./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccd6fbf35fbbc8efdb8c53f020fbab2bec7c750b8b37d40c2d70f15f5e9d8bef --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:08:16,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:08:16,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:08:16,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:08:16,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:08:16,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:08:16,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:08:16,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:08:16,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:08:16,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:08:16,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:08:16,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:08:16,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:08:16,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:08:16,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:08:16,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:08:16,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:08:16,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:08:16,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:08:16,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:08:16,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:08:16,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:08:16,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:08:16,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:08:16,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:08:16,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:08:16,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:08:16,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:08:16,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:08:16,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:08:16,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:08:16,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:08:16,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:08:16,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:08:16,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:08:16,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:08:16,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:08:16,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:08:16,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:08:16,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:08:16,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:08:16,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:08:16,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:08:16,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:08:16,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:08:16,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:08:16,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:08:16,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:08:16,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:08:16,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:08:16,470 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:08:16,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:08:16,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:08:16,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:08:16,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:08:16,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:08:16,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:08:16,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:08:16,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:08:16,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:08:16,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:08:16,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:08:16,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:08:16,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:08:16,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:08:16,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:08:16,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd6fbf35fbbc8efdb8c53f020fbab2bec7c750b8b37d40c2d70f15f5e9d8bef [2021-12-14 16:08:16,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:08:16,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:08:16,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:08:16,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:08:16,719 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:08:16,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:08:16,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a31e19ed/45d50e10d5ab40789fe4ca469864fa16/FLAG5b6530798 [2021-12-14 16:08:17,313 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:08:17,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:08:17,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a31e19ed/45d50e10d5ab40789fe4ca469864fa16/FLAG5b6530798 [2021-12-14 16:08:17,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a31e19ed/45d50e10d5ab40789fe4ca469864fa16 [2021-12-14 16:08:17,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:08:17,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:08:17,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:08:17,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:08:17,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:08:17,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:17" (1/1) ... [2021-12-14 16:08:17,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71582b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:17, skipping insertion in model container [2021-12-14 16:08:17,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:17" (1/1) ... [2021-12-14 16:08:17,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:08:17,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:08:17,899 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15547,15560] [2021-12-14 16:08:17,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c[22608,22621] [2021-12-14 16:08:18,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:08:18,451 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:08:18,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15547,15560] [2021-12-14 16:08:18,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c[22608,22621] [2021-12-14 16:08:18,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:08:18,806 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:08:18,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18 WrapperNode [2021-12-14 16:08:18,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:08:18,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:08:18,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:08:18,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:08:18,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:18,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,123 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5148 [2021-12-14 16:08:19,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:08:19,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:08:19,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:08:19,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:08:19,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:08:19,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:08:19,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:08:19,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:08:19,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (1/1) ... [2021-12-14 16:08:19,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:08:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:08:19,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:08:19,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:08:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:08:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:08:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:08:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:08:19,894 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:08:19,908 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:08:22,513 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:08:22,524 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:08:22,525 