./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label54.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 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:08:57,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:08:57,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:08:57,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:08:57,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:08:57,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:08:57,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:08:57,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:08:57,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:08:57,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:08:57,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:08:57,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:08:57,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:08:57,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:08:57,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:08:57,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:08:57,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:08:57,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:08:57,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:08:57,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:08:57,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:08:57,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:08:57,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:08:57,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:08:57,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:08:57,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:08:57,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:08:57,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:08:57,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:08:57,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:08:57,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:08:57,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:08:57,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:08:57,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:08:57,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:08:57,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:08:57,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:08:57,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:08:57,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:08:57,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:08:57,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:08:57,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:08:57,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:08:57,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:08:57,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:08:57,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:08:57,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:08:57,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:08:57,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:08:57,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:08:57,609 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:08:57,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:08:57,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:08:57,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:08:57,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:08:57,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:08:57,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:08:57,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:08:57,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:08:57,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:08:57,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:08:57,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:08:57,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:08:57,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:08:57,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:08:57,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49ff6ba228d081d26cec6b087caf15954318cb178107abc089cabcbe5599946d [2021-12-21 11:08:57,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:08:57,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:08:57,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:08:57,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:08:57,824 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:08:57,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-21 11:08:57,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39483453/1c1d63504cff4db4a3534e52a1d78c9e/FLAG7478525ae [2021-12-21 11:08:58,422 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:08:58,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c [2021-12-21 11:08:58,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39483453/1c1d63504cff4db4a3534e52a1d78c9e/FLAG7478525ae [2021-12-21 11:08:58,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39483453/1c1d63504cff4db4a3534e52a1d78c9e [2021-12-21 11:08:58,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:08:58,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:08:58,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:08:58,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:08:58,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:08:58,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:08:58" (1/1) ... [2021-12-21 11:08:58,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef6b588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:58, skipping insertion in model container [2021-12-21 11:08:58,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:08:58" (1/1) ... [2021-12-21 11:08:58,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:08:59,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:08:59,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c[4044,4057] [2021-12-21 11:08:59,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:08:59,765 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:08:59,786 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label54.c[4044,4057] [2021-12-21 11:09:00,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:09:00,173 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:09:00,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00 WrapperNode [2021-12-21 11:09:00,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:09:00,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:09:00,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:09:00,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:09:00,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:00,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:00,693 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-21 11:09:00,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:09:00,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:09:00,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:09:00,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:09:00,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:00,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:00,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:00,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:01,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:01,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:01,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:01,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:09:01,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:09:01,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:09:01,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:09:01,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (1/1) ... [2021-12-21 11:09:01,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:09:01,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:09:01,155 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) [2021-12-21 11:09:01,160 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 [2021-12-21 11:09:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:09:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:09:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:09:01,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:09:01,267 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:09:01,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:09:04,696 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:09:04,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:09:04,708 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:09:04,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:09:04 BoogieIcfgContainer [2021-12-21 11:09:04,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:09:04,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:09:04,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:09:04,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:09:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:08:58" (1/3) ... [2021-12-21 11:09:04,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35068f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:09:04, skipping insertion in model container [2021-12-21 11:09:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:09:00" (2/3) ... [2021-12-21 11:09:04,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35068f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:09:04, skipping insertion in model container [2021-12-21 11:09:04,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:09:04" (3/3) ... [2021-12-21 