./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label09.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 d7f66091a22b7f33dbae7f0078b7d76412336b82f61d79dbfed76c4950c4dfdc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:44:33,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:44:33,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:44:33,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:44:33,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:44:33,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:44:33,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:44:33,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:44:33,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:44:33,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:44:33,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:44:33,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:44:33,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:44:33,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:44:33,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:44:33,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:44:33,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:44:33,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:44:33,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:44:33,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:44:33,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:44:33,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:44:33,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:44:33,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:44:33,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:44:33,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:44:33,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:44:33,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:44:33,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:44:33,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:44:33,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:44:33,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:44:33,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:44:33,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:44:33,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:44:33,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:44:33,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:44:33,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:44:33,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:44:33,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:44:33,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:44:33,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:44:33,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:44:33,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:44:33,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:44:33,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:44:33,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:44:33,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:44:33,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:44:33,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:44:33,545 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:44:33,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:44:33,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:44:33,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:44:33,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:44:33,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:44:33,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:44:33,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:44:33,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:44:33,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:44:33,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:33,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:44:33,549 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:44:33,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:44:33,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:44:33,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7f66091a22b7f33dbae7f0078b7d76412336b82f61d79dbfed76c4950c4dfdc [2021-12-15 22:44:33,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:44:33,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:44:33,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:44:33,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:44:33,754 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:44:33,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label09.c [2021-12-15 22:44:33,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f701c6/8bd555dba8d34fa680995372475869b8/FLAG6f1c57426 [2021-12-15 22:44:34,305 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:44:34,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label09.c [2021-12-15 22:44:34,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f701c6/8bd555dba8d34fa680995372475869b8/FLAG6f1c57426 [2021-12-15 22:44:34,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f701c6/8bd555dba8d34fa680995372475869b8 [2021-12-15 22:44:34,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:44:34,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:44:34,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:34,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:44:34,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:44:34,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:34" (1/1) ... [2021-12-15 22:44:34,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac9135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:34, skipping insertion in model container [2021-12-15 22:44:34,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:44:34" (1/1) ... [2021-12-15 22:44:34,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:44:34,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:44:34,886 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_label09.c[8517,8530] [2021-12-15 22:44:35,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:35,497 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:44:35,519 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_label09.c[8517,8530] [2021-12-15 22:44:35,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:44:35,856 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:44:35,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35 WrapperNode [2021-12-15 22:44:35,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:44:35,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:35,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:44:35,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:44:35,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:35,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,381 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:44:36,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:44:36,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:44:36,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:44:36,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:44:36,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:44:36,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:44:36,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:44:36,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:44:36,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (1/1) ... [2021-12-15 22:44:36,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:44:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:44:36,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:44:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:44:37,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:44:37,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:44:37,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:44:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:44:37,108 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:44:37,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:44:40,415 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:44:40,433 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:44:40,433 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:44:40,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:40 BoogieIcfgContainer [2021-12-15 22:44:40,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:44:40,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:44:40,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:44:40,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:44:40,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:44:34" (1/3) ... [2021-12-15 22:44:40,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199aa63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:40, skipping insertion in model container [2021-12-15 22:44:40,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:44:35" (2/3) ... [2021-12-15 22:44:40,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199aa63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:44:40, skipping insertion in model container [2021-12-15 22:44:40,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:44:40" (3/3) ... [2021-12-15 22:44:40,445 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label09.c [2021-12-15 22:44:40,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:44:40,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:44:40,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:44:40,502 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:44:40,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:44:40,526 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) [2021-12-15 22:44:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 22:44:40,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:40,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:40,532 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash -634083006, now seen corresponding path program 1 times [2021-12-15 22:44:40,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:40,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586551754] [2021-12-15 