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:08:22,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:08:22 BoogieIcfgContainer [2021-12-14 16:08:22,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:08:22,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:08:22,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:08:22,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:08:22,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:08:17" (1/3) ... [2021-12-14 16:08:22,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9afadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:08:22, skipping insertion in model container [2021-12-14 16:08:22,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:18" (2/3) ... [2021-12-14 16:08:22,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9afadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:08:22, skipping insertion in model container [2021-12-14 16:08:22,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:08:22" (3/3) ... [2021-12-14 16:08:22,533 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-14 16:08:22,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:08:22,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:08:22,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:08:22,576 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:08:22,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:08:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 16:08:22,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:22,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:22,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash -321533933, now seen corresponding path program 1 times [2021-12-14 16:08:22,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:22,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564650948] [2021-12-14 16:08:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:22,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:22,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564650948] [2021-12-14 16:08:22,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564650948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:22,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:22,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:08:22,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937071369] [2021-12-14 16:08:22,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:08:22,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:08:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:08:22,746 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:22,853 INFO L93 Difference]: Finished difference Result 1808 states and 3422 transitions. [2021-12-14 16:08:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:08:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 16:08:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:22,868 INFO L225 Difference]: With dead ends: 1808 [2021-12-14 16:08:22,868 INFO L226 Difference]: Without dead ends: 862 [2021-12-14 16:08:22,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:08:22,875 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:22,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-14 16:08:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-14 16:08:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 861 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1623 transitions. [2021-12-14 16:08:22,943 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1623 transitions. Word has length 38 [2021-12-14 16:08:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1623 transitions. [2021-12-14 16:08:22,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1623 transitions. [2021-12-14 16:08:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 16:08:22,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:22,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:08:22,946 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-12-14 16:08:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358131983] [2021-12-14 16:08:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:22,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:23,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358131983] [2021-12-14 16:08:23,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358131983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:23,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:23,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:08:23,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159040656] [2021-12-14 16:08:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:08:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:23,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:08:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:08:23,087 INFO L87 Difference]: Start difference. First operand 862 states and 1623 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:23,159 INFO L93 Difference]: Finished difference Result 928 states and 1725 transitions. [2021-12-14 16:08:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:08:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 16:08:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:23,163 INFO L225 Difference]: With dead ends: 928 [2021-12-14 16:08:23,163 INFO L226 Difference]: Without dead ends: 862 [2021-12-14 16:08:23,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:08:23,165 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:23,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-14 16:08:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-14 16:08:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8406976744186045) internal successors, (1583), 861 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1583 transitions. [2021-12-14 16:08:23,180 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1583 transitions. Word has length 38 [2021-12-14 16:08:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:23,180 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1583 transitions. [2021-12-14 16:08:23,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1583 transitions. [2021-12-14 16:08:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 16:08:23,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:23,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:23,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:08:23,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1095136003, now seen corresponding path program 1 times [2021-12-14 16:08:23,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847910767] [2021-12-14 16:08:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:23,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:23,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:23,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847910767] [2021-12-14 16:08:23,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847910767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:23,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:23,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:23,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288376501] [2021-12-14 16:08:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:23,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:08:23,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:08:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:08:23,275 INFO L87 Difference]: Start difference. First operand 862 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:28,269 INFO L93 Difference]: Finished difference Result 3117 states and 5892 transitions. [2021-12-14 16:08:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:08:28,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 16:08:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:28,281 INFO L225 Difference]: With dead ends: 3117 [2021-12-14 16:08:28,281 INFO L226 Difference]: Without dead ends: 2364 [2021-12-14 16:08:28,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:08:28,291 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 2471 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:28,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2471 Valid, 837 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-14 16:08:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-12-14 