11:09:04,717 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2021-12-21 11:09:04,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:09:04,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:09:04,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:09:04,772 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 [2021-12-21 11:09:04,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:09:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 11:09:04,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:04,807 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] [2021-12-21 11:09:04,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-12-21 11:09:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:04,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435366983] [2021-12-21 11:09:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:04,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:04,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435366983] [2021-12-21 11:09:04,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435366983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:04,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:04,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734404820] [2021-12-21 11:09:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:04,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:05,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:05,021 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:08,421 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-21 11:09:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-21 11:09:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:08,450 INFO L225 Difference]: With dead ends: 3147 [2021-12-21 11:09:08,450 INFO L226 Difference]: Without dead ends: 1964 [2021-12-21 11:09:08,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:08,462 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1152 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:08,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 11:09:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-21 11:09:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-21 11:09:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-21 11:09:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 27 [2021-12-21 11:09:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:08,559 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-21 11:09:08,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-21 11:09:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 11:09:08,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:08,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:08,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:09:08,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash 575451273, now seen corresponding path program 1 times [2021-12-21 11:09:08,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561524066] [2021-12-21 11:09:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:08,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:08,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561524066] [2021-12-21 11:09:08,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561524066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:08,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:08,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:08,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136686265] [2021-12-21 11:09:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:08,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:08,650 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:11,761 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-12-21 11:09:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-21 11:09:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:11,781 INFO L225 Difference]: With dead ends: 5542 [2021-12-21 11:09:11,781 INFO L226 Difference]: Without dead ends: 3593 [2021-12-21 11:09:11,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:11,787 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 11:09:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-21 11:09:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-12-21 11:09:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-21 11:09:11,843 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 98 [2021-12-21 11:09:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:11,845 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-21 11:09:11,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-21 11:09:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 11:09:11,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:11,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:11,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:09:11,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 228222636, now seen corresponding path program 1 times [2021-12-21 11:09:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109641156] [2021-12-21 11:09:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:11,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:11,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109641156] [2021-12-21 11:09:11,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109641156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:11,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:11,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:11,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524690556] [2021-12-21 11:09:11,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:11,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:11,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:11,972 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:14,789 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-21 11:09:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-21 11:09:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:14,812 INFO L225 Difference]: With dead ends: 10352 [2021-12-21 11:09:14,813 INFO L226 Difference]: Without dead ends: 6773 [2021-12-21 11:09:14,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:14,824 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:14,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:09:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-21 11:09:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-21 11:09:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-12-21 11:09:14,922 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 112 [2021-12-21 11:09:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-12-21 11:09:14,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-12-21 11:09:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 11:09:14,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:14,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:14,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:09:14,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1558843312, now seen corresponding path program 1 times [2021-12-21 11:09:14,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583054065] [2021-12-21 11:09:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:14,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:15,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583054065] [2021-12-21 11:09:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583054065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:15,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:15,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844856572] [2021-12-21 11:09:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:15,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:15,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:15,032 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:17,944 INFO L93 Difference]: Finished difference Result 19804 states and 26220 transitions. [2021-12-21 11:09:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-21 11:09:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:17,991 INFO L225 Difference]: With dead ends: 19804 [2021-12-21 11:09:17,991 INFO L226 Difference]: Without dead ends: 13057 [2021-12-21 11:09:18,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:18,007 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:18,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:09:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-12-21 11:09:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-12-21 11:09:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.217914336066202) internal successors, (15895), 13051 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15895 transitions. [2021-12-21 11:09:18,235 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15895 transitions. Word has length 141 [2021-12-21 11:09:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:18,236 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15895 transitions. [2021-12-21 11:09:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15895 transitions. [2021-12-21 11:09:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-21 11:09:18,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:18,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:18,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:09:18,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1789674140, now seen corresponding path program 1 times [2021-12-21 