22:44:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:40,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:40,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586551754] [2021-12-15 22:44:40,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586551754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:40,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:40,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737117274] [2021-12-15 22:44:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:40,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:40,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:40,803 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 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:46,192 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-15 22:44:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-15 22:44:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:46,222 INFO L225 Difference]: With dead ends: 3829 [2021-12-15 22:44:46,222 INFO L226 Difference]: Without dead ends: 2664 [2021-12-15 22:44:46,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:44:46,234 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2670 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2670 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:46,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2670 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 22:44:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-15 22:44:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-15 22:44:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-15 22:44:46,360 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 60 [2021-12-15 22:44:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:46,361 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-15 22:44:46,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-15 22:44:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 22:44:46,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:46,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:46,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:44:46,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:46,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1716628499, now seen corresponding path program 1 times [2021-12-15 22:44:46,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:46,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516321812] [2021-12-15 22:44:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:46,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:46,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:46,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516321812] [2021-12-15 22:44:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516321812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:46,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058749501] [2021-12-15 22:44:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:46,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:44:46,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:44:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:46,563 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:52,117 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-12-15 22:44:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:44:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-15 22:44:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:52,136 INFO L225 Difference]: With dead ends: 7864 [2021-12-15 22:44:52,136 INFO L226 Difference]: Without dead ends: 5990 [2021-12-15 22:44:52,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:44:52,141 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1619 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:52,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 22:44:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-12-15 22:44:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-12-15 22:44:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-12-15 22:44:52,234 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 185 [2021-12-15 22:44:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:52,235 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-12-15 22:44:52,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-12-15 22:44:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-15 22:44:52,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:52,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:52,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:44:52,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1412826982, now seen corresponding path program 1 times [2021-12-15 22:44:52,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906954246] [2021-12-15 22:44:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:44:52,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906954246] [2021-12-15 22:44:52,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906954246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:52,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:52,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868288843] [2021-12-15 22:44:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:52,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:52,389 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:55,356 INFO L93 Difference]: Finished difference Result 15685 states and 23389 transitions. [2021-12-15 22:44:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 227 [2021-12-15 22:44:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:55,390 INFO L225 Difference]: With dead ends: 15685 [2021-12-15 22:44:55,390 INFO L226 Difference]: Without dead ends: 10615 [2021-12-15 22:44:55,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:55,401 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 918 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 916 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:44:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2021-12-15 22:44:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10608. [2021-12-15 22:44:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-12-15 22:44:55,568 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 227 [2021-12-15 22:44:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:55,569 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-12-15 22:44:55,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-12-15 22:44:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 22:44:55,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:55,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:55,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:44:55,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2124213545, now seen corresponding path program 1 times [2021-12-15 22:44:55,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773987368] [2021-12-15 22:44:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:55,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:44:55,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:55,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773987368] [2021-12-15 22:44:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773987368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:55,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:55,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:44:55,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114929258] [2021-12-15 22:44:55,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:55,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:55,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:55,679 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:44:58,359 INFO L93 Difference]: Finished difference Result 29087 states and 40052 transitions. [2021-12-15 22:44:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:44:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 [2021-12-15 22:44:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:44:58,420 INFO L225 Difference]: With dead ends: 29087 [2021-12-15 22:44:58,420 INFO L226 Difference]: Without dead ends: 19268 [2021-12-15 22:44:58,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:58,447 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:44:58,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 987 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:44:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-12-15 22:44:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 17691. [2021-12-15 22:44:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17691 states, 17690 states have (on average 1.2688524590163934) internal successors, (22446), 17690 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17691 states to 17691 states and 22446 transitions. [2021-12-15 22:44:58,668 INFO L78 Accepts]: Start accepts. Automaton has 17691 states and 22446 transitions. Word has length 241 [2021-12-15 22:44:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:44:58,669 INFO L470 AbstractCegarLoop]: Abstraction has 17691 states and 22446 transitions. [2021-12-15 22:44:58,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:44:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17691 states and 22446 transitions. [2021-12-15 22:44:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 22:44:58,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:44:58,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:44:58,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:44:58,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:44:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:44:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1531307702, now seen corresponding path program 1 times [2021-12-15 22:44:58,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:44:58,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511024538] [2021-12-15 22:44:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:44:58,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:44:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:44:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:44:58,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:44:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511024538] [2021-12-15 