-15 11:18:37,016 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 11:18:37,027 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 184 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:37,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 998 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-15 11:18:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2021-12-15 11:18:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 1.6868044515103338) internal successors, (1061), 629 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states 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 11:18:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1061 transitions. [2021-12-15 11:18:37,053 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1061 transitions. Word has length 113 [2021-12-15 11:18:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,054 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1061 transitions. [2021-12-15 11:18:37,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 11:18:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1061 transitions. [2021-12-15 11:18:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 11:18:37,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:37,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:18:37,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash 767519678, now seen corresponding path program 1 times [2021-12-15 11:18:37,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198637882] [2021-12-15 11:18:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:37,134 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 11:18:37,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198637882] [2021-12-15 11:18:37,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198637882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:37,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:37,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:37,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720498926] [2021-12-15 11:18:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:37,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:37,138 INFO L87 Difference]: Start difference. First operand 630 states and 1061 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:37,173 INFO L93 Difference]: Finished difference Result 1482 states and 2503 transitions. [2021-12-15 11:18:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 11:18:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:37,178 INFO L225 Difference]: With dead ends: 1482 [2021-12-15 11:18:37,178 INFO L226 Difference]: Without dead ends: 1036 [2021-12-15 11:18:37,180 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 11:18:37,180 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 177 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:37,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 999 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-15 11:18:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1034. [2021-12-15 11:18:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.685382381413359) internal successors, (1741), 1033 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states 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 11:18:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1741 transitions. [2021-12-15 11:18:37,211 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1741 transitions. Word has length 116 [2021-12-15 11:18:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,212 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1741 transitions. [2021-12-15 11:18:37,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1741 transitions. [2021-12-15 11:18:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 11:18:37,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:37,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:18:37,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1185652755, now seen corresponding path program 1 times [2021-12-15 11:18:37,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757334370] [2021-12-15 11:18:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:37,313 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 11:18:37,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:37,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757334370] [2021-12-15 11:18:37,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757334370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:37,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:37,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:37,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747341724] [2021-12-15 11:18:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:37,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:37,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:37,315 INFO L87 Difference]: Start difference. First operand 1034 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 11:18:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:37,352 INFO L93 Difference]: Finished difference Result 2654 states and 4471 transitions. [2021-12-15 11:18:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-15 11:18:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:37,360 INFO L225 Difference]: With dead ends: 2654 [2021-12-15 11:18:37,360 INFO L226 Difference]: Without dead ends: 1804 [2021-12-15 11:18:37,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:37,364 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 170 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:37,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1000 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-12-15 11:18:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1802. [2021-12-15 11:18:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 1.6796224319822322) internal successors, (3025), 1801 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states 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 11:18:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3025 transitions. [2021-12-15 11:18:37,418 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3025 transitions. Word has length 119 [2021-12-15 11:18:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,418 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 3025 transitions. [2021-12-15 11:18:37,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 11:18:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3025 transitions. [2021-12-15 11:18:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:18:37,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:18:37,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1443494714, now seen corresponding path program 1 times [2021-12-15 11:18:37,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673558265] [2021-12-15 11:18:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:37,510 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 11:18:37,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:37,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673558265] [2021-12-15 11:18:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673558265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:37,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:37,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:18:37,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723249078] [2021-12-15 11:18:37,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:37,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:18:37,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:18:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:37,512 INFO L87 Difference]: Start difference. First operand 1802 states and 3025 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:37,764 INFO L93 Difference]: Finished difference Result 9338 states and 15809 transitions. [2021-12-15 11:18:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 11:18:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-15 11:18:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:37,790 INFO L225 Difference]: With dead ends: 9338 [2021-12-15 11:18:37,790 INFO L226 Difference]: Without dead ends: 7720 [2021-12-15 11:18:37,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:18:37,799 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 1917 mSDsluCounter, 3682 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 4192 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:37,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1917 Valid, 4192 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-12-15 11:18:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 3310. [2021-12-15 11:18:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.6796615291628891) internal successors, (5558), 3309 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states 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 11:18:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 5558 transitions. [2021-12-15 11:18:37,932 