16:08:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2021-12-14 16:08:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2362 states have (on average 1.5651989839119391) internal successors, (3697), 2363 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3697 transitions. [2021-12-14 16:08:28,358 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3697 transitions. Word has length 61 [2021-12-14 16:08:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:28,359 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 3697 transitions. [2021-12-14 16:08:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3697 transitions. [2021-12-14 16:08:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:28,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:28,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:28,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:08:28,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-12-14 16:08:28,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:28,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554006675] [2021-12-14 16:08:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:28,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:28,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554006675] [2021-12-14 16:08:28,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554006675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:28,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:28,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:28,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777629046] [2021-12-14 16:08:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:28,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,464 INFO L87 Difference]: Start difference. First operand 2364 states and 3697 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:28,497 INFO L93 Difference]: Finished difference Result 2482 states and 3883 transitions. [2021-12-14 16:08:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:28,506 INFO L225 Difference]: With dead ends: 2482 [2021-12-14 16:08:28,506 INFO L226 Difference]: Without dead ends: 2420 [2021-12-14 16:08:28,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,516 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-12-14 16:08:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2418. [2021-12-14 16:08:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2416 states have (on average 1.5658112582781456) internal successors, (3783), 2417 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3783 transitions. [2021-12-14 16:08:28,555 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3783 transitions. Word has length 77 [2021-12-14 16:08:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:28,555 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 3783 transitions. [2021-12-14 16:08:28,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3783 transitions. [2021-12-14 16:08:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:28,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:28,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:28,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:08:28,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-12-14 16:08:28,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:28,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346696234] [2021-12-14 16:08:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:28,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:28,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:28,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346696234] [2021-12-14 16:08:28,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346696234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:28,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:28,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:28,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663458834] [2021-12-14 16:08:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:28,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:28,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,653 INFO L87 Difference]: Start difference. First operand 2418 states and 3783 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:28,683 INFO L93 Difference]: Finished difference Result 2638 states and 4131 transitions. [2021-12-14 16:08:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:28,691 INFO L225 Difference]: With dead ends: 2638 [2021-12-14 16:08:28,691 INFO L226 Difference]: Without dead ends: 2522 [2021-12-14 16:08:28,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,693 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:28,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-12-14 16:08:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2021-12-14 16:08:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2518 states have (on average 1.5663224781572678) internal successors, (3944), 2519 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3944 transitions. [2021-12-14 16:08:28,737 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3944 transitions. Word has length 77 [2021-12-14 16:08:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 3944 transitions. [2021-12-14 16:08:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3944 transitions. [2021-12-14 16:08:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:28,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:28,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:28,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:08:28,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:28,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-12-14 16:08:28,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81406627] [2021-12-14 16:08:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:28,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:28,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:28,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81406627] [2021-12-14 16:08:28,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81406627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:28,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:28,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:28,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976050920] [2021-12-14 16:08:28,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:28,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:28,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,796 INFO L87 Difference]: Start difference. First operand 2520 states and 3944 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:28,870 INFO L93 Difference]: Finished difference Result 2932 states and 4594 transitions. [2021-12-14 16:08:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:28,878 INFO L225 Difference]: With dead ends: 2932 [2021-12-14 16:08:28,879 INFO L226 Difference]: Without dead ends: 2714 [2021-12-14 16:08:28,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,881 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-12-14 16:08:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2712. [2021-12-14 16:08:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2710 states have (on average 1.5660516605166053) internal successors, (4244), 2711 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4244 transitions. [2021-12-14 16:08:28,925 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4244 transitions. Word has length 77 [2021-12-14 16:08:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:28,925 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4244 transitions. [2021-12-14 16:08:28,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4244 transitions. [2021-12-14 16:08:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:28,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:28,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:08:28,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-12-14 16:08:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:28,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533809073] [2021-12-14 16:08:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:28,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533809073] [2021-12-14 