11:09:18,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:18,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087991670] [2021-12-21 11:09:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:18,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 11:09:18,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087991670] [2021-12-21 11:09:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087991670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:18,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:18,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:18,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320566943] [2021-12-21 11:09:18,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:18,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:18,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:18,371 INFO L87 Difference]: Start difference. First operand 13052 states and 15895 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:20,938 INFO L93 Difference]: Finished difference Result 26889 states and 32590 transitions. [2021-12-21 11:09:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 219 [2021-12-21 11:09:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:20,969 INFO L225 Difference]: With dead ends: 26889 [2021-12-21 11:09:20,969 INFO L226 Difference]: Without dead ends: 13839 [2021-12-21 11:09:20,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:20,981 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:20,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:09:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-12-21 11:09:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13839. [2021-12-21 11:09:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 1.2058823529411764) internal successors, (16687), 13838 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 16687 transitions. [2021-12-21 11:09:21,200 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 16687 transitions. Word has length 219 [2021-12-21 11:09:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:21,202 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 16687 transitions. [2021-12-21 11:09:21,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 16687 transitions. [2021-12-21 11:09:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-21 11:09:21,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:21,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:21,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:09:21,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1420967643, now seen corresponding path program 1 times [2021-12-21 11:09:21,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953296566] [2021-12-21 11:09:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:21,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:21,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953296566] [2021-12-21 11:09:21,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953296566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:21,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:21,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:21,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441264447] [2021-12-21 11:09:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:21,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:21,315 INFO L87 Difference]: Start difference. First operand 13839 states and 16687 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:24,189 INFO L93 Difference]: Finished difference Result 33200 states and 41058 transitions. [2021-12-21 11:09:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-12-21 11:09:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:24,219 INFO L225 Difference]: With dead ends: 33200 [2021-12-21 11:09:24,220 INFO L226 Difference]: Without dead ends: 20150 [2021-12-21 11:09:24,233 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 [2021-12-21 11:09:24,234 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 861 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:24,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 943 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:09:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20150 states. [2021-12-21 11:09:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20150 to 20140. [2021-12-21 11:09:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20140 states, 20139 states have (on average 1.1898803316947217) internal successors, (23963), 20139 states have internal predecessors, (23963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20140 states to 20140 states and 23963 transitions. [2021-12-21 11:09:24,441 INFO L78 Accepts]: Start accepts. Automaton has 20140 states and 23963 transitions. Word has length 226 [2021-12-21 11:09:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:24,441 INFO L470 AbstractCegarLoop]: Abstraction has 20140 states and 23963 transitions. [2021-12-21 11:09:24,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 20140 states and 23963 transitions. [2021-12-21 11:09:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-21 11:09:24,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:24,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:24,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:09:24,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -206220480, now seen corresponding path program 1 times [2021-12-21 11:09:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:24,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840052670] [2021-12-21 11:09:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:24,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:24,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:24,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840052670] [2021-12-21 11:09:24,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840052670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:24,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:24,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:24,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061298639] [2021-12-21 11:09:24,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:24,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:24,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:24,517 INFO L87 Difference]: Start difference. First operand 20140 states and 23963 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:27,118 INFO L93 Difference]: Finished difference Result 39361 states and 46953 transitions. [2021-12-21 11:09:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-12-21 11:09:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:27,142 INFO L225 Difference]: With dead ends: 39361 [2021-12-21 11:09:27,142 INFO L226 Difference]: Without dead ends: 20010 [2021-12-21 11:09:27,151 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 [2021-12-21 11:09:27,152 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 1037 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:27,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1642 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:09:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2021-12-21 11:09:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19220. [2021-12-21 11:09:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19220 states, 19219 states have (on average 1.1321608824600655) internal successors, (21759), 19219 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19220 states to 19220 states and 21759 transitions. [2021-12-21 11:09:27,301 INFO L78 Accepts]: Start accepts. Automaton has 19220 states and 21759 transitions. Word has length 241 [2021-12-21 11:09:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:27,302 INFO L470 AbstractCegarLoop]: Abstraction has 19220 states and 21759 transitions. [2021-12-21 11:09:27,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 19220 states and 21759 transitions. [2021-12-21 11:09:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-21 11:09:27,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:27,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:27,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:09:27,306 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:27,307 INFO L85 PathProgramCache]: Analyzing trace with hash 113626786, now seen corresponding path program 1 times [2021-12-21 11:09:27,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:27,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231488460] [2021-12-21 11:09:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:27,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:09:27,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231488460] [2021-12-21 11:09:27,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231488460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:27,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:27,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:27,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697648723] [2021-12-21 11:09:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:27,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:27,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:27,423 INFO L87 Difference]: Start difference. First operand 19220 states and 21759 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:30,291 INFO L93 Difference]: Finished difference Result 43955 states and 50452 transitions. [2021-12-21 11:09:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 315 [2021-12-21 