./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label57.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label57.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 0e82c46cc7c6a1ae6528ac072c5cfd2ae759a81ebaffa85f079f32af9f51d4a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:23:57,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:23:57,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:23:57,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:23:57,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:23:57,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:23:57,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:23:57,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:23:57,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:23:57,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:23:57,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:23:57,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:23:57,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:23:57,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:23:57,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:23:57,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:23:57,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:23:57,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:23:57,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:23:57,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:23:57,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:23:57,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:23:57,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:23:57,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:23:57,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:23:57,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:23:57,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:23:57,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:23:57,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:23:57,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:23:57,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:23:57,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:23:57,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:23:57,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:23:57,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:23:57,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:23:57,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:23:57,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:23:57,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:23:57,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:23:57,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:23:57,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:23:57,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:23:57,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:23:57,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:23:57,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:23:57,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:23:57,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:23:57,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:23:57,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:23:57,541 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:23:57,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:23:57,541 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:23:57,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:23:57,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:23:57,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:23:57,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:23:57,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:23:57,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:23:57,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:23:57,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:23:57,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:23:57,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:23:57,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:23:57,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:23:57,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:23:57,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:23:57,545 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:23:57,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:23:57,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:23:57,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:23:57,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e82c46cc7c6a1ae6528ac072c5cfd2ae759a81ebaffa85f079f32af9f51d4a1 [2021-12-21 11:23:57,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:23:57,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:23:57,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:23:57,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:23:57,735 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:23:57,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label57.c [2021-12-21 11:23:57,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640d7d0ce/ecd056e3400a4c259255f0fc1cbd99ca/FLAG4ab922472 [2021-12-21 11:23:58,283 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:23:58,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label57.c [2021-12-21 11:23:58,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640d7d0ce/ecd056e3400a4c259255f0fc1cbd99ca/FLAG4ab922472 [2021-12-21 11:23:58,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640d7d0ce/ecd056e3400a4c259255f0fc1cbd99ca [2021-12-21 11:23:58,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:23:58,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:23:58,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:23:58,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:23:58,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:23:58,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:23:58" (1/1) ... [2021-12-21 11:23:58,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79253f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:58, skipping insertion in model container [2021-12-21 11:23:58,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:23:58" (1/1) ... [2021-12-21 11:23:58,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:23:58,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:23:59,084 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/Problem17_label57.c[2672,2685] [2021-12-21 11:23:59,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:23:59,523 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:23:59,533 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/Problem17_label57.c[2672,2685] [2021-12-21 11:23:59,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:23:59,761 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:23:59,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59 WrapperNode [2021-12-21 11:23:59,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:23:59,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:23:59,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:23:59,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:23:59,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:23:59,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,013 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-21 11:24:00,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:24:00,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:24:00,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:24:00,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:24:00,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:24:00,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:24:00,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:24:00,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:24:00,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (1/1) ... [2021-12-21 11:24:00,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:24:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:24:00,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:24:00,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:24:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:24:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:24:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:24:00,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:24:00,470 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:24:00,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:24:02,579 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:24:02,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:24:02,597 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:24:02,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:24:02 BoogieIcfgContainer [2021-12-21 11:24:02,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:24:02,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:24:02,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:24:02,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:24:02,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:23:58" (1/3) ... [2021-12-21 