16:08:28,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533809073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:28,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:28,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:28,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261036199] [2021-12-14 16:08:28,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:28,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:28,967 INFO L87 Difference]: Start difference. First operand 2712 states and 4244 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:28,998 INFO L93 Difference]: Finished difference Result 3484 states and 5454 transitions. [2021-12-14 16:08:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:29,007 INFO L225 Difference]: With dead ends: 3484 [2021-12-14 16:08:29,007 INFO L226 Difference]: Without dead ends: 3074 [2021-12-14 16:08:29,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:29,009 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:29,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-12-14 16:08:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3072. [2021-12-14 16:08:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3070 states have (on average 1.5635179153094463) internal successors, (4800), 3071 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4800 transitions. [2021-12-14 16:08:29,056 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4800 transitions. Word has length 77 [2021-12-14 16:08:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:29,056 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 4800 transitions. [2021-12-14 16:08:29,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4800 transitions. [2021-12-14 16:08:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:29,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:29,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:29,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:08:29,057 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-12-14 16:08:29,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:29,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667331072] [2021-12-14 16:08:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:29,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:29,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667331072] [2021-12-14 16:08:29,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667331072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:29,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:29,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:29,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918753543] [2021-12-14 16:08:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:29,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:29,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:29,091 INFO L87 Difference]: Start difference. First operand 3072 states and 4800 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:29,131 INFO L93 Difference]: Finished difference Result 4516 states and 7042 transitions. [2021-12-14 16:08:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:29,141 INFO L225 Difference]: With dead ends: 4516 [2021-12-14 16:08:29,141 INFO L226 Difference]: Without dead ends: 3746 [2021-12-14 16:08:29,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:29,143 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:29,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-12-14 16:08:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 3744. [2021-12-14 16:08:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3742 states have (on average 1.5563869588455372) internal successors, (5824), 3743 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5824 transitions. [2021-12-14 16:08:29,225 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5824 transitions. Word has length 77 [2021-12-14 16:08:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:29,226 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5824 transitions. [2021-12-14 16:08:29,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5824 transitions. [2021-12-14 16:08:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:08:29,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:29,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:29,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:08:29,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-12-14 16:08:29,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207126320] [2021-12-14 16:08:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:29,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:29,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:29,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207126320] [2021-12-14 16:08:29,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207126320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:29,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:29,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:29,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111521293] [2021-12-14 16:08:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:29,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:29,282 INFO L87 Difference]: Start difference. First operand 3744 states and 5824 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:29,831 INFO L93 Difference]: Finished difference Result 21048 states and 32524 transitions. [2021-12-14 16:08:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:08:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:08:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:29,884 INFO L225 Difference]: With dead ends: 21048 [2021-12-14 16:08:29,884 INFO L226 Difference]: Without dead ends: 19606 [2021-12-14 16:08:29,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:08:29,896 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:29,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19606 states. [2021-12-14 16:08:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19606 to 5184. [2021-12-14 16:08:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 5182 states have (on average 1.540717869548437) internal successors, (7984), 5183 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7984 transitions. [2021-12-14 16:08:30,136 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7984 transitions. Word has length 77 [2021-12-14 16:08:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:30,136 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 7984 transitions. [2021-12-14 16:08:30,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7984 transitions. [2021-12-14 16:08:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:08:30,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:30,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:30,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:08:30,138 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-12-14 16:08:30,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210515064] [2021-12-14 16:08:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:30,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:30,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210515064] [2021-12-14 16:08:30,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210515064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:30,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:30,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:30,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568592048] [2021-12-14 16:08:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:30,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:30,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:30,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:30,168 INFO L87 Difference]: Start difference. First operand 5184 states and 7984 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:30,390 INFO L93 Difference]: Finished difference Result 10596 states and 16146 transitions. [2021-12-14 16:08:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-14 16:08:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:30,404 INFO L225 Difference]: With dead ends: 10596 [2021-12-14 16:08:30,404 INFO L226 Difference]: Without dead ends: 7714 [2021-12-14 16:08:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:30,409 