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 5558 transitions. Word has length 122 [2021-12-15 11:18:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,933 INFO L470 AbstractCegarLoop]: Abstraction has 3310 states and 5558 transitions. [2021-12-15 11:18:37,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 5558 transitions. [2021-12-15 11:18:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-15 11:18:37,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:37,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:18:37,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 401697485, now seen corresponding path program 1 times [2021-12-15 11:18:37,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372738021] [2021-12-15 11:18:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:38,010 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 11:18:38,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372738021] [2021-12-15 11:18:38,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372738021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:38,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:38,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:38,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794017829] [2021-12-15 11:18:38,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:38,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:38,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:38,012 INFO L87 Difference]: Start difference. First operand 3310 states and 5558 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 11:18:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:38,137 INFO L93 Difference]: Finished difference Result 9680 states and 16344 transitions. [2021-12-15 11:18:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-15 11:18:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:38,159 INFO L225 Difference]: With dead ends: 9680 [2021-12-15 11:18:38,159 INFO L226 Difference]: Without dead ends: 6554 [2021-12-15 11:18:38,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:18:38,163 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 619 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:38,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 1535 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2021-12-15 11:18:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 4915. [2021-12-15 11:18:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 1.6815221815221815) internal successors, (8263), 4914 states have internal predecessors, (8263), 0 states have call successors, (0), 0 states 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 11:18:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 8263 transitions. [2021-12-15 11:18:38,318 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 8263 transitions. Word has length 123 [2021-12-15 11:18:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:38,319 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 8263 transitions. [2021-12-15 11:18:38,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 11:18:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 8263 transitions. [2021-12-15 11:18:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:18:38,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:38,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:38,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:18:38,325 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1728148576, now seen corresponding path program 1 times [2021-12-15 11:18:38,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135832457] [2021-12-15 11:18:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:38,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:38,378 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 11:18:38,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:38,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135832457] [2021-12-15 11:18:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135832457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:38,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:38,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917008771] [2021-12-15 11:18:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:38,381 INFO L87 Difference]: Start difference. First operand 4915 states and 8263 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:38,526 INFO L93 Difference]: Finished difference Result 10826 states and 18276 transitions. [2021-12-15 11:18:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:38,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-15 11:18:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:38,560 INFO L225 Difference]: With dead ends: 10826 [2021-12-15 11:18:38,560 INFO L226 Difference]: Without dead ends: 7507 [2021-12-15 11:18:38,566 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 11:18:38,567 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 192 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:38,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1151 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2021-12-15 11:18:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 7505. [2021-12-15 11:18:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 7504 states have (on average 1.6793710021321961) internal successors, (12602), 7504 states have internal predecessors, (12602), 0 states have call successors, (0), 0 states 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 11:18:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 12602 transitions. [2021-12-15 11:18:38,759 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 12602 transitions. Word has length 124 [2021-12-15 11:18:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:38,759 INFO L470 AbstractCegarLoop]: Abstraction has 7505 states and 12602 transitions. [2021-12-15 11:18:38,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 12602 transitions. [2021-12-15 11:18:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:18:38,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:38,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:38,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:18:38,762 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -404829920, now seen corresponding path program 1 times [2021-12-15 11:18:38,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:38,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962425130] [2021-12-15 11:18:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:38,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:38,804 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 11:18:38,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962425130] [2021-12-15 11:18:38,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962425130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:38,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:38,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:38,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943978736] [2021-12-15 11:18:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:38,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:38,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:38,806 INFO L87 Difference]: Start difference. First operand 7505 states and 12602 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:38,960 INFO L93 Difference]: Finished difference Result 14548 states and 24441 transitions. [2021-12-15 11:18:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-15 11:18:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:38,981 INFO L225 Difference]: With dead ends: 14548 [2021-12-15 11:18:38,982 INFO L226 Difference]: Without dead ends: 10570 [2021-12-15 11:18:38,992 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 11:18:38,993 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 178 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:38,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1093 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-12-15 11:18:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10568. [2021-12-15 11:18:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10568 states, 10567 states have (on average 1.6727548026876125) internal successors, (17676), 10567 states have internal predecessors, (17676), 0 states have call successors, (0), 0 states 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 11:18:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10568 states to 10568 states and 17676 transitions. [2021-12-15 11:18:39,265 INFO L78 Accepts]: Start accepts. Automaton has 10568 states and 17676 transitions. Word has length 124 [2021-12-15 11:18:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:39,266 INFO L470 AbstractCegarLoop]: Abstraction has 10568 states and 17676 transitions. [2021-12-15 11:18:39,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10568 states and 17676 transitions. [2021-12-15 