./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.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 1fd9e1e868c304b5369800f6e74fe17eb5b4635faf40e950da9c44d0d244c905 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:01:42,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:01:42,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:01:42,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:01:42,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:01:42,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:01:42,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:01:42,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:01:42,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:01:42,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:01:42,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:01:42,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:01:42,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:01:42,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:01:42,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:01:42,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:01:42,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:01:42,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:01:42,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:01:42,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:01:42,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:01:42,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:01:42,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:01:42,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:01:42,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:01:42,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:01:42,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:01:42,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:01:42,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:01:42,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:01:42,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:01:42,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:01:42,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:01:42,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:01:42,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:01:42,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:01:42,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:01:42,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:01:42,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:01:42,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:01:42,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:01:42,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:01:42,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:01:42,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:01:42,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:01:42,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:01:42,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:01:42,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:01:42,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:01:42,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:01:42,587 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:01:42,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:01:42,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:01:42,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:01:42,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:01:42,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:01:42,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:01:42,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:01:42,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:01:42,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:01:42,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:01:42,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:01:42,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:01:42,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:01:42,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:01:42,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:01:42,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:42,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:01:42,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:01:42,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:01:42,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:01:42,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:01:42,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:01:42,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:01:42,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:01:42,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:01:42,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd9e1e868c304b5369800f6e74fe17eb5b4635faf40e950da9c44d0d244c905 [2021-12-14 16:01:42,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:01:42,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:01:42,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:01:42,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:01:42,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:01:42,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:01:42,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1da007c/780a8898d22b469ca11ec29b4bcd41c2/FLAGd3ea70afa [2021-12-14 16:01:43,668 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:01:43,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:01:43,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1da007c/780a8898d22b469ca11ec29b4bcd41c2/FLAGd3ea70afa [2021-12-14 16:01:43,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1da007c/780a8898d22b469ca11ec29b4bcd41c2 [2021-12-14 16:01:43,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:01:43,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:01:43,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:43,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:01:43,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:01:43,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:43" (1/1) ... [2021-12-14 16:01:43,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b4f1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:43, skipping insertion in model container [2021-12-14 16:01:43,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:43" (1/1) ... [2021-12-14 16:01:43,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:01:43,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:01:44,281 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c[6450,6463] [2021-12-14 16:01:44,352 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c[13511,13524] [2021-12-14 16:01:44,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:44,996 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:01:45,039 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c[6450,6463] [2021-12-14 16:01:45,048 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c[13511,13524] [2021-12-14 16:01:45,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:45,446 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:01:45,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45 WrapperNode [2021-12-14 16:01:45,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:45,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:45,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:01:45,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:01:45,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:45,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:45,924 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-14 16:01:45,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:45,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:01:45,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:01:45,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:01:45,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:45,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:01:46,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:01:46,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:01:46,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:01:46,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (1/1) ... [2021-12-14 16:01:46,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:46,517 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) [2021-12-14 16:01:46,579 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 [2021-12-14 16:01:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:01:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:01:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:01:46,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:01:46,743 