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:30,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-12-14 16:08:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7648. [2021-12-14 16:08:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.508762751765629) internal successors, (11536), 7647 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11536 transitions. [2021-12-14 16:08:30,656 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11536 transitions. Word has length 79 [2021-12-14 16:08:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:30,657 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11536 transitions. [2021-12-14 16:08:30,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11536 transitions. [2021-12-14 16:08:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:08:30,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:30,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:30,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:08:30,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-12-14 16:08:30,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960292388] [2021-12-14 16:08:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:30,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:30,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:30,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960292388] [2021-12-14 16:08:30,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960292388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:30,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:30,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:30,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677963654] [2021-12-14 16:08:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:30,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:30,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:30,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:30,822 INFO L87 Difference]: Start difference. First operand 7648 states and 11536 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:31,175 INFO L93 Difference]: Finished difference Result 12996 states and 19474 transitions. [2021-12-14 16:08:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-14 16:08:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:31,188 INFO L225 Difference]: With dead ends: 12996 [2021-12-14 16:08:31,189 INFO L226 Difference]: Without dead ends: 7650 [2021-12-14 16:08:31,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:08:31,197 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:31,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2051 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2021-12-14 16:08:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7648. [2021-12-14 16:08:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.5003923620193564) internal successors, (11472), 7647 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11472 transitions. [2021-12-14 16:08:31,453 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11472 transitions. Word has length 79 [2021-12-14 16:08:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:31,453 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11472 transitions. [2021-12-14 16:08:31,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11472 transitions. [2021-12-14 16:08:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 16:08:31,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:31,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:31,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:08:31,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-12-14 16:08:31,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:31,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170194066] [2021-12-14 16:08:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:31,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:31,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170194066] [2021-12-14 16:08:31,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170194066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:31,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:31,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:08:31,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834138946] [2021-12-14 16:08:31,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:31,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:08:31,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:08:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:08:31,504 INFO L87 Difference]: Start difference. First operand 7648 states and 11472 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:31,740 INFO L93 Difference]: Finished difference Result 12994 states and 19345 transitions. [2021-12-14 16:08:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:08:31,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-14 16:08:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:31,753 INFO L225 Difference]: With dead ends: 12994 [2021-12-14 16:08:31,754 INFO L226 Difference]: Without dead ends: 7648 [2021-12-14 16:08:31,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:08:31,762 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4648 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:31,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4648 Valid, 3055 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7648 states. [2021-12-14 16:08:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7648 to 7648. [2021-12-14 16:08:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.4920219722730839) internal successors, (11408), 7647 states have internal predecessors, (11408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11408 transitions. [2021-12-14 16:08:31,966 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11408 transitions. Word has length 80 [2021-12-14 16:08:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:31,967 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11408 transitions. [2021-12-14 16:08:31,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11408 transitions. [2021-12-14 16:08:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 16:08:31,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:31,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:31,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:08:31,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-12-14 16:08:31,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345410928] [2021-12-14 16:08:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:31,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:32,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345410928] [2021-12-14 16:08:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345410928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:32,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:32,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:08:32,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141977347] [2021-12-14 16:08:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:32,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:08:32,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:08:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:08:32,030 INFO L87 Difference]: Start difference. First operand 7648 states and 11408 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:32,356 INFO L93 Difference]: Finished difference Result 11618 states and 17115 transitions. [2021-12-14 16:08:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:08:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-14 16:08:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:32,376 INFO L225 Difference]: With dead ends: 11618 [2021-12-14 16:08:32,376 INFO L226 Difference]: Without dead ends: 11616 [2021-12-14 16:08:32,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:32,382 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 261 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 6379 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:32,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 6379 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11616 states. [2021-12-14 16:08:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11616 to 7840. [2021-12-14 16:08:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7838 states have (on average 