11:09:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:30,321 INFO L225 Difference]: With dead ends: 43955 [2021-12-21 11:09:30,321 INFO L226 Difference]: Without dead ends: 25524 [2021-12-21 11:09:30,340 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 [2021-12-21 11:09:30,340 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 841 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:30,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1919 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:09:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25524 states. [2021-12-21 11:09:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25524 to 24733. [2021-12-21 11:09:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24733 states, 24732 states have (on average 1.118591298722303) internal successors, (27665), 24732 states have internal predecessors, (27665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24733 states to 24733 states and 27665 transitions. [2021-12-21 11:09:30,570 INFO L78 Accepts]: Start accepts. Automaton has 24733 states and 27665 transitions. Word has length 315 [2021-12-21 11:09:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:30,570 INFO L470 AbstractCegarLoop]: Abstraction has 24733 states and 27665 transitions. [2021-12-21 11:09:30,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24733 states and 27665 transitions. [2021-12-21 11:09:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-21 11:09:30,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:30,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:30,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:09:30,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1008172382, now seen corresponding path program 1 times [2021-12-21 11:09:30,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263070905] [2021-12-21 11:09:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:30,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 11:09:30,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263070905] [2021-12-21 11:09:30,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263070905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:30,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:30,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:30,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888526715] [2021-12-21 11:09:30,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:30,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:09:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:09:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:09:30,661 INFO L87 Difference]: Start difference. First operand 24733 states and 27665 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:36,384 INFO L93 Difference]: Finished difference Result 91376 states and 102287 transitions. [2021-12-21 11:09:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:09:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-12-21 11:09:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:36,465 INFO L225 Difference]: With dead ends: 91376 [2021-12-21 11:09:36,465 INFO L226 Difference]: Without dead ends: 67432 [2021-12-21 11:09:36,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:09:36,493 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1719 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 6001 mSolverCounterSat, 1099 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 7100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1099 IncrementalHoareTripleChecker+Valid, 6001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:36,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 764 Invalid, 7100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1099 Valid, 6001 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-21 11:09:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67432 states. [2021-12-21 11:09:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67432 to 64949. [2021-12-21 11:09:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64949 states, 64948 states have (on average 1.1045605715341504) internal successors, (71739), 64948 states have internal predecessors, (71739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64949 states to 64949 states and 71739 transitions. [2021-12-21 11:09:37,448 INFO L78 Accepts]: Start accepts. Automaton has 64949 states and 71739 transitions. Word has length 324 [2021-12-21 11:09:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 64949 states and 71739 transitions. [2021-12-21 11:09:37,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 64949 states and 71739 transitions. [2021-12-21 11:09:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-21 11:09:37,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:37,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:37,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:09:37,458 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1249030675, now seen corresponding path program 1 times [2021-12-21 11:09:37,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:37,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32537180] [2021-12-21 11:09:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:37,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 11:09:37,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32537180] [2021-12-21 11:09:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32537180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:37,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:37,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406616778] [2021-12-21 11:09:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:37,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:37,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:37,566 INFO L87 Difference]: Start difference. First operand 64949 states and 71739 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:40,836 INFO L93 Difference]: Finished difference Result 142510 states and 156966 transitions. [2021-12-21 11:09:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 324 [2021-12-21 11:09:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:40,922 INFO L225 Difference]: With dead ends: 142510 [2021-12-21 11:09:40,923 INFO L226 Difference]: Without dead ends: 77563 [2021-12-21 11:09:40,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:40,959 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 728 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:40,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1175 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:09:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-12-21 11:09:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 75978. [2021-12-21 11:09:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75978 states, 75977 states have (on average 1.0951472156047224) internal successors, (83206), 75977 states have internal predecessors, (83206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75978 states to 75978 states and 83206 transitions. [2021-12-21 11:09:41,833 INFO L78 Accepts]: Start accepts. Automaton has 75978 states and 83206 transitions. Word has length 324 [2021-12-21 11:09:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 75978 states and 83206 transitions. [2021-12-21 11:09:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 75978 states and 83206 transitions. [2021-12-21 11:09:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-21 11:09:41,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:41,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:41,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:09:41,838 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash -152484837, now seen corresponding path program 1 times [2021-12-21 11:09:41,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80771032] [2021-12-21 11:09:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:41,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 218 proven. 113 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 11:09:42,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80771032] [2021-12-21 11:09:42,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80771032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:09:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574283162] [2021-12-21 11:09:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:42,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:09:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:09:42,089 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) [2021-12-21 11:09:42,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:09:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:09:42,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:09:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-21 11:09:42,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:09:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574283162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:42,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:09:42,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:09:42,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627067480] [2021-12-21 11:09:42,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:42,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:42,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:42,830 INFO L87 Difference]: Start difference. First operand 75978 states and 83206 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:45,708 