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:01:46,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:01:50,212 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:01:50,230 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:01:50,230 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:01:50,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:50 BoogieIcfgContainer [2021-12-14 16:01:50,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:01:50,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:01:50,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:01:50,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:01:50,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:01:43" (1/3) ... [2021-12-14 16:01:50,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafe826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:50, skipping insertion in model container [2021-12-14 16:01:50,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:45" (2/3) ... [2021-12-14 16:01:50,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafe826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:50, skipping insertion in model container [2021-12-14 16:01:50,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:50" (3/3) ... [2021-12-14 16:01:50,241 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:01:50,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:01:50,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:01:50,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:01:50,306 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 [2021-12-14 16:01:50,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:01:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:50,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:50,354 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] [2021-12-14 16:01:50,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-14 16:01:50,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679358194] [2021-12-14 16:01:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:50,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:50,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:50,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679358194] [2021-12-14 16:01:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679358194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:50,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:50,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:01:50,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487974161] [2021-12-14 16:01:50,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:50,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:01:50,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:01:50,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:01:50,600 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:50,679 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-14 16:01:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:01:50,681 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:50,699 INFO L225 Difference]: With dead ends: 1736 [2021-12-14 16:01:50,700 INFO L226 Difference]: Without dead ends: 814 [2021-12-14 16:01:50,705 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 [2021-12-14 16:01:50,708 INFO L933 BasicCegarLoop]: 1600 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, 1600 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 [2021-12-14 16:01:50,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-14 16:01:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-14 16:01:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-14 16:01:50,781 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-14 16:01:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:50,782 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-14 16:01:50,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-14 16:01:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:50,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:50,784 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] [2021-12-14 16:01:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:01:50,784 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-14 16:01:50,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:50,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069801736] [2021-12-14 16:01:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:50,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:50,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:50,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069801736] [2021-12-14 16:01:50,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069801736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:50,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:50,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:50,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924981348] [2021-12-14 16:01:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:50,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:50,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:50,850 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:50,922 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-14 16:01:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:50,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:50,926 INFO L225 Difference]: With dead ends: 856 [2021-12-14 16:01:50,927 INFO L226 Difference]: Without dead ends: 814 [2021-12-14 16:01:50,927 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 [2021-12-14 16:01:50,929 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:50,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-14 16:01:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-14 16:01:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-14 16:01:50,954 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-14 16:01:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:50,955 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-14 16:01:50,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-14 16:01:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:50,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:50,956 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] [2021-12-14 16:01:50,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:01:50,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-14 16:01:50,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447146510] [2021-12-14 16:01:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:50,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447146510] [2021-12-14 16:01:51,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447146510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:51,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:51,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:51,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932411483] [2021-12-14 16:01:51,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:51,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:51,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:51,049 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:51,081 INFO L93 Difference]: Finished difference Result 884 states and 1628 transitions. [2021-12-14 16:01:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:51,085 INFO L225 Difference]: With dead ends: 884 [2021-12-14 16:01:51,086 INFO L226 Difference]: Without dead ends: 846 [2021-12-14 16:01:51,089 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 [2021-12-14 16:01:51,092 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 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 [2021-12-14 16:01:51,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-14 16:01:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-14 16:01:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8610451306413303) internal successors, (1567), 843 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1567 transitions. [2021-12-14 16:01:51,115 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1567 transitions. Word has length 41 [2021-12-14 16:01:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:51,116 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1567 transitions. [2021-12-14 16:01:51,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1567 transitions. [2021-12-14 16:01:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:51,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:51,118 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] [2021-12-14 