11:24:02,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41179873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:24:02, skipping insertion in model container [2021-12-21 11:24:02,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:23:59" (2/3) ... [2021-12-21 11:24:02,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41179873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:24:02, skipping insertion in model container [2021-12-21 11:24:02,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:24:02" (3/3) ... [2021-12-21 11:24:02,634 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label57.c [2021-12-21 11:24:02,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:24:02,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:24:02,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:24:02,674 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:24:02,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:24:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 11:24:02,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:02,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:02,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2021-12-21 11:24:02,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943319160] [2021-12-21 11:24:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:02,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:02,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:02,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943319160] [2021-12-21 11:24:02,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943319160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:02,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:02,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:24:02,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21787981] [2021-12-21 11:24:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:02,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:02,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:02,846 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:05,446 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-21 11:24:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-21 11:24:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:05,462 INFO L225 Difference]: With dead ends: 1667 [2021-12-21 11:24:05,462 INFO L226 Difference]: Without dead ends: 998 [2021-12-21 11:24:05,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:05,472 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 528 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:05,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:24:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-21 11:24:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-21 11:24:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-21 11:24:05,543 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 17 [2021-12-21 11:24:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:05,544 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-21 11:24:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-21 11:24:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 11:24:05,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:05,548 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:24:05,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:24:05,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1420614467, now seen corresponding path program 1 times [2021-12-21 11:24:05,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:05,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352587053] [2021-12-21 11:24:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:05,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:05,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352587053] [2021-12-21 11:24:05,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352587053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:05,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:05,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:24:05,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168705399] [2021-12-21 11:24:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:05,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:05,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:05,713 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:07,632 INFO L93 Difference]: Finished difference Result 2843 states and 4882 transitions. [2021-12-21 11:24:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-21 11:24:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:07,640 INFO L225 Difference]: With dead ends: 2843 [2021-12-21 11:24:07,641 INFO L226 Difference]: Without dead ends: 1863 [2021-12-21 11:24:07,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:07,648 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:07,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 495 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:24:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-21 11:24:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1857. [2021-12-21 11:24:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4552801724137931) internal successors, (2701), 1856 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2701 transitions. [2021-12-21 11:24:07,691 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2701 transitions. Word has length 82 [2021-12-21 11:24:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:07,692 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2701 transitions. [2021-12-21 11:24:07,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2701 transitions. [2021-12-21 11:24:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 11:24:07,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:07,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:24:07,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:24:07,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1820580012, now seen corresponding path program 1 times [2021-12-21 11:24:07,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937605265] [2021-12-21 11:24:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:07,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:07,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937605265] [2021-12-21 11:24:07,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937605265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:07,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:07,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:24:07,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642565412] [2021-12-21 11:24:07,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:07,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:07,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:07,760 INFO L87 Difference]: Start difference. First operand 1857 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:09,397 INFO L93 Difference]: Finished difference Result 5425 states and 7895 transitions. [2021-12-21 11:24:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:09,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-21 11:24:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:09,408 INFO L225 Difference]: With dead ends: 5425 [2021-12-21 11:24:09,408 INFO L226 Difference]: Without dead ends: 3570 [2021-12-21 11:24:09,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:09,412 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:09,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:24:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-21 11:24:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2714. [2021-12-21 11:24:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.315886472539624) internal successors, (3570), 2713 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3570 transitions. [2021-12-21 11:24:09,478 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3570 transitions. Word has length 88 [2021-12-21 11:24:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:09,480 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3570 transitions. [2021-12-21 11:24:09,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3570 transitions. [2021-12-21 11:24:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-21 11:24:09,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:09,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:09,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:24:09,490 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:09,490 INFO L85 PathProgramCache]: Analyzing trace with hash -872972308, now seen corresponding path program 1 times [2021-12-21 11:24:09,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:09,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359456519] [2021-12-21 