11:18:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:18:39,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:39,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:39,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:18:39,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1992868756, now seen corresponding path program 1 times [2021-12-15 11:18:39,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:39,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124331426] [2021-12-15 11:18:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:39,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:39,324 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 11:18:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124331426] [2021-12-15 11:18:39,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124331426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:39,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:39,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:39,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475284077] [2021-12-15 11:18:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:39,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:39,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:39,327 INFO L87 Difference]: Start difference. First operand 10568 states and 17676 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:39,556 INFO L93 Difference]: Finished difference Result 20348 states and 34056 transitions. [2021-12-15 11:18:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-15 11:18:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:39,587 INFO L225 Difference]: With dead ends: 20348 [2021-12-15 11:18:39,587 INFO L226 Difference]: Without dead ends: 14762 [2021-12-15 11:18:39,600 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 11:18:39,601 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 171 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:39,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1069 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14762 states. [2021-12-15 11:18:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14762 to 14760. [2021-12-15 11:18:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14760 states, 14759 states have (on average 1.6654922420218172) internal successors, (24581), 14759 states have internal predecessors, (24581), 0 states have call successors, (0), 0 states 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 11:18:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14760 states to 14760 states and 24581 transitions. [2021-12-15 11:18:40,014 INFO L78 Accepts]: Start accepts. Automaton has 14760 states and 24581 transitions. Word has length 124 [2021-12-15 11:18:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:40,015 INFO L470 AbstractCegarLoop]: Abstraction has 14760 states and 24581 transitions. [2021-12-15 11:18:40,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14760 states and 24581 transitions. [2021-12-15 11:18:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:18:40,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:40,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:40,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:18:40,018 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1937085149, now seen corresponding path program 1 times [2021-12-15 11:18:40,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:40,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972650226] [2021-12-15 11:18:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:40,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:40,079 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 11:18:40,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972650226] [2021-12-15 11:18:40,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972650226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:40,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:40,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:40,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994674949] [2021-12-15 11:18:40,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:40,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:40,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:40,082 INFO L87 Difference]: Start difference. First operand 14760 states and 24581 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:40,555 INFO L93 Difference]: Finished difference Result 44344 states and 74073 transitions. [2021-12-15 11:18:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-15 11:18:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:40,614 INFO L225 Difference]: With dead ends: 44344 [2021-12-15 11:18:40,614 INFO L226 Difference]: Without dead ends: 29865 [2021-12-15 11:18:40,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:18:40,637 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 565 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:40,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1803 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29865 states. [2021-12-15 11:18:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29865 to 22233. [2021-12-15 11:18:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22233 states, 22232 states have (on average 1.661074127383951) internal successors, (36929), 22232 states have internal predecessors, (36929), 0 states have call successors, (0), 0 states 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 11:18:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22233 states to 22233 states and 36929 transitions. [2021-12-15 11:18:41,280 INFO L78 Accepts]: Start accepts. Automaton has 22233 states and 36929 transitions. Word has length 124 [2021-12-15 11:18:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:41,280 INFO L470 AbstractCegarLoop]: Abstraction has 22233 states and 36929 transitions. [2021-12-15 11:18:41,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22233 states and 36929 transitions. [2021-12-15 11:18:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:18:41,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:41,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:41,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:18:41,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1043679724, now seen corresponding path program 1 times [2021-12-15 11:18:41,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:41,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313069172] [2021-12-15 11:18:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:41,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:41,328 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 11:18:41,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313069172] [2021-12-15 11:18:41,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313069172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:41,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:41,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:41,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003854838] [2021-12-15 11:18:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:41,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:41,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:41,331 INFO L87 Difference]: Start difference. First operand 22233 states and 36929 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:41,821 INFO L93 Difference]: Finished difference Result 48596 states and 80705 transitions. [2021-12-15 11:18:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-15 11:18:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:41,902 INFO L225 Difference]: With dead ends: 48596 [2021-12-15 11:18:41,902 INFO L226 Difference]: Without dead ends: 33268 [2021-12-15 11:18:41,925 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 11:18:41,927 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 185 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:41,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1135 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33268 states. [2021-12-15 11:18:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33268 to 33266. [2021-12-15 11:18:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33266 states, 33265 states have (on average 1.6505937171200962) internal successors, (54907), 33265 states have internal predecessors, (54907), 0 states have call successors, (0), 0 states 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 11:18:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33266 states to 33266 states and 54907 transitions. [2021-12-15 11:18:42,708 INFO L78 Accepts]: Start accepts. Automaton has 33266 states and 54907 transitions. Word has length 124 [2021-12-15 11:18:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:42,708 INFO L470 AbstractCegarLoop]: Abstraction has 33266 states and 54907 transitions. [2021-12-15 11:18:42,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:18:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 33266 states and 54907 transitions. [2021-12-15 