16:01:51,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:01:51,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-14 16:01:51,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500360136] [2021-12-14 16:01:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500360136] [2021-12-14 16:01:51,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500360136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:51,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:51,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:51,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248765827] [2021-12-14 16:01:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:51,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:51,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:51,213 INFO L87 Difference]: Start difference. First operand 844 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:51,259 INFO L93 Difference]: Finished difference Result 968 states and 1759 transitions. [2021-12-14 16:01:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:51,264 INFO L225 Difference]: With dead ends: 968 [2021-12-14 16:01:51,264 INFO L226 Difference]: Without dead ends: 900 [2021-12-14 16:01:51,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:51,265 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 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 [2021-12-14 16:01:51,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-14 16:01:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 898. [2021-12-14 16:01:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8415178571428572) internal successors, (1650), 897 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1650 transitions. [2021-12-14 16:01:51,287 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1650 transitions. Word has length 41 [2021-12-14 16:01:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:51,287 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1650 transitions. [2021-12-14 16:01:51,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1650 transitions. [2021-12-14 16:01:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:51,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:51,289 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] [2021-12-14 16:01:51,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:01:51,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-14 16:01:51,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045308413] [2021-12-14 16:01:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045308413] [2021-12-14 16:01:51,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045308413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:51,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:51,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:51,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030412935] [2021-12-14 16:01:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:51,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:51,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:51,349 INFO L87 Difference]: Start difference. First operand 898 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:51,479 INFO L93 Difference]: Finished difference Result 1630 states and 2784 transitions. [2021-12-14 16:01:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:51,487 INFO L225 Difference]: With dead ends: 1630 [2021-12-14 16:01:51,487 INFO L226 Difference]: Without dead ends: 1508 [2021-12-14 16:01:51,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:51,489 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:51,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:01:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-14 16:01:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1018. [2021-12-14 16:01:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1016 states have (on average 1.8011811023622046) internal successors, (1830), 1017 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1830 transitions. [2021-12-14 16:01:51,527 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1830 transitions. Word has length 41 [2021-12-14 16:01:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:51,531 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1830 transitions. [2021-12-14 16:01:51,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1830 transitions. [2021-12-14 16:01:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:51,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:51,536 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] [2021-12-14 16:01:51,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:01:51,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-14 16:01:51,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262812010] [2021-12-14 16:01:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262812010] [2021-12-14 16:01:51,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262812010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:51,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:51,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:51,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482746972] [2021-12-14 16:01:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:51,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:51,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:51,634 INFO L87 Difference]: Start difference. First operand 1018 states and 1830 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:51,686 INFO L93 Difference]: Finished difference Result 1458 states and 2492 transitions. [2021-12-14 16:01:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:51,693 INFO L225 Difference]: With dead ends: 1458 [2021-12-14 16:01:51,693 INFO L226 Difference]: Without dead ends: 1216 [2021-12-14 16:01:51,694 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 [2021-12-14 16:01:51,695 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:51,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-14 16:01:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1206. [2021-12-14 16:01:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.739202657807309) internal successors, (2094), 1205 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2094 transitions. [2021-12-14 16:01:51,729 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2094 transitions. Word has length 43 [2021-12-14 16:01:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:51,729 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2094 transitions. [2021-12-14 16:01:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2094 transitions. [2021-12-14 16:01:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:51,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:51,731 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] [2021-12-14 16:01:51,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:01:51,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-14 16:01:51,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243634530] [2021-12-14 16:01:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243634530] [2021-12-14 16:01:51,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243634530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:51,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:51,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987704405] [2021-12-14 16:01:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:51,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:51,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:51,836 INFO L87 Difference]: Start difference. First operand 1206 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:51,923 INFO L93 Difference]: Finished difference Result 1638 states and 2728 transitions. [2021-12-14 16:01:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:51,932 INFO L225 Difference]: With dead ends: 1638 [2021-12-14 16:01:51,932 INFO L226 Difference]: Without dead ends: 1208 [2021-12-14 16:01:51,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:51,936 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:51,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-12-14 16:01:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2021-12-14 16:01:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.7325581395348837) internal successors, (2086), 1205 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2086 transitions. [2021-12-14 16:01:51,975 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2086 transitions. Word has length 43 [2021-12-14 16:01:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:51,976 