INFO L93 Difference]: Finished difference Result 151165 states and 165617 transitions. [2021-12-21 11:09:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 353 [2021-12-21 11:09:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:45,792 INFO L225 Difference]: With dead ends: 151165 [2021-12-21 11:09:45,792 INFO L226 Difference]: Without dead ends: 75976 [2021-12-21 11:09:45,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:45,824 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 1112 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:45,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1420 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:09:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75976 states. [2021-12-21 11:09:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75976 to 75975. [2021-12-21 11:09:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75975 states, 75974 states have (on average 1.0758680601258326) internal successors, (81738), 75974 states have internal predecessors, (81738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75975 states to 75975 states and 81738 transitions. [2021-12-21 11:09:46,550 INFO L78 Accepts]: Start accepts. Automaton has 75975 states and 81738 transitions. Word has length 353 [2021-12-21 11:09:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:46,551 INFO L470 AbstractCegarLoop]: Abstraction has 75975 states and 81738 transitions. [2021-12-21 11:09:46,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 75975 states and 81738 transitions. [2021-12-21 11:09:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-21 11:09:46,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:46,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:46,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:09:46,771 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,SelfDestructingSolverStorable10 [2021-12-21 11:09:46,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2109393606, now seen corresponding path program 1 times [2021-12-21 11:09:46,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:46,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902217859] [2021-12-21 11:09:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:46,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-21 11:09:47,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:47,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902217859] [2021-12-21 11:09:47,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902217859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:47,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:47,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:47,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528591110] [2021-12-21 11:09:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:47,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:47,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:47,078 INFO L87 Difference]: Start difference. First operand 75975 states and 81738 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:50,297 INFO L93 Difference]: Finished difference Result 171631 states and 185876 transitions. [2021-12-21 11:09:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 383 [2021-12-21 11:09:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:50,406 INFO L225 Difference]: With dead ends: 171631 [2021-12-21 11:09:50,406 INFO L226 Difference]: Without dead ends: 96445 [2021-12-21 11:09:50,449 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 [2021-12-21 11:09:50,450 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 891 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:50,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 881 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:09:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96445 states. [2021-12-21 11:09:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96445 to 93279. [2021-12-21 11:09:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93279 states, 93278 states have (on average 1.08082291644332) internal successors, (100817), 93278 states have internal predecessors, (100817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93279 states to 93279 states and 100817 transitions. [2021-12-21 11:09:51,406 INFO L78 Accepts]: Start accepts. Automaton has 93279 states and 100817 transitions. Word has length 383 [2021-12-21 11:09:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:51,407 INFO L470 AbstractCegarLoop]: Abstraction has 93279 states and 100817 transitions. [2021-12-21 11:09:51,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 93279 states and 100817 transitions. [2021-12-21 11:09:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-21 11:09:51,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:51,413 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:51,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:09:51,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash 66240533, now seen corresponding path program 1 times [2021-12-21 11:09:51,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:51,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517759312] [2021-12-21 11:09:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:51,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:09:51,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517759312] [2021-12-21 11:09:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517759312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363584787] [2021-12-21 11:09:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:51,526 INFO L87 Difference]: Start difference. First operand 93279 states and 100817 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:54,958 INFO L93 Difference]: Finished difference Result 185777 states and 200858 transitions. [2021-12-21 11:09:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 421 [2021-12-21 11:09:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:55,065 INFO L225 Difference]: With dead ends: 185777 [2021-12-21 11:09:55,065 INFO L226 Difference]: Without dead ends: 93287 [2021-12-21 11:09:55,105 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 [2021-12-21 11:09:55,105 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 794 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:55,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1841 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:09:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93287 states. [2021-12-21 11:09:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93287 to 92482. [2021-12-21 11:09:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92482 states, 92481 states have (on average 1.0581200462797764) internal successors, (97856), 92481 states have internal predecessors, (97856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92482 states to 92482 states and 97856 transitions. [2021-12-21 11:09:56,127 INFO L78 Accepts]: Start accepts. Automaton has 92482 states and 97856 transitions. Word has length 421 [2021-12-21 11:09:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:56,128 INFO L470 AbstractCegarLoop]: Abstraction has 92482 states and 97856 transitions. [2021-12-21 11:09:56,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 92482 states and 97856 transitions. [2021-12-21 11:09:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-12-21 11:09:56,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:56,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:56,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:09:56,136 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1419491106, now seen corresponding path program 1 times [2021-12-21 11:09:56,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:56,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713925559] [2021-12-21 11:09:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:56,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 287 proven. 113 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 11:09:56,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713925559] [2021-12-21 11:09:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713925559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:09:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148084067] [2021-12-21 11:09:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:56,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:09:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:09:56,499 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) [2021-12-21 11:09:56,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:09:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:09:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:09:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-21 11:09:57,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:09:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148084067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:57,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:09:57,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:09:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135126145] [2021-12-21 11:09:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:57,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:57,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:57,231 INFO L87 Difference]: Start difference. First operand 92482 states and 97856 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)