11:24:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:09,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:09,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359456519] [2021-12-21 11:24:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359456519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:09,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:09,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:24:09,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427698524] [2021-12-21 11:24:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:09,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:24:09,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:24:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:24:09,653 INFO L87 Difference]: Start difference. First operand 2714 states and 3570 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:11,753 INFO L93 Difference]: Finished difference Result 7159 states and 9653 transitions. [2021-12-21 11:24:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:24:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-12-21 11:24:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:11,768 INFO L225 Difference]: With dead ends: 7159 [2021-12-21 11:24:11,768 INFO L226 Difference]: Without dead ends: 4447 [2021-12-21 11:24:11,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:24:11,783 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1658 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:11,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 843 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:24:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2021-12-21 11:24:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 4424. [2021-12-21 11:24:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.2912050644359032) internal successors, (5711), 4423 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5711 transitions. [2021-12-21 11:24:11,874 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5711 transitions. Word has length 165 [2021-12-21 11:24:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 4424 states and 5711 transitions. [2021-12-21 11:24:11,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5711 transitions. [2021-12-21 11:24:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-21 11:24:11,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:11,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:11,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:24:11,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 259839131, now seen corresponding path program 1 times [2021-12-21 11:24:11,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:11,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724890695] [2021-12-21 11:24:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:11,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:12,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724890695] [2021-12-21 11:24:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724890695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:24:12,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834071444] [2021-12-21 11:24:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:12,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:24:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:24:12,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:24:12,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:24:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:24:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:24:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:12,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:24:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834071444] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:24:13,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:24:13,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 11:24:13,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051500349] [2021-12-21 11:24:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:24:13,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:24:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:24:13,101 INFO L87 Difference]: Start difference. First operand 4424 states and 5711 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:16,488 INFO L93 Difference]: Finished difference Result 13992 states and 18566 transitions. [2021-12-21 11:24:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:24:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-21 11:24:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:16,510 INFO L225 Difference]: With dead ends: 13992 [2021-12-21 11:24:16,510 INFO L226 Difference]: Without dead ends: 8693 [2021-12-21 11:24:16,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:24:16,517 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1123 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1397 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:16,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 152 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 11:24:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states. [2021-12-21 11:24:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8693 to 8688. [2021-12-21 11:24:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8688 states, 8687 states have (on average 1.2229768619776678) internal successors, (10624), 8687 states have internal predecessors, (10624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 10624 transitions. [2021-12-21 11:24:16,621 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 10624 transitions. Word has length 171 [2021-12-21 11:24:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:16,622 INFO L470 AbstractCegarLoop]: Abstraction has 8688 states and 10624 transitions. [2021-12-21 11:24:16,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 10624 transitions. [2021-12-21 11:24:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-21 11:24:16,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:16,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:16,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:24:16,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:24:16,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash -931351970, now seen corresponding path program 1 times [2021-12-21 11:24:16,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:16,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021341857] [2021-12-21 11:24:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:16,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 44 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:24:16,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:16,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021341857] [2021-12-21 11:24:16,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021341857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:24:16,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428628847] [2021-12-21 11:24:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:16,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:24:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:24:16,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:24:16,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:24:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:24:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:24:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 170 proven. 73 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 11:24:17,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:24:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 11:24:17,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428628847] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:24:17,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:24:17,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-21 11:24:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309298286] [2021-12-21 11:24:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:17,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:24:17,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:24:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:24:17,908 INFO L87 Difference]: Start difference. First operand 8688 states and 10624 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:20,521 INFO L93 Difference]: Finished difference Result 24222 states and 29723 transitions. [2021-12-21 11:24:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:24:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 245 [2021-12-21 11:24:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:20,565 INFO L225 Difference]: With dead ends: 24222 [2021-12-21 11:24:20,565 INFO L226 Difference]: Without dead ends: 15536 [2021-12-21 11:24:20,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 485 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:24:20,574 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 838 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 194 