11:18:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-15 11:18:42,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:42,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:42,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:18:42,710 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1836500476, now seen corresponding path program 1 times [2021-12-15 11:18:42,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:42,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535974272] [2021-12-15 11:18:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:42,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:42,768 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 11:18:42,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535974272] [2021-12-15 11:18:42,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535974272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:42,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:42,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:42,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754956540] [2021-12-15 11:18:42,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:42,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:42,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:42,771 INFO L87 Difference]: Start difference. First operand 33266 states and 54907 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:18:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:43,838 INFO L93 Difference]: Finished difference Result 108174 states and 178725 transitions. [2021-12-15 11:18:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-15 11:18:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:44,024 INFO L225 Difference]: With dead ends: 108174 [2021-12-15 11:18:44,025 INFO L226 Difference]: Without dead ends: 75142 [2021-12-15 11:18:44,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:18:44,069 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 615 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:44,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1679 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75142 states. [2021-12-15 11:18:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75142 to 54061. [2021-12-15 11:18:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54061 states, 54060 states have (on average 1.6434887162412135) internal successors, (88847), 54060 states have internal predecessors, (88847), 0 states have call successors, (0), 0 states 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 11:18:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54061 states to 54061 states and 88847 transitions. [2021-12-15 11:18:45,558 INFO L78 Accepts]: Start accepts. Automaton has 54061 states and 88847 transitions. Word has length 125 [2021-12-15 11:18:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:45,558 INFO L470 AbstractCegarLoop]: Abstraction has 54061 states and 88847 transitions. [2021-12-15 11:18:45,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:18:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 54061 states and 88847 transitions. [2021-12-15 11:18:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 11:18:45,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:45,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:18:45,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1610433780, now seen corresponding path program 1 times [2021-12-15 11:18:45,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998257548] [2021-12-15 11:18:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:45,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:45,621 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 11:18:45,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998257548] [2021-12-15 11:18:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998257548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:45,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:45,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:45,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862019344] [2021-12-15 11:18:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:45,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:45,624 INFO L87 Difference]: Start difference. First operand 54061 states and 88847 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 11:18:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:47,324 INFO L93 Difference]: Finished difference Result 173808 states and 285945 transitions. [2021-12-15 11:18:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-15 11:18:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:47,637 INFO L225 Difference]: With dead ends: 173808 [2021-12-15 11:18:47,637 INFO L226 Difference]: Without dead ends: 119981 [2021-12-15 11:18:47,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:18:47,685 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 613 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:47,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 1681 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119981 states. [2021-12-15 11:18:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119981 to 86796. [2021-12-15 11:18:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86796 states, 86795 states have (on average 1.636580448182499) internal successors, (142047), 86795 states have internal predecessors, (142047), 0 states have call successors, (0), 0 states 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 11:18:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86796 states to 86796 states and 142047 transitions. [2021-12-15 11:18:49,995 INFO L78 Accepts]: Start accepts. Automaton has 86796 states and 142047 transitions. Word has length 126 [2021-12-15 11:18:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:49,995 INFO L470 AbstractCegarLoop]: Abstraction has 86796 states and 142047 transitions. [2021-12-15 11:18:49,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 11:18:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 86796 states and 142047 transitions. [2021-12-15 11:18:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 11:18:49,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:49,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:49,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:18:49,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -777514292, now seen corresponding path program 1 times [2021-12-15 11:18:49,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:49,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182158391] [2021-12-15 11:18:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:49,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:50,118 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 11:18:50,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182158391] [2021-12-15 11:18:50,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182158391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:50,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:50,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:18:50,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70619496] [2021-12-15 11:18:50,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:50,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:18:50,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:18:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:50,121 INFO L87 Difference]: Start difference. First operand 86796 states and 142047 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 11:18:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:51,793 INFO L93 Difference]: Finished difference Result 173360 states and 283714 transitions. [2021-12-15 11:18:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:18:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-15 11:18:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:51,957 INFO L225 Difference]: With dead ends: 173360 [2021-12-15 11:18:51,957 INFO L226 Difference]: Without dead ends: 86798 [2021-12-15 11:18:52,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:52,015 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 501 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:52,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1941 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86798 states. [2021-12-15 11:18:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86798 to 86796. [2021-12-15 11:18:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86796 states, 86795 states have (on average 1.6293795725560227) internal successors, (141422), 86795 states have internal predecessors, (141422), 0 states have call successors, (0), 0 states 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 11:18:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86796 states to 86796 states and 141422 transitions. [2021-12-15 11:18:54,041 INFO L78 Accepts]: Start accepts. Automaton has 86796 states and 141422 transitions. Word has length 128 [2021-12-15 11:18:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:54,041 