1.475886705792294) internal successors, (11568), 7839 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 11568 transitions. [2021-12-14 16:08:32,651 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 11568 transitions. Word has length 80 [2021-12-14 16:08:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:32,651 INFO L470 AbstractCegarLoop]: Abstraction has 7840 states and 11568 transitions. [2021-12-14 16:08:32,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 11568 transitions. [2021-12-14 16:08:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 16:08:32,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:32,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:08:32,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:08:32,652 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-12-14 16:08:32,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:32,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8894786] [2021-12-14 16:08:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:32,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:32,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8894786] [2021-12-14 16:08:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8894786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:32,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326652580] [2021-12-14 16:08:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:32,687 INFO L87 Difference]: Start difference. First operand 7840 states and 11568 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:32,977 INFO L93 Difference]: Finished difference Result 13479 states and 19766 transitions. [2021-12-14 16:08:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:08:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-14 16:08:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:32,995 INFO L225 Difference]: With dead ends: 13479 [2021-12-14 16:08:32,995 INFO L226 Difference]: Without dead ends: 10404 [2021-12-14 16:08:33,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:33,003 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:33,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:08:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10404 states. [2021-12-14 16:08:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10404 to 10402. [2021-12-14 16:08:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10402 states, 10400 states have (on average 1.4601923076923078) internal successors, (15186), 10401 states have internal predecessors, (15186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10402 states to 10402 states and 15186 transitions. [2021-12-14 16:08:33,376 INFO L78 Accepts]: Start accepts. Automaton has 10402 states and 15186 transitions. Word has length 81 [2021-12-14 16:08:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:33,376 INFO L470 AbstractCegarLoop]: Abstraction has 10402 states and 15186 transitions. [2021-12-14 16:08:33,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10402 states and 15186 transitions. [2021-12-14 16:08:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:08:33,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:33,381 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:08:33,381 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-12-14 16:08:33,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:33,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856738852] [2021-12-14 16:08:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:33,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:08:33,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856738852] [2021-12-14 16:08:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856738852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:33,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:33,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:33,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39809206] [2021-12-14 16:08:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:33,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:33,447 INFO L87 Difference]: Start difference. First operand 10402 states and 15186 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:35,116 INFO L93 Difference]: Finished difference Result 60592 states and 86905 transitions. [2021-12-14 16:08:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:08:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:35,219 INFO L225 Difference]: With dead ends: 60592 [2021-12-14 16:08:35,220 INFO L226 Difference]: Without dead ends: 52494 [2021-12-14 16:08:35,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:08:35,240 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8638 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8638 SdHoareTripleChecker+Valid, 3816 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:35,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8638 Valid, 3816 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52494 states. [2021-12-14 16:08:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52494 to 18498. [2021-12-14 16:08:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18498 states, 18496 states have (on average 1.4421496539792387) internal successors, (26674), 18497 states have internal predecessors, (26674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 26674 transitions. [2021-12-14 16:08:36,139 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 26674 transitions. Word has length 112 [2021-12-14 16:08:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:36,140 INFO L470 AbstractCegarLoop]: Abstraction has 18498 states and 26674 transitions. [2021-12-14 16:08:36,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 26674 transitions. [2021-12-14 16:08:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:08:36,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:36,145 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:36,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:08:36,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-12-14 16:08:36,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:36,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301279389] [2021-12-14 16:08:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:36,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 16:08:36,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301279389] [2021-12-14 16:08:36,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301279389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:36,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:36,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:36,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631067479] [2021-12-14 16:08:36,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:36,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:36,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:36,207 INFO L87 Difference]: Start difference. First operand 18498 states and 26674 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:38,372 INFO L93 Difference]: Finished difference Result 68688 states and 98393 transitions. [2021-12-14 16:08:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:08:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:38,467 INFO L225 Difference]: With dead ends: 68688 [2021-12-14 16:08:38,467 INFO L226 Difference]: Without dead ends: 60590 [2021-12-14 16:08:38,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:08:38,578 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8455 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8455 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8455 Valid, 3903 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60590 states. [2021-12-14 16:08:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60590 to 30658. [2021-12-14 16:08:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30658 states, 30656 states have (on average 1.429605949895616) internal successors, (43826), 30657 states have internal predecessors, (43826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30658 states to 30658 states and 43826 transitions. [2021-12-14 16:08:39,995 INFO L78 Accepts]: Start accepts. Automaton has 30658 states and 43826 transitions. Word has length 112 [2021-12-14 16:08:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:39,995 