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:24:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-12-21 11:24:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 15530. [2021-12-21 11:24:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15530 states, 15529 states have (on average 1.2101229956854918) internal successors, (18792), 15529 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15530 states to 15530 states and 18792 transitions. [2021-12-21 11:24:20,752 INFO L78 Accepts]: Start accepts. Automaton has 15530 states and 18792 transitions. Word has length 245 [2021-12-21 11:24:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:20,753 INFO L470 AbstractCegarLoop]: Abstraction has 15530 states and 18792 transitions. [2021-12-21 11:24:20,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15530 states and 18792 transitions. [2021-12-21 11:24:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-21 11:24:20,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:20,758 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-21 11:24:20,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:24:20,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 11:24:20,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1067126678, now seen corresponding path program 1 times [2021-12-21 11:24:20,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813470767] [2021-12-21 11:24:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:20,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 11:24:21,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813470767] [2021-12-21 11:24:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813470767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:21,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:21,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:21,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690196700] [2021-12-21 11:24:21,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:21,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:21,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:21,100 INFO L87 Difference]: Start difference. First operand 15530 states and 18792 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:22,737 INFO L93 Difference]: Finished difference Result 40443 states and 49307 transitions. [2021-12-21 11:24:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 [2021-12-21 11:24:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:22,774 INFO L225 Difference]: With dead ends: 40443 [2021-12-21 11:24:22,775 INFO L226 Difference]: Without dead ends: 24913 [2021-12-21 11:24:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:22,790 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 434 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:22,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 351 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:24:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24913 states. [2021-12-21 11:24:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24913 to 22343. [2021-12-21 11:24:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22343 states, 22342 states have (on average 1.1988183689911378) internal successors, (26784), 22342 states have internal predecessors, (26784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22343 states to 22343 states and 26784 transitions. [2021-12-21 11:24:23,024 INFO L78 Accepts]: Start accepts. Automaton has 22343 states and 26784 transitions. Word has length 348 [2021-12-21 11:24:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 22343 states and 26784 transitions. [2021-12-21 11:24:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22343 states and 26784 transitions. [2021-12-21 11:24:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-21 11:24:23,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:23,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-21 11:24:23,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:24:23,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -359571855, now seen corresponding path program 1 times [2021-12-21 11:24:23,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:23,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977532894] [2021-12-21 11:24:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:23,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 11:24:23,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977532894] [2021-12-21 11:24:23,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977532894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:23,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:23,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:23,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215000285] [2021-12-21 11:24:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:23,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:23,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:23,195 INFO L87 Difference]: Start difference. First operand 22343 states and 26784 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:24,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:24,979 INFO L93 Difference]: Finished difference Result 53677 states and 64570 transitions. [2021-12-21 11:24:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 350 [2021-12-21 11:24:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:25,030 INFO L225 Difference]: With dead ends: 53677 [2021-12-21 11:24:25,030 INFO L226 Difference]: Without dead ends: 31336 [2021-12-21 11:24:25,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:25,054 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 428 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:25,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 731 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:24:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31336 states. [2021-12-21 11:24:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31336 to 30027. [2021-12-21 11:24:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30027 states, 30026 states have (on average 1.2049224005861587) internal successors, (36179), 30026 states have internal predecessors, (36179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30027 states to 30027 states and 36179 transitions. [2021-12-21 11:24:25,429 INFO L78 Accepts]: Start accepts. Automaton has 30027 states and 36179 transitions. Word has length 350 [2021-12-21 11:24:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:25,429 INFO L470 AbstractCegarLoop]: Abstraction has 30027 states and 36179 transitions. [2021-12-21 11:24:25,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30027 states and 36179 transitions. [2021-12-21 11:24:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-21 11:24:25,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:25,435 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:25,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:24:25,435 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -60944868, now seen corresponding path program 1 times [2021-12-21 11:24:25,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:25,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979582962] [2021-12-21 11:24:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 11:24:25,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979582962] [2021-12-21 11:24:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979582962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:25,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:25,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:25,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127975989] [2021-12-21 11:24:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:25,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:25,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:25,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:25,550 INFO L87 Difference]: Start difference. First operand 30027 states and 36179 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:27,545 INFO L93 Difference]: Finished difference Result 80910 states and 96296 transitions. [2021-12-21 11:24:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 351 [2021-12-21 11:24:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:27,667 INFO L225 Difference]: With dead ends: 80910 [2021-12-21 11:24:27,667 INFO L226 Difference]: Without dead ends: 49601 [2021-12-21 11:24:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:27,700 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 446 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:27,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 625 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:24:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49601 states. [2021-12-21 11:24:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49601 to 46191. [2021-12-21 11:24:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46191 states, 46190 states have (on