INFO L470 AbstractCegarLoop]: Abstraction has 86796 states and 141422 transitions. [2021-12-15 11:18:54,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 11:18:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 86796 states and 141422 transitions. [2021-12-15 11:18:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 11:18:54,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:54,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:54,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:18:54,043 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1216965369, now seen corresponding path program 1 times [2021-12-15 11:18:54,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531481911] [2021-12-15 11:18:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:54,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:54,175 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 11:18:54,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:54,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531481911] [2021-12-15 11:18:54,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531481911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:54,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:54,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:18:54,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095658851] [2021-12-15 11:18:54,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:54,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:18:54,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:18:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:54,178 INFO L87 Difference]: Start difference. First operand 86796 states and 141422 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 11:18:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:56,871 INFO L93 Difference]: Finished difference Result 253774 states and 413902 transitions. [2021-12-15 11:18:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:18:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-15 11:18:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:57,222 INFO L225 Difference]: With dead ends: 253774 [2021-12-15 11:18:57,222 INFO L226 Difference]: Without dead ends: 167212 [2021-12-15 11:18:57,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:57,293 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 325 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:57,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2437 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167212 states. [2021-12-15 11:19:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167212 to 167210. [2021-12-15 11:19:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167210 states, 167209 states have (on average 1.6197872124108152) internal successors, (270843), 167209 states have internal predecessors, (270843), 0 states have call successors, (0), 0 states 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 11:19:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167210 states to 167210 states and 270843 transitions. [2021-12-15 11:19:01,583 INFO L78 Accepts]: Start accepts. Automaton has 167210 states and 270843 transitions. Word has length 131 [2021-12-15 11:19:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:19:01,584 INFO L470 AbstractCegarLoop]: Abstraction has 167210 states and 270843 transitions. [2021-12-15 11:19:01,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 11:19:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 167210 states and 270843 transitions. [2021-12-15 11:19:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-15 11:19:01,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:19:01,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:19:01,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:19:01,585 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:19:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:19:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash 497433909, now seen corresponding path program 1 times [2021-12-15 11:19:01,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:19:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416902971] [2021-12-15 11:19:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:19:01,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:19:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:19:01,689 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 11:19:01,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:19:01,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416902971] [2021-12-15 11:19:01,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416902971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:19:01,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:19:01,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:19:01,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592445044] [2021-12-15 11:19:01,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:19:01,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:19:01,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:19:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:19:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:19:01,691 INFO L87 Difference]: Start difference. First operand 167210 states and 270843 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 11:19:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:19:07,261 INFO L93 Difference]: Finished difference Result 322642 states and 518042 transitions. [2021-12-15 11:19:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:19:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-15 11:19:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:19:08,040 INFO L225 Difference]: With dead ends: 322642 [2021-12-15 11:19:08,041 INFO L226 Difference]: Without dead ends: 322640 [2021-12-15 11:19:08,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:19:08,123 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 1516 mSDsluCounter, 2440 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:19:08,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 3069 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:19:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322640 states. [2021-12-15 11:19:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322640 to 173018. [2021-12-15 11:19:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173018 states, 173017 states have (on average 1.5988255489344978) internal successors, (276624), 173017 states have internal predecessors, (276624), 0 states have call successors, (0), 0 states 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 11:19:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173018 states to 173018 states and 276624 transitions. [2021-12-15 11:19:14,055 INFO L78 Accepts]: Start accepts. Automaton has 173018 states and 276624 transitions. Word has length 132 [2021-12-15 11:19:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:19:14,055 INFO L470 AbstractCegarLoop]: Abstraction has 173018 states and 276624 transitions. [2021-12-15 11:19:14,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 11:19:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 173018 states and 276624 transitions. [2021-12-15 11:19:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-15 11:19:14,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:19:14,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:19:14,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:19:14,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:19:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:19:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash 775633267, now seen corresponding path program 1 times [2021-12-15 11:19:14,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:19:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951060509] [2021-12-15 11:19:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:19:14,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:19:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:19:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:19:14,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:19:14,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951060509] [2021-12-15 11:19:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951060509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:19:14,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:19:14,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:19:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495901465] [2021-12-15 11:19:14,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:19:14,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:19:14,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:19:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:19:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:19:14,134 INFO L87 Difference]: Start difference. First operand 173018 states and 276624 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)