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2086 transitions. [2021-12-14 16:01:51,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2086 transitions. [2021-12-14 16:01:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:01:51,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:51,979 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] [2021-12-14 16:01:51,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:01:51,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-14 16:01:51,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579301784] [2021-12-14 16:01:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:52,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579301784] [2021-12-14 16:01:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579301784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:52,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:52,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146340503] [2021-12-14 16:01:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:52,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:52,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:52,055 INFO L87 Difference]: Start difference. First operand 1206 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:52,145 INFO L93 Difference]: Finished difference Result 1540 states and 2558 transitions. [2021-12-14 16:01:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:52,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-14 16:01:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:52,153 INFO L225 Difference]: With dead ends: 1540 [2021-12-14 16:01:52,153 INFO L226 Difference]: Without dead ends: 1538 [2021-12-14 16:01:52,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:52,155 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:52,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-14 16:01:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1230. [2021-12-14 16:01:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1228 states have (on average 1.714983713355049) internal successors, (2106), 1229 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2106 transitions. [2021-12-14 16:01:52,217 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2106 transitions. Word has length 44 [2021-12-14 16:01:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:52,217 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2106 transitions. [2021-12-14 16:01:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2106 transitions. [2021-12-14 16:01:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:01:52,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:52,219 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] [2021-12-14 16:01:52,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:01:52,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-14 16:01:52,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415545161] [2021-12-14 16:01:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:52,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:52,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415545161] [2021-12-14 16:01:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415545161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:52,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:52,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:52,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499487938] [2021-12-14 16:01:52,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:52,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:52,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:52,269 INFO L87 Difference]: Start difference. First operand 1230 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:52,316 INFO L93 Difference]: Finished difference Result 1701 states and 2784 transitions. [2021-12-14 16:01:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-14 16:01:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:52,323 INFO L225 Difference]: With dead ends: 1701 [2021-12-14 16:01:52,324 INFO L226 Difference]: Without dead ends: 1434 [2021-12-14 16:01:52,324 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 [2021-12-14 16:01:52,325 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 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 [2021-12-14 16:01:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-12-14 16:01:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1432. [2021-12-14 16:01:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1430 states have (on average 1.6671328671328671) internal successors, (2384), 1431 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2384 transitions. [2021-12-14 16:01:52,375 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2384 transitions. Word has length 45 [2021-12-14 16:01:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:52,376 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2384 transitions. [2021-12-14 16:01:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2384 transitions. [2021-12-14 16:01:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 16:01:52,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:52,377 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] [2021-12-14 16:01:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:01:52,378 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 707245808, now seen corresponding path program 1 times [2021-12-14 16:01:52,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:52,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975917361] [2021-12-14 16:01:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:52,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:52,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975917361] [2021-12-14 16:01:52,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975917361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:52,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:52,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:52,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155762794] [2021-12-14 16:01:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:01:52,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:01:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:01:52,436 INFO L87 Difference]: Start difference. First operand 1432 states and 2384 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:57,993 INFO L93 Difference]: Finished difference Result 3687 states and 6693 transitions. [2021-12-14 16:01:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:01:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-14 16:01:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:58,006 INFO L225 Difference]: With dead ends: 3687 [2021-12-14 16:01:58,006 INFO L226 Difference]: Without dead ends: 2934 [2021-12-14 16:01:58,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:58,009 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 2345 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:58,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2345 Valid, 774 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-14 16:01:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-12-14 16:01:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2934. [2021-12-14 16:01:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2932 states have (on average 1.534106412005457) internal successors, (4498), 2933 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4498 transitions. [2021-12-14 16:01:58,081 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4498 transitions. Word has length 61 [2021-12-14 16:01:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4498 transitions. [2021-12-14 16:01:58,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4498 transitions. [2021-12-14 16:01:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:58,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:58,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:58,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:01:58,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-14 16:01:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14133537] [2021-12-14 16:01:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:58,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:01:58,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14133537] [2021-12-14 16:01:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14133537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:58,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:58,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:58,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368052341] [2021-12-14 