INFO L470 AbstractCegarLoop]: Abstraction has 30658 states and 43826 transitions. [2021-12-14 16:08:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30658 states and 43826 transitions. [2021-12-14 16:08:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:08:40,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:40,001 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:08:40,002 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-12-14 16:08:40,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:40,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376668784] [2021-12-14 16:08:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:40,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 16:08:40,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376668784] [2021-12-14 16:08:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376668784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:40,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:40,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:40,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777800350] [2021-12-14 16:08:40,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:40,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:40,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:40,064 INFO L87 Difference]: Start difference. First operand 30658 states and 43826 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:42,998 INFO L93 Difference]: Finished difference Result 76784 states and 109881 transitions. [2021-12-14 16:08:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:08:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:43,107 INFO L225 Difference]: With dead ends: 76784 [2021-12-14 16:08:43,107 INFO L226 Difference]: Without dead ends: 68686 [2021-12-14 16:08:43,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:08:43,132 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68686 states. [2021-12-14 16:08:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68686 to 38754. [2021-12-14 16:08:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38754 states, 38752 states have (on average 1.427384393063584) internal successors, (55314), 38753 states have internal predecessors, (55314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38754 states to 38754 states and 55314 transitions. [2021-12-14 16:08:45,338 INFO L78 Accepts]: Start accepts. Automaton has 38754 states and 55314 transitions. Word has length 112 [2021-12-14 16:08:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 38754 states and 55314 transitions. [2021-12-14 16:08:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38754 states and 55314 transitions. [2021-12-14 16:08:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:08:45,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:45,346 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:45,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:08:45,346 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-12-14 16:08:45,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:45,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490233948] [2021-12-14 16:08:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:45,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:08:45,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490233948] [2021-12-14 16:08:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490233948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:45,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:45,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:45,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750937583] [2021-12-14 16:08:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:45,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:45,409 INFO L87 Difference]: Start difference. First operand 38754 states and 55314 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:48,806 INFO L93 Difference]: Finished difference Result 84880 states and 121369 transitions. [2021-12-14 16:08:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:08:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:48,909 INFO L225 Difference]: With dead ends: 84880 [2021-12-14 16:08:48,909 INFO L226 Difference]: Without dead ends: 76782 [2021-12-14 16:08:48,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:08:48,932 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8493 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8493 SdHoareTripleChecker+Valid, 3966 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8493 Valid, 3966 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76782 states. [2021-12-14 16:08:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76782 to 46850. [2021-12-14 16:08:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46850 states, 46848 states have (on average 1.4259306693989071) internal successors, (66802), 46849 states have internal predecessors, (66802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46850 states to 46850 states and 66802 transitions. [2021-12-14 16:08:51,478 INFO L78 Accepts]: Start accepts. Automaton has 46850 states and 66802 transitions. Word has length 112 [2021-12-14 16:08:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:51,478 INFO L470 AbstractCegarLoop]: Abstraction has 46850 states and 66802 transitions. [2021-12-14 16:08:51,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46850 states and 66802 transitions. [2021-12-14 16:08:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:08:51,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:51,486 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:51,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:08:51,486 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-12-14 16:08:51,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:51,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840627895] [2021-12-14 16:08:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:51,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 16:08:51,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840627895] [2021-12-14 16:08:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840627895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:51,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:51,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:08:51,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483845830] [2021-12-14 16:08:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:51,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:08:51,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:08:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:08:51,573 INFO L87 Difference]: Start difference. First operand 46850 states and 66802 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:08:55,747 INFO L93 Difference]: Finished difference Result 92976 states and 132857 transitions. [2021-12-14 16:08:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:08:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:08:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:08:55,860 INFO L225 Difference]: With dead ends: 92976 [2021-12-14 16:08:55,861 INFO L226 Difference]: Without dead ends: 84878 [2021-12-14 16:08:55,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:08:55,883 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8607 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8607 SdHoareTripleChecker+Valid, 3905 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:08:55,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8607 Valid, 3905 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:08:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84878 states. [2021-12-14 16:08:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84878 to 54946. [2021-12-14 16:08:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54946 states, 54944 states have (on average 1.424905358182877) internal successors, (78290), 54945 states have internal predecessors, (78290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54946 states to 54946 states and 78290 transitions. [2021-12-14 16:08:59,171 INFO L78 Accepts]: Start accepts. Automaton has 54946 states and 78290 transitions. Word has length 112 [2021-12-14 16:08:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:08:59,172 INFO L470 