22:44:58,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511024538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:44:58,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:44:58,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:44:58,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599703219] [2021-12-15 22:44:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:44:58,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:44:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:44:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:44:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:44:58,754 INFO L87 Difference]: Start difference. First operand 17691 states and 22446 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:01,597 INFO L93 Difference]: Finished difference Result 51136 states and 65282 transitions. [2021-12-15 22:45:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 259 [2021-12-15 22:45:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:01,662 INFO L225 Difference]: With dead ends: 51136 [2021-12-15 22:45:01,663 INFO L226 Difference]: Without dead ends: 34234 [2021-12-15 22:45:01,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:01,686 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 857 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:01,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 909 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:45:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34234 states. [2021-12-15 22:45:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34234 to 33436. [2021-12-15 22:45:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 1.208464184238074) internal successors, (40405), 33435 states have internal predecessors, (40405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 40405 transitions. [2021-12-15 22:45:02,198 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 40405 transitions. Word has length 259 [2021-12-15 22:45:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:02,199 INFO L470 AbstractCegarLoop]: Abstraction has 33436 states and 40405 transitions. [2021-12-15 22:45:02,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:02,201 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 40405 transitions. [2021-12-15 22:45:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 22:45:02,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:02,207 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:02,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:45:02,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash 404201984, now seen corresponding path program 1 times [2021-12-15 22:45:02,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647128824] [2021-12-15 22:45:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:02,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:45:02,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647128824] [2021-12-15 22:45:02,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647128824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:02,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:02,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:02,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24923244] [2021-12-15 22:45:02,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:02,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:02,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:02,337 INFO L87 Difference]: Start difference. First operand 33436 states and 40405 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:05,422 INFO L93 Difference]: Finished difference Result 80260 states and 98517 transitions. [2021-12-15 22:45:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 348 [2021-12-15 22:45:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:05,489 INFO L225 Difference]: With dead ends: 80260 [2021-12-15 22:45:05,490 INFO L226 Difference]: Without dead ends: 47613 [2021-12-15 22:45:05,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:05,526 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 810 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:05,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:45:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47613 states. [2021-12-15 22:45:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47613 to 46820. [2021-12-15 22:45:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46820 states, 46819 states have (on average 1.1730494030201415) internal successors, (54921), 46819 states have internal predecessors, (54921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46820 states to 46820 states and 54921 transitions. [2021-12-15 22:45:06,083 INFO L78 Accepts]: Start accepts. Automaton has 46820 states and 54921 transitions. Word has length 348 [2021-12-15 22:45:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:06,083 INFO L470 AbstractCegarLoop]: Abstraction has 46820 states and 54921 transitions. [2021-12-15 22:45:06,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 46820 states and 54921 transitions. [2021-12-15 22:45:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-15 22:45:06,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:06,089 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:06,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:45:06,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1720125798, now seen corresponding path program 1 times [2021-12-15 22:45:06,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:06,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079555625] [2021-12-15 22:45:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:06,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 22:45:06,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079555625] [2021-12-15 22:45:06,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079555625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:06,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:06,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:06,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459513721] [2021-12-15 22:45:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:06,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:45:06,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:45:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:45:06,181 INFO L87 Difference]: Start difference. First operand 46820 states and 54921 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) [2021-12-15 22:45:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:11,989 INFO L93 Difference]: Finished difference Result 126117 states and 149324 transitions. [2021-12-15 22:45:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:45:11,990 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 357 [2021-12-15 22:45:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:12,090 INFO L225 Difference]: With dead ends: 126117 [2021-12-15 22:45:12,090 INFO L226 Difference]: Without dead ends: 80086 [2021-12-15 22:45:12,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:45:12,119 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 1746 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6043 mSolverCounterSat, 1203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 7246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 6043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:12,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1746 Valid, 662 Invalid, 7246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1203 Valid, 6043 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 22:45:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80086 states. [2021-12-15 22:45:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80086 to 78386. [2021-12-15 22:45:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78386 states, 78385 states have (on average 1.169279836703451) internal successors, (91654), 78385 states have internal predecessors, (91654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78386 states to 78386 states and 91654 transitions. [2021-12-15 22:45:12,903 INFO L78 Accepts]: Start accepts. Automaton has 78386 states and 91654 transitions. Word has length 357 [2021-12-15 22:45:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:12,904 INFO L470 AbstractCegarLoop]: Abstraction has 78386 states and 91654 transitions. [2021-12-15 22:45:12,904 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) [2021-12-15 22:45:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 78386 states and 91654 transitions. [2021-12-15 22:45:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-15 22:45:12,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:12,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:45:12,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:45:12,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1072524365, now seen corresponding path program 1 times [2021-12-15 22:45:12,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699094246] [2021-12-15 22:45:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:12,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 22:45:12,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699094246] [2021-12-15 22:45:12,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699094246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:12,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:12,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:12,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128755261] [2021-12-15 22:45:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:12,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:12,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:12,995 INFO L87 Difference]: Start difference. First operand 78386 states and 91654 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:16,522 INFO L93 Difference]: Finished difference Result 176485 states and 206095 transitions. [2021-12-15 22:45:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2021-12-15 