16:01:58,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:58,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:58,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:58,131 INFO L87 Difference]: Start difference. First operand 2934 states and 4498 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:58,271 INFO L93 Difference]: Finished difference Result 5038 states and 7450 transitions. [2021-12-14 16:01:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 64 [2021-12-14 16:01:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:58,288 INFO L225 Difference]: With dead ends: 5038 [2021-12-14 16:01:58,288 INFO L226 Difference]: Without dead ends: 4384 [2021-12-14 16:01:58,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:58,292 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:58,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-14 16:01:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3586. [2021-12-14 16:01:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3584 states have (on average 1.5083705357142858) internal successors, (5406), 3585 states have internal predecessors, (5406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5406 transitions. [2021-12-14 16:01:58,404 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5406 transitions. Word has length 64 [2021-12-14 16:01:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 5406 transitions. [2021-12-14 16:01:58,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5406 transitions. [2021-12-14 16:01:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:58,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:58,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:58,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:01:58,407 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-14 16:01:58,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617731272] [2021-12-14 16:01:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:58,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 16:01:58,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:58,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617731272] [2021-12-14 16:01:58,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617731272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:58,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:58,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:58,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653226271] [2021-12-14 16:01:58,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:58,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:58,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:58,473 INFO L87 Difference]: Start difference. First operand 3586 states and 5406 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:58,673 INFO L93 Difference]: Finished difference Result 5690 states and 8358 transitions. [2021-12-14 16:01:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 64 [2021-12-14 16:01:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:58,691 INFO L225 Difference]: With dead ends: 5690 [2021-12-14 16:01:58,692 INFO L226 Difference]: Without dead ends: 5036 [2021-12-14 16:01:58,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:58,697 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:58,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-12-14 16:01:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 4566. [2021-12-14 16:01:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4564 states have (on average 1.4807186678352322) internal successors, (6758), 4565 states have internal predecessors, (6758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6758 transitions. [2021-12-14 16:01:58,859 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6758 transitions. Word has length 64 [2021-12-14 16:01:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:58,859 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 6758 transitions. [2021-12-14 16:01:58,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6758 transitions. [2021-12-14 16:01:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:58,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:58,861 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:58,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:01:58,862 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-14 16:01:58,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:58,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072194419] [2021-12-14 16:01:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:58,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:58,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072194419] [2021-12-14 16:01:58,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072194419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:58,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:58,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:58,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631537678] [2021-12-14 16:01:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:58,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:58,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:58,910 INFO L87 Difference]: Start difference. First operand 4566 states and 6758 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:59,006 INFO L93 Difference]: Finished difference Result 6216 states and 9082 transitions. [2021-12-14 16:01:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-14 16:01:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:59,033 INFO L225 Difference]: With dead ends: 6216 [2021-12-14 16:01:59,033 INFO L226 Difference]: Without dead ends: 3930 [2021-12-14 16:01:59,038 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 [2021-12-14 16:01:59,039 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:59,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-12-14 16:01:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2021-12-14 16:01:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3926 states have (on average 1.4954151808456444) internal successors, (5871), 3927 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5871 transitions. [2021-12-14 16:01:59,173 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5871 transitions. Word has length 66 [2021-12-14 16:01:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:59,173 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5871 transitions. [2021-12-14 16:01:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5871 transitions. [2021-12-14 16:01:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:59,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:59,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:59,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:01:59,180 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-14 16:01:59,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:59,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104657255] [2021-12-14 16:01:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:59,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:59,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:59,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104657255] [2021-12-14 16:01:59,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104657255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:59,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:59,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:59,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278961755] [2021-12-14 16:01:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:59,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:59,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:59,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:59,234 INFO L87 Difference]: Start difference. First operand 3928 states and 5871 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:59,408 INFO L93 Difference]: Finished difference Result 5328 states and 7843 transitions. [2021-12-14 16:01:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 66 [2021-12-14 16:01:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:59,418 INFO L225 Difference]: With dead ends: 5328 [2021-12-14 16:01:59,419 INFO L226 Difference]: Without dead ends: 4862 [2021-12-14 16:01:59,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:59,422 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3074 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:59,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 