AbstractCegarLoop]: Abstraction has 54946 states and 78290 transitions. [2021-12-14 16:08:59,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:08:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 54946 states and 78290 transitions. [2021-12-14 16:08:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 16:08:59,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:08:59,182 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:08:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:08:59,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:08:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:08:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-12-14 16:08:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:08:59,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835090800] [2021-12-14 16:08:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:08:59,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:08:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:08:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:08:59,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:08:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835090800] [2021-12-14 16:08:59,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835090800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:08:59,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:08:59,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:08:59,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361013176] [2021-12-14 16:08:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:08:59,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:08:59,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:08:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:08:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:08:59,216 INFO L87 Difference]: Start difference. First operand 54946 states and 78290 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:01,121 INFO L93 Difference]: Finished difference Result 91592 states and 130748 transitions. [2021-12-14 16:09:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:01,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-14 16:09:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:01,174 INFO L225 Difference]: With dead ends: 91592 [2021-12-14 16:09:01,174 INFO L226 Difference]: Without dead ends: 38950 [2021-12-14 16:09:01,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:01,210 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:01,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38950 states. [2021-12-14 16:09:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38950 to 38948. [2021-12-14 16:09:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38948 states, 38946 states have (on average 1.4286704668001848) internal successors, (55641), 38947 states have internal predecessors, (55641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38948 states to 38948 states and 55641 transitions. [2021-12-14 16:09:03,584 INFO L78 Accepts]: Start accepts. Automaton has 38948 states and 55641 transitions. Word has length 114 [2021-12-14 16:09:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:03,584 INFO L470 AbstractCegarLoop]: Abstraction has 38948 states and 55641 transitions. [2021-12-14 16:09:03,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38948 states and 55641 transitions. [2021-12-14 16:09:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 16:09:03,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:03,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:03,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:09:03,591 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-12-14 16:09:03,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201944175] [2021-12-14 16:09:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:03,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:09:03,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201944175] [2021-12-14 16:09:03,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201944175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:03,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:03,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:03,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767475099] [2021-12-14 16:09:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:03,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:03,647 INFO L87 Difference]: Start difference. First operand 38948 states and 55641 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:07,057 INFO L93 Difference]: Finished difference Result 72754 states and 104032 transitions. [2021-12-14 16:09:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-14 16:09:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:07,145 INFO L225 Difference]: With dead ends: 72754 [2021-12-14 16:09:07,145 INFO L226 Difference]: Without dead ends: 67120 [2021-12-14 16:09:07,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:07,189 INFO L933 BasicCegarLoop]: 1667 mSDtfsCounter, 8581 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 3842 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:07,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 3842 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67120 states. [2021-12-14 16:09:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67120 to 44580. [2021-12-14 16:09:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44580 states, 44578 states have (on average 1.4276324644443448) internal successors, (63641), 44579 states have internal predecessors, (63641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44580 states to 44580 states and 63641 transitions. [2021-12-14 16:09:09,837 INFO L78 Accepts]: Start accepts. Automaton has 44580 states and 63641 transitions. Word has length 114 [2021-12-14 16:09:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:09,838 INFO L470 AbstractCegarLoop]: Abstraction has 44580 states and 63641 transitions. [2021-12-14 16:09:09,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 44580 states and 63641 transitions. [2021-12-14 16:09:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 16:09:09,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:09,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:09:09,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1184656150, now seen corresponding path program 1 times [2021-12-14 16:09:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:09,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871458928] [2021-12-14 16:09:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:09,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:10,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:10,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871458928] [2021-12-14 16:09:10,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871458928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:09:10,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328782423] [2021-12-14 16:09:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:10,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:09:10,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:09:10,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:09:10,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:09:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:09:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:09:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:09:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:09:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:09:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328782423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:09:10,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:09:10,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-14 16:09:10,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427224639] [2021-12-14 16:09:10,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:09:10,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:09:10,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:09:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:09:10,777 INFO L87 Difference]: Start difference. First operand 44580 states and 63641 transitions. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)