average 1.166161506819658) internal successors, (53865), 46190 states have internal predecessors, (53865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46191 states to 46191 states and 53865 transitions. [2021-12-21 11:24:28,210 INFO L78 Accepts]: Start accepts. Automaton has 46191 states and 53865 transitions. Word has length 351 [2021-12-21 11:24:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 46191 states and 53865 transitions. [2021-12-21 11:24:28,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 46191 states and 53865 transitions. [2021-12-21 11:24:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-21 11:24:28,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:28,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:24:28,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:24:28,218 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 493747939, now seen corresponding path program 1 times [2021-12-21 11:24:28,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070131539] [2021-12-21 11:24:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:28,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 11:24:28,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:28,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070131539] [2021-12-21 11:24:28,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070131539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:28,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:28,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:24:28,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696651847] [2021-12-21 11:24:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:24:28,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:24:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:24:28,324 INFO L87 Difference]: Start difference. First operand 46191 states and 53865 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:31,201 INFO L93 Difference]: Finished difference Result 124790 states and 145084 transitions. [2021-12-21 11:24:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:24:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 355 [2021-12-21 11:24:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:31,280 INFO L225 Difference]: With dead ends: 124790 [2021-12-21 11:24:31,281 INFO L226 Difference]: Without dead ends: 78601 [2021-12-21 11:24:31,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:24:31,310 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 836 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:31,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 181 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:24:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78601 states. [2021-12-21 11:24:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78601 to 75618. [2021-12-21 11:24:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75618 states, 75617 states have (on average 1.1590383114908023) internal successors, (87643), 75617 states have internal predecessors, (87643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75618 states to 75618 states and 87643 transitions. [2021-12-21 11:24:32,304 INFO L78 Accepts]: Start accepts. Automaton has 75618 states and 87643 transitions. Word has length 355 [2021-12-21 11:24:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:32,305 INFO L470 AbstractCegarLoop]: Abstraction has 75618 states and 87643 transitions. [2021-12-21 11:24:32,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 75618 states and 87643 transitions. [2021-12-21 11:24:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-21 11:24:32,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:32,310 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:24:32,310 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -220930497, now seen corresponding path program 1 times [2021-12-21 11:24:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:32,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775698578] [2021-12-21 11:24:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:32,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 317 proven. 82 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-21 11:24:32,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775698578] [2021-12-21 11:24:32,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775698578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:24:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890259419] [2021-12-21 11:24:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:32,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:24:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:24:32,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:24:32,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:24:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:32,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:24:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:24:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-21 11:24:42,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:24:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890259419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:42,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:24:42,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:24:42,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336331542] [2021-12-21 11:24:42,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:42,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:42,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:24:42,206 INFO L87 Difference]: Start difference. First operand 75618 states and 87643 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:42,391 INFO L93 Difference]: Finished difference Result 75635 states and 87660 transitions. [2021-12-21 11:24:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 370 [2021-12-21 11:24:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:42,470 INFO L225 Difference]: With dead ends: 75635 [2021-12-21 11:24:42,471 INFO L226 Difference]: Without dead ends: 75633 [2021-12-21 11:24:42,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:24:42,489 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:42,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 839 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 713 Unchecked, 0.0s Time] [2021-12-21 11:24:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75633 states. [2021-12-21 11:24:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75633 to 75633. [2021-12-21 11:24:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75633 states, 75632 states have (on average 1.1590067696213242) internal successors, (87658), 75632 states have internal predecessors, (87658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75633 states to 75633 states and 87658 transitions. [2021-12-21 11:24:43,240 INFO L78 Accepts]: Start accepts. Automaton has 75633 states and 87658 transitions. Word has length 370 [2021-12-21 11:24:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:43,240 INFO L470 AbstractCegarLoop]: Abstraction has 75633 states and 87658 transitions. [2021-12-21 11:24:43,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 75633 states and 87658 transitions. [2021-12-21 11:24:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-21 11:24:43,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:43,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:24:43,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:24:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:24:43,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -94402040, now seen corresponding path program 1 times [2021-12-21 11:24:43,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834788168] [2021-12-21 11:24:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:43,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-21 11:24:43,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834788168] [2021-12-21 11:24:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834788168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:43,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:43,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:43,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692320033] [2021-12-21 11:24:43,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:43,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:43,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:43,613 INFO L87 Difference]: Start difference. First operand 75633 states and 87658 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:45,814 INFO L93 Difference]: Finished difference Result 161088 states and 186575 transitions. [2021-12-21 11:24:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2021-12-21 11:24:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:45,917 INFO L225 Difference]: With dead ends: 161088 [2021-12-21 11:24:45,917 INFO L226 Difference]: Without dead ends: 85032 [2021-12-21 