22:45:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:16,640 INFO L225 Difference]: With dead ends: 176485 [2021-12-15 22:45:16,640 INFO L226 Difference]: Without dead ends: 98888 [2021-12-15 22:45:16,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:16,670 INFO L933 BasicCegarLoop]: 1850 mSDtfsCounter, 753 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:16,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1991 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:45:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98888 states. [2021-12-15 22:45:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98888 to 98852. [2021-12-15 22:45:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98852 states, 98851 states have (on average 1.1532002711151126) internal successors, (113995), 98851 states have internal predecessors, (113995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98852 states to 98852 states and 113995 transitions. [2021-12-15 22:45:17,785 INFO L78 Accepts]: Start accepts. Automaton has 98852 states and 113995 transitions. Word has length 357 [2021-12-15 22:45:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:17,785 INFO L470 AbstractCegarLoop]: Abstraction has 98852 states and 113995 transitions. [2021-12-15 22:45:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 98852 states and 113995 transitions. [2021-12-15 22:45:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-15 22:45:17,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:17,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:17,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:45:17,794 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -827823863, now seen corresponding path program 1 times [2021-12-15 22:45:17,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998205303] [2021-12-15 22:45:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:17,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 287 proven. 110 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-15 22:45:18,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:18,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998205303] [2021-12-15 22:45:18,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998205303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:45:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068852884] [2021-12-15 22:45:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:18,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:45:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:45:18,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:45:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:45:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:45:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:45:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-15 22:45:18,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:45:18,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068852884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:18,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:45:18,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:45:18,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793071102] [2021-12-15 22:45:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:18,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:18,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:45:18,876 INFO L87 Difference]: Start difference. First operand 98852 states and 113995 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) [2021-12-15 22:45:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:21,961 INFO L93 Difference]: Finished difference Result 196913 states and 227195 transitions. [2021-12-15 22:45:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:21,961 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 386 [2021-12-15 22:45:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:22,109 INFO L225 Difference]: With dead ends: 196913 [2021-12-15 22:45:22,110 INFO L226 Difference]: Without dead ends: 98850 [2021-12-15 22:45:22,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:45:22,135 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:22,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1443 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:45:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98850 states. [2021-12-15 22:45:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98850 to 98849. [2021-12-15 22:45:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98849 states, 98848 states have (on average 1.1181308675946908) internal successors, (110525), 98848 states have internal predecessors, (110525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98849 states to 98849 states and 110525 transitions. [2021-12-15 22:45:23,323 INFO L78 Accepts]: Start accepts. Automaton has 98849 states and 110525 transitions. Word has length 386 [2021-12-15 22:45:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:23,323 INFO L470 AbstractCegarLoop]: Abstraction has 98849 states and 110525 transitions. [2021-12-15 22:45:23,324 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) [2021-12-15 22:45:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 98849 states and 110525 transitions. [2021-12-15 22:45:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-15 22:45:23,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:23,335 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 22:45:23,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:45:23,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:45:23,550 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1865353172, now seen corresponding path program 1 times [2021-12-15 22:45:23,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141151307] [2021-12-15 22:45:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:23,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 458 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:45:23,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141151307] [2021-12-15 22:45:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141151307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:23,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:23,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897809068] [2021-12-15 22:45:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:23,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:45:23,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:45:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:23,705 INFO L87 Difference]: Start difference. First operand 98849 states and 110525 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:45:27,467 INFO L93 Difference]: Finished difference Result 212664 states and 240060 transitions. [2021-12-15 22:45:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:45:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 454 [2021-12-15 22:45:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:45:27,614 INFO L225 Difference]: With dead ends: 212664 [2021-12-15 22:45:27,614 INFO L226 Difference]: Without dead ends: 114604 [2021-12-15 22:45:27,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:45:27,662 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 790 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:45:27,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 1896 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 22:45:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114604 states. [2021-12-15 22:45:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114604 to 113010. [2021-12-15 22:45:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113010 states, 113009 states have (on average 1.103053739082728) internal successors, (124655), 113009 states have internal predecessors, (124655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113010 states to 113010 states and 124655 transitions. [2021-12-15 22:45:29,160 INFO L78 Accepts]: Start accepts. Automaton has 113010 states and 124655 transitions. Word has length 454 [2021-12-15 22:45:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:45:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 113010 states and 124655 transitions. [2021-12-15 22:45:29,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:45:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 113010 states and 124655 transitions. [2021-12-15 22:45:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-12-15 22:45:29,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:45:29,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:45:29,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:45:29,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:45:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:45:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1739277938, now seen corresponding path program 1 times [2021-12-15 22:45:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:45:29,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966960778] [2021-12-15 22:45:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:45:29,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:45:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:45:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 22:45:29,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:45:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966960778] [2021-12-15 22:45:29,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966960778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:45:29,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:45:29,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:45:29,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783299660] [2021-12-15 22:45:29,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:45:29,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:45:29,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:45:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:45:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:45:29,310 INFO L87 Difference]: Start difference. First operand 113010 states and 124655 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)