3215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-12-14 16:01:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4392. [2021-12-14 16:01:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4390 states have (on average 1.4849658314350798) internal successors, (6519), 4391 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6519 transitions. [2021-12-14 16:01:59,568 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6519 transitions. Word has length 66 [2021-12-14 16:01:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:59,568 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 6519 transitions. [2021-12-14 16:01:59,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6519 transitions. [2021-12-14 16:01:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:01:59,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:59,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:59,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:01:59,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:59,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-14 16:01:59,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:59,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392866708] [2021-12-14 16:01:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:59,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:59,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:59,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392866708] [2021-12-14 16:01:59,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392866708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:59,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778002210] [2021-12-14 16:01:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:59,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:59,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:59,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:01:59,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:01:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 16:01:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:02:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:02:00,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:02:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:02:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778002210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:02:00,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:02:00,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-14 16:02:00,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453211964] [2021-12-14 16:02:00,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:02:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:02:00,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:02:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:02:00,538 INFO L87 Difference]: Start difference. First operand 4392 states and 6519 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:03,753 INFO L93 Difference]: Finished difference Result 23693 states and 32912 transitions. [2021-12-14 16:02:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-14 16:02:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-14 16:02:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:03,804 INFO L225 Difference]: With dead ends: 23693 [2021-12-14 16:02:03,805 INFO L226 Difference]: Without dead ends: 21603 [2021-12-14 16:02:03,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-14 16:02:03,821 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 16498 mSDsluCounter, 5321 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16498 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:03,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16498 Valid, 6888 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:02:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21603 states. [2021-12-14 16:02:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21603 to 13256. [2021-12-14 16:02:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13254 states have (on average 1.3722649766108346) internal successors, (18188), 13255 states have internal predecessors, (18188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18188 transitions. [2021-12-14 16:02:04,561 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18188 transitions. Word has length 67 [2021-12-14 16:02:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:04,562 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 18188 transitions. [2021-12-14 16:02:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18188 transitions. [2021-12-14 16:02:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:04,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:04,564 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:04,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 16:02:04,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-14 16:02:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147607382] [2021-12-14 16:02:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:04,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:05,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147607382] [2021-12-14 16:02:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147607382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480202164] [2021-12-14 16:02:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:05,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:05,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:02:05,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:02:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:02:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:02:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:05,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:02:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:06,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480202164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:02:06,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:02:06,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-14 16:02:06,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586207289] [2021-12-14 16:02:06,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:02:06,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 16:02:06,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 16:02:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-14 16:02:06,266 INFO L87 Difference]: Start difference. First operand 13256 states and 18188 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:10,323 INFO L93 Difference]: Finished difference Result 69828 states and 92514 transitions. [2021-12-14 16:02:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 16:02:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:10,485 INFO L225 Difference]: With dead ends: 69828 [2021-12-14 16:02:10,486 INFO L226 Difference]: Without dead ends: 60560 [2021-12-14 16:02:10,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-14 16:02:10,511 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 15784 mSDsluCounter, 6653 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15784 SdHoareTripleChecker+Valid, 8201 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:10,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15784 Valid, 8201 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:02:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60560 states. [2021-12-14 16:02:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60560 to 27725. [2021-12-14 16:02:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27725 states, 27723 states have (on average 1.3484471377556542) internal successors, (37383), 27724 states have internal predecessors, (37383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27725 states to 27725 states and 37383 transitions. [2021-12-14 16:02:12,090 INFO L78 Accepts]: Start accepts. Automaton has 27725 states and 37383 transitions. Word has length 68 [2021-12-14 16:02:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:12,090 INFO L470 AbstractCegarLoop]: Abstraction has 27725 states and 37383 transitions. [2021-12-14 16:02:12,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27725 states and 37383 transitions. [2021-12-14 16:02:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:12,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:12,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:12,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:12,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 16:02:12,317 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-14 