11:24:45,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:45,956 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 450 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:45,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 854 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:24:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85032 states. [2021-12-21 11:24:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85032 to 85023. [2021-12-21 11:24:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85023 states, 85022 states have (on average 1.1486791653924866) internal successors, (97663), 85022 states have internal predecessors, (97663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85023 states to 85023 states and 97663 transitions. [2021-12-21 11:24:46,969 INFO L78 Accepts]: Start accepts. Automaton has 85023 states and 97663 transitions. Word has length 377 [2021-12-21 11:24:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 85023 states and 97663 transitions. [2021-12-21 11:24:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85023 states and 97663 transitions. [2021-12-21 11:24:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-21 11:24:46,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:46,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:46,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:24:46,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1256554059, now seen corresponding path program 1 times [2021-12-21 11:24:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:46,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638088755] [2021-12-21 11:24:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:46,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 11:24:47,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638088755] [2021-12-21 11:24:47,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638088755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:47,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:47,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:47,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263627482] [2021-12-21 11:24:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:47,089 INFO L87 Difference]: Start difference. First operand 85023 states and 97663 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:49,000 INFO L93 Difference]: Finished difference Result 184500 states and 211542 transitions. [2021-12-21 11:24:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:24:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 414 [2021-12-21 11:24:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:49,144 INFO L225 Difference]: With dead ends: 184500 [2021-12-21 11:24:49,144 INFO L226 Difference]: Without dead ends: 99032 [2021-12-21 11:24:49,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:49,194 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 502 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:49,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 682 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:24:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99032 states. [2021-12-21 11:24:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99032 to 99024. [2021-12-21 11:24:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99024 states, 99023 states have (on average 1.1178413095947406) internal successors, (110692), 99023 states have internal predecessors, (110692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99024 states to 99024 states and 110692 transitions. [2021-12-21 11:24:50,694 INFO L78 Accepts]: Start accepts. Automaton has 99024 states and 110692 transitions. Word has length 414 [2021-12-21 11:24:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:50,695 INFO L470 AbstractCegarLoop]: Abstraction has 99024 states and 110692 transitions. [2021-12-21 11:24:50,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 99024 states and 110692 transitions. [2021-12-21 11:24:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-21 11:24:50,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:50,708 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:24:50,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:24:50,709 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1285746988, now seen corresponding path program 1 times [2021-12-21 11:24:50,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450419639] [2021-12-21 11:24:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:50,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-21 11:24:51,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450419639] [2021-12-21 11:24:51,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450419639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:51,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:51,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:24:51,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417431650] [2021-12-21 11:24:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:51,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:24:51,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:24:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:24:51,015 INFO L87 Difference]: Start difference. First operand 99024 states and 110692 transitions. Second operand has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:24:54,122 INFO L93 Difference]: Finished difference Result 225756 states and 251597 transitions. [2021-12-21 11:24:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:24:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 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 505 [2021-12-21 11:24:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:24:54,307 INFO L225 Difference]: With dead ends: 225756 [2021-12-21 11:24:54,307 INFO L226 Difference]: Without dead ends: 125459 [2021-12-21 11:24:54,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:24:54,377 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 779 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:24:54,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 230 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:24:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125459 states. [2021-12-21 11:24:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125459 to 120774. [2021-12-21 11:24:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120774 states, 120773 states have (on average 1.1128397903504923) internal successors, (134401), 120773 states have internal predecessors, (134401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120774 states to 120774 states and 134401 transitions. [2021-12-21 11:24:55,809 INFO L78 Accepts]: Start accepts. Automaton has 120774 states and 134401 transitions. Word has length 505 [2021-12-21 11:24:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:24:55,809 INFO L470 AbstractCegarLoop]: Abstraction has 120774 states and 134401 transitions. [2021-12-21 11:24:55,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:24:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 120774 states and 134401 transitions. [2021-12-21 11:24:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-21 11:24:55,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:24:55,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 11:24:55,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:24:55,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:24:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:24:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 912340516, now seen corresponding path program 1 times [2021-12-21 11:24:55,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:24:55,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069496268] [2021-12-21 11:24:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:24:55,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:24:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:24:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 509 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 11:24:56,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:24:56,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069496268] [2021-12-21 11:24:56,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069496268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:24:56,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:24:56,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:24:56,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118789700] [2021-12-21 11:24:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:24:56,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:24:56,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:24:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:24:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:24:56,197 INFO L87 Difference]: Start difference. First operand 120774 states and 134401 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)