16:02:12,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:12,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865465487] [2021-12-14 16:02:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:12,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:12,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:12,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865465487] [2021-12-14 16:02:12,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865465487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929282994] [2021-12-14 16:02:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:12,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:12,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:02:12,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:02:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:02:12,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:02:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:13,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:02:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:13,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929282994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:02:13,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:02:13,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:02:13,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654420269] [2021-12-14 16:02:13,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:02:13,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:02:13,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:02:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:02:13,801 INFO L87 Difference]: Start difference. First operand 27725 states and 37383 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:18,786 INFO L93 Difference]: Finished difference Result 115116 states and 151832 transitions. [2021-12-14 16:02:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:02:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:18,957 INFO L225 Difference]: With dead ends: 115116 [2021-12-14 16:02:18,958 INFO L226 Difference]: Without dead ends: 92893 [2021-12-14 16:02:19,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 16:02:19,011 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 9279 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9279 SdHoareTripleChecker+Valid, 7978 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9279 Valid, 7978 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:02:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92893 states. [2021-12-14 16:02:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92893 to 54762. [2021-12-14 16:02:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54762 states, 54760 states have (on average 1.3221146822498173) internal successors, (72399), 54761 states have internal predecessors, (72399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54762 states to 54762 states and 72399 transitions. [2021-12-14 16:02:22,601 INFO L78 Accepts]: Start accepts. Automaton has 54762 states and 72399 transitions. Word has length 68 [2021-12-14 16:02:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:22,601 INFO L470 AbstractCegarLoop]: Abstraction has 54762 states and 72399 transitions. [2021-12-14 16:02:22,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 54762 states and 72399 transitions. [2021-12-14 16:02:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:22,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:22,604 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:22,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:22,811 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-14 16:02:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420078426] [2021-12-14 16:02:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:22,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:22,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:22,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420078426] [2021-12-14 16:02:22,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420078426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:22,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:22,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:22,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613502176] [2021-12-14 16:02:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:22,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:22,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:22,855 INFO L87 Difference]: Start difference. First operand 54762 states and 72399 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:24,525 INFO L93 Difference]: Finished difference Result 79200 states and 103942 transitions. [2021-12-14 16:02:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:24,582 INFO L225 Difference]: With dead ends: 79200 [2021-12-14 16:02:24,583 INFO L226 Difference]: Without dead ends: 32120 [2021-12-14 16:02:24,636 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 [2021-12-14 16:02:24,636 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:24,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32120 states. [2021-12-14 16:02:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32120 to 31692. [2021-12-14 16:02:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 31690 states have (on average 1.2933733038813506) internal successors, (40987), 31691 states have internal predecessors, (40987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 40987 transitions. [2021-12-14 16:02:26,341 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 40987 transitions. Word has length 68 [2021-12-14 16:02:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:26,341 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 40987 transitions. [2021-12-14 16:02:26,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 40987 transitions. [2021-12-14 16:02:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:26,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:26,345 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:26,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:02:26,345 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-14 16:02:26,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276867919] [2021-12-14 16:02:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:26,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:26,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276867919] [2021-12-14 16:02:26,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276867919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:26,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:26,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:26,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434495991] [2021-12-14 16:02:26,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:26,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:26,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:26,377 INFO L87 Difference]: Start difference. First operand 31692 states and 40987 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:27,495 INFO L93 Difference]: Finished difference Result 47678 states and 61201 transitions. [2021-12-14 16:02:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:27,521 INFO L225 Difference]: With dead ends: 47678 [2021-12-14 16:02:27,521 INFO L226 Difference]: Without dead ends: 21614 [2021-12-14 16:02:27,544 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 [2021-12-14 16:02:27,544 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:27,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21614 states. [2021-12-14 16:02:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21614 to 21612. [2021-12-14 16:02:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 21610 states have (on average 1.2746876446089774) internal successors, (27546), 21611 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 27546 transitions. [2021-12-14 16:02:28,658 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 27546 transitions. Word has length 68 [2021-12-14 16:02:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:28,659 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 27546 transitions. [2021-12-14 16:02:28,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 27546 transitions. [2021-12-14 16:02:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:28,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:28,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:28,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:02:28,661 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-14 16:02:28,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820567835] [2021-12-14 16:02:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:28,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:02:28,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820567835] [2021-12-14 16:02:28,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820567835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:28,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:28,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:28,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283306153] [2021-12-14 16:02:28,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:28,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:28,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:28,720 INFO L87 Difference]: Start difference. First operand 21612 states and 27546 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:29,805 INFO L93 Difference]: Finished difference Result 37375 states and 47271 transitions. [2021-12-14 16:02:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:29,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:29,828 INFO L225 Difference]: With dead ends: 37375 [2021-12-14 16:02:29,828 INFO L226 Difference]: Without dead ends: 18128 [2021-12-14 16:02:29,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:29,851 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:29,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2021-12-14 16:02:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 18128. [2021-12-14 16:02:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18126 states have (on average 1.2665783956747214) internal successors, (22958), 18127 states have internal predecessors, (22958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 22958 transitions. [2021-12-14 16:02:30,786 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 22958 transitions. Word has length 68 [2021-12-14 16:02:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:30,786 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 22958 transitions. [2021-12-14 16:02:30,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 22958 transitions. [2021-12-14 16:02:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:30,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:30,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:30,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:02:30,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-14 16:02:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:30,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111133299] [2021-12-14 16:02:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:30,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 16:02:30,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111133299] [2021-12-14 16:02:30,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111133299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:30,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:30,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:30,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515131218] [2021-12-14 16:02:30,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:30,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:30,833 INFO L87 Difference]: Start difference. First operand 18128 states and 22958 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:31,583 INFO L93 Difference]: Finished difference Result 29739 states and 37209 transitions. [2021-12-14 16:02:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:31,604 INFO L225 Difference]: With dead ends: 29739 [2021-12-14 16:02:31,604 INFO L226 Difference]: Without dead ends: 14008 [2021-12-14 16:02:31,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:31,619 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:31,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14008 states. [2021-12-14 16:02:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14008 to 14008. [2021-12-14 16:02:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14008 states, 14006 states have (on average 1.2621019563044409) internal successors, (17677), 14007 states have internal predecessors, (17677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14008 states to 14008 states and 17677 transitions. [2021-12-14 16:02:32,314 INFO L78 Accepts]: Start accepts. Automaton has 14008 states and 17677 transitions. Word has length 68 [2021-12-14 16:02:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:32,315 INFO L470 AbstractCegarLoop]: Abstraction has 14008 states and 17677 transitions. [2021-12-14 16:02:32,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 14008 states and 17677 transitions. [2021-12-14 16:02:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:32,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:32,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:32,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:02:32,316 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-14 16:02:32,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839252967] [2021-12-14 16:02:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:32,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:02:32,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839252967] [2021-12-14 16:02:32,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839252967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:32,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:32,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:32,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627595692] [2021-12-14 16:02:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:32,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:32,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:32,360 INFO L87 Difference]: Start difference. First operand 14008 states and 17677 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:32,997 INFO L93 Difference]: Finished difference Result 23014 states and 28602 transitions. [2021-12-14 16:02:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 68 [2021-12-14 16:02:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:33,011 INFO L225 Difference]: With dead ends: 23014 [2021-12-14 16:02:33,012 INFO L226 Difference]: Without dead ends: 11324 [2021-12-14 16:02:33,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:33,022 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4519 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4519 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:33,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4519 Valid, 2956 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-12-14 16:02:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 11324. [2021-12-14 16:02:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 11322 states have (on average 1.268150503444621) internal successors, (14358), 11323 states have internal predecessors, (14358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 14358 transitions. [2021-12-14 16:02:33,561 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 14358 transitions. Word has length 68 [2021-12-14 16:02:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:33,561 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 14358 transitions. [2021-12-14 16:02:33,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 14358 transitions. [2021-12-14 16:02:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:02:33,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:33,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:33,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:02:33,563 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-14 16:02:33,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:33,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291648453] [2021-12-14 16:02:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:33,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:34,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291648453] [2021-12-14 16:02:34,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291648453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:34,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570749887] [2021-12-14 16:02:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:34,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:34,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:34,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:02:34,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:02:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 16:02:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates...