./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label51.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 c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:08:34,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:08:34,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:08:34,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:08:34,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:08:34,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:08:34,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:08:34,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:08:34,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:08:34,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:08:34,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:08:34,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:08:34,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:08:34,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:08:34,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:08:34,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:08:34,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:08:34,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:08:34,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:08:34,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:08:34,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:08:34,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:08:34,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:08:34,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:08:34,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:08:34,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:08:34,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:08:34,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:08:34,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:08:34,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:08:34,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:08:34,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:08:34,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:08:34,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:08:34,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:08:34,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:08:34,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:08:34,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:08:34,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:08:34,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:08:34,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:08:34,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:08:34,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:08:34,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:08:34,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:08:34,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:08:34,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:08:34,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:08:34,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:08:34,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:08:34,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:08:34,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:08:34,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:08:34,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:08:34,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:08:34,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:08:34,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:08:34,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:08:34,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:08:34,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:08:34,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:08:34,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 [2021-12-21 11:08:34,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:08:34,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:08:34,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:08:34,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:08:34,743 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:08:34,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-12-21 11:08:34,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9e1237/08d74cc31aa24a28b844af78ccd59a38/FLAG9fdaf2a3c [2021-12-21 11:08:35,338 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:08:35,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-12-21 11:08:35,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9e1237/08d74cc31aa24a28b844af78ccd59a38/FLAG9fdaf2a3c [2021-12-21 11:08:35,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd9e1237/08d74cc31aa24a28b844af78ccd59a38 [2021-12-21 11:08:35,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:08:35,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:08:35,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:08:35,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:08:35,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:08:35,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:08:35" (1/1) ... [2021-12-21 11:08:35,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4396618e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:35, skipping insertion in model container [2021-12-21 11:08:35,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:08:35" (1/1) ... [2021-12-21 11:08:35,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:08:35,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:08:35,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-12-21 11:08:36,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:08:36,538 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:08:36,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-12-21 11:08:36,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:08:36,921 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:08:36,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36 WrapperNode [2021-12-21 11:08:36,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:08:36,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:08:36,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:08:36,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:08:36,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:36,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:37,637 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-21 11:08:37,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:08:37,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:08:37,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:08:37,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:08:37,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:37,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:37,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:37,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:38,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:38,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:38,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:38,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:08:38,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:08:38,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:08:38,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:08:38,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (1/1) ... [2021-12-21 11:08:38,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:08:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:08:38,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:08:38,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:08:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:08:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:08:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:08:38,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:08:38,383 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:08:38,384 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:08:42,003 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:08:42,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:08:42,013 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:08:42,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:08:42 BoogieIcfgContainer [2021-12-21 11:08:42,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:08:42,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:08:42,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:08:42,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:08:42,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:08:35" (1/3) ... [2021-12-21 11:08:42,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89d6b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:08:42, skipping insertion in model container [2021-12-21 11:08:42,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:08:36" (2/3) ... [2021-12-21 11:08:42,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89d6b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:08:42, skipping insertion in model container [2021-12-21 11:08:42,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:08:42" (3/3) ... [2021-12-21 11:08:42,021 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label51.c [2021-12-21 11:08:42,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:08:42,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:08:42,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:08:42,061 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:08:42,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:08:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:08:42,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:42,089 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] [2021-12-21 11:08:42,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-21 11:08:42,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024341051] [2021-12-21 11:08:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:42,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:42,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024341051] [2021-12-21 11:08:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024341051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:42,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:42,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:42,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055305576] [2021-12-21 11:08:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:42,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:42,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:42,269 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:45,806 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-21 11:08:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:45,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-21 11:08:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:45,830 INFO L225 Difference]: With dead ends: 3147 [2021-12-21 11:08:45,843 INFO L226 Difference]: Without dead ends: 1964 [2021-12-21 11:08:45,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:45,852 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1155 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:45,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-21 11:08:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-21 11:08:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-21 11:08:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-21 11:08:45,957 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 24 [2021-12-21 11:08:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:45,957 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-21 11:08:45,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-21 11:08:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 11:08:45,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:45,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:45,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:08:45,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970155, now seen corresponding path program 1 times [2021-12-21 11:08:45,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10628444] [2021-12-21 11:08:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:45,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:46,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:46,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10628444] [2021-12-21 11:08:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10628444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:46,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:46,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:46,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677788367] [2021-12-21 11:08:46,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:46,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:46,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:46,074 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:49,316 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-12-21 11:08:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-21 11:08:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:49,328 INFO L225 Difference]: With dead ends: 5542 [2021-12-21 11:08:49,328 INFO L226 Difference]: Without dead ends: 3593 [2021-12-21 11:08:49,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:49,332 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:49,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:08:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-21 11:08:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-12-21 11:08:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-21 11:08:49,388 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 95 [2021-12-21 11:08:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:49,388 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-21 11:08:49,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-21 11:08:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 11:08:49,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:49,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:49,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:08:49,392 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash 19544424, now seen corresponding path program 1 times [2021-12-21 11:08:49,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:49,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328500945] [2021-12-21 11:08:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:49,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:49,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328500945] [2021-12-21 11:08:49,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328500945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:49,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687398701] [2021-12-21 11:08:49,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:49,477 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:52,541 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-21 11:08:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-21 11:08:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:52,562 INFO L225 Difference]: With dead ends: 10352 [2021-12-21 11:08:52,562 INFO L226 Difference]: Without dead ends: 6773 [2021-12-21 11:08:52,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:52,572 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:52,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 11:08:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-21 11:08:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-21 11:08:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-12-21 11:08:52,668 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 109 [2021-12-21 11:08:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:52,670 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-12-21 11:08:52,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-12-21 11:08:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-21 11:08:52,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:52,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:52,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:08:52,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1515792606, now seen corresponding path program 1 times [2021-12-21 11:08:52,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:52,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606507291] [2021-12-21 11:08:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:52,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:52,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:52,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606507291] [2021-12-21 11:08:52,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606507291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:52,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:52,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:52,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405561822] [2021-12-21 11:08:52,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:52,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:52,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:52,808 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:55,772 INFO L93 Difference]: Finished difference Result 19804 states and 26220 transitions. [2021-12-21 11:08:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-12-21 11:08:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:55,807 INFO L225 Difference]: With dead ends: 19804 [2021-12-21 11:08:55,807 INFO L226 Difference]: Without dead ends: 13057 [2021-12-21 11:08:55,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:55,818 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:55,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:08:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-12-21 11:08:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-12-21 11:08:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.217914336066202) internal successors, (15895), 13051 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15895 transitions. [2021-12-21 11:08:56,002 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15895 transitions. Word has length 138 [2021-12-21 11:08:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15895 transitions. [2021-12-21 11:08:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15895 transitions. [2021-12-21 11:08:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 11:08:56,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:56,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:08:56,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1481177967, now seen corresponding path program 1 times [2021-12-21 11:08:56,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721174858] [2021-12-21 11:08:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:56,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 11:08:56,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721174858] [2021-12-21 11:08:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721174858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:56,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:56,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:56,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455717565] [2021-12-21 11:08:56,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:56,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:56,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:56,143 INFO L87 Difference]: Start difference. First operand 13052 states and 15895 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:58,837 INFO L93 Difference]: Finished difference Result 26889 states and 32590 transitions. [2021-12-21 11:08:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:58,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-12-21 11:08:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:58,864 INFO L225 Difference]: With dead ends: 26889 [2021-12-21 11:08:58,864 INFO L226 Difference]: Without dead ends: 13839 [2021-12-21 11:08:58,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:58,875 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:08:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-12-21 11:08:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13839. [2021-12-21 11:08:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 1.2058823529411764) internal successors, (16687), 13838 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 16687 transitions. [2021-12-21 11:08:59,026 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 16687 transitions. Word has length 216 [2021-12-21 11:08:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:59,027 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 16687 transitions. [2021-12-21 11:08:59,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 16687 transitions. [2021-12-21 11:08:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-21 11:08:59,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:59,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:59,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:08:59,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1840123782, now seen corresponding path program 1 times [2021-12-21 11:08:59,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987439155] [2021-12-21 11:08:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:59,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:59,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987439155] [2021-12-21 11:08:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987439155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:59,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:59,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888304707] [2021-12-21 11:08:59,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:59,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:59,140 INFO L87 Difference]: Start difference. First operand 13839 states and 16687 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:02,291 INFO L93 Difference]: Finished difference Result 33200 states and 41058 transitions. [2021-12-21 11:09:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:02,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-12-21 11:09:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:02,322 INFO L225 Difference]: With dead ends: 33200 [2021-12-21 11:09:02,323 INFO L226 Difference]: Without dead ends: 20150 [2021-12-21 11:09:02,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:02,338 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 861 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:02,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 943 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 11:09:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20150 states. [2021-12-21 11:09:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20150 to 20140. [2021-12-21 11:09:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20140 states, 20139 states have (on average 1.1898803316947217) internal successors, (23963), 20139 states have internal predecessors, (23963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20140 states to 20140 states and 23963 transitions. [2021-12-21 11:09:02,551 INFO L78 Accepts]: Start accepts. Automaton has 20140 states and 23963 transitions. Word has length 223 [2021-12-21 11:09:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:02,552 INFO L470 AbstractCegarLoop]: Abstraction has 20140 states and 23963 transitions. [2021-12-21 11:09:02,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20140 states and 23963 transitions. [2021-12-21 11:09:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-21 11:09:02,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:02,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:09:02,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -175401069, now seen corresponding path program 1 times [2021-12-21 11:09:02,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836752835] [2021-12-21 11:09:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:02,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:09:02,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836752835] [2021-12-21 11:09:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836752835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:02,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:02,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:02,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280947962] [2021-12-21 11:09:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:02,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:02,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:02,707 INFO L87 Difference]: Start difference. First operand 20140 states and 23963 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:05,086 INFO L93 Difference]: Finished difference Result 39361 states and 46953 transitions. [2021-12-21 11:09:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 238 [2021-12-21 11:09:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:05,160 INFO L225 Difference]: With dead ends: 39361 [2021-12-21 11:09:05,160 INFO L226 Difference]: Without dead ends: 20010 [2021-12-21 11:09:05,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:05,179 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 1037 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:05,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1642 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:09:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2021-12-21 11:09:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19220. [2021-12-21 11:09:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19220 states, 19219 states have (on average 1.1321608824600655) internal successors, (21759), 19219 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19220 states to 19220 states and 21759 transitions. [2021-12-21 11:09:05,341 INFO L78 Accepts]: Start accepts. Automaton has 19220 states and 21759 transitions. Word has length 238 [2021-12-21 11:09:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:05,342 INFO L470 AbstractCegarLoop]: Abstraction has 19220 states and 21759 transitions. [2021-12-21 11:09:05,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19220 states and 21759 transitions. [2021-12-21 11:09:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-21 11:09:05,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:05,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:05,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:09:05,346 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -523861264, now seen corresponding path program 1 times [2021-12-21 11:09:05,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952628037] [2021-12-21 11:09:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:05,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:09:05,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952628037] [2021-12-21 11:09:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952628037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:05,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:05,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865880102] [2021-12-21 11:09:05,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:05,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:05,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:05,498 INFO L87 Difference]: Start difference. First operand 19220 states and 21759 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:08,552 INFO L93 Difference]: Finished difference Result 43955 states and 50452 transitions. [2021-12-21 11:09:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 312 [2021-12-21 11:09:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:08,586 INFO L225 Difference]: With dead ends: 43955 [2021-12-21 11:09:08,587 INFO L226 Difference]: Without dead ends: 25524 [2021-12-21 11:09:08,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:08,603 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 844 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:08,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1919 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:09:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25524 states. [2021-12-21 11:09:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25524 to 24733. [2021-12-21 11:09:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24733 states, 24732 states have (on average 1.118591298722303) internal successors, (27665), 24732 states have internal predecessors, (27665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24733 states to 24733 states and 27665 transitions. [2021-12-21 11:09:08,835 INFO L78 Accepts]: Start accepts. Automaton has 24733 states and 27665 transitions. Word has length 312 [2021-12-21 11:09:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:08,835 INFO L470 AbstractCegarLoop]: Abstraction has 24733 states and 27665 transitions. [2021-12-21 11:09:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24733 states and 27665 transitions. [2021-12-21 11:09:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-21 11:09:08,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:08,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:08,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:09:08,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1968174890, now seen corresponding path program 1 times [2021-12-21 11:09:08,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416411706] [2021-12-21 11:09:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:08,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 11:09:09,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:09,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416411706] [2021-12-21 11:09:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416411706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:09,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072848430] [2021-12-21 11:09:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:09:09,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:09:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:09:09,019 INFO L87 Difference]: Start difference. First operand 24733 states and 27665 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:15,167 INFO L93 Difference]: Finished difference Result 91374 states and 102286 transitions. [2021-12-21 11:09:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:09:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-21 11:09:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:15,255 INFO L225 Difference]: With dead ends: 91374 [2021-12-21 11:09:15,255 INFO L226 Difference]: Without dead ends: 67430 [2021-12-21 11:09:15,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:09:15,290 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1715 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 5999 mSolverCounterSat, 1099 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1715 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 7098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1099 IncrementalHoareTripleChecker+Valid, 5999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:15,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1715 Valid, 764 Invalid, 7098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1099 Valid, 5999 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-21 11:09:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67430 states. [2021-12-21 11:09:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67430 to 64161. [2021-12-21 11:09:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64161 states, 64160 states have (on average 1.1056577306733166) internal successors, (70939), 64160 states have internal predecessors, (70939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64161 states to 64161 states and 70939 transitions. [2021-12-21 11:09:15,981 INFO L78 Accepts]: Start accepts. Automaton has 64161 states and 70939 transitions. Word has length 321 [2021-12-21 11:09:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:15,981 INFO L470 AbstractCegarLoop]: Abstraction has 64161 states and 70939 transitions. [2021-12-21 11:09:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64161 states and 70939 transitions. [2021-12-21 11:09:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-21 11:09:15,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:15,987 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:09:15,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash -752409273, now seen corresponding path program 1 times [2021-12-21 11:09:15,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042839475] [2021-12-21 11:09:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:15,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-21 11:09:16,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042839475] [2021-12-21 11:09:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042839475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:16,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:16,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:09:16,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635456646] [2021-12-21 11:09:16,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:16,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:16,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:16,081 INFO L87 Difference]: Start difference. First operand 64161 states and 70939 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:19,123 INFO L93 Difference]: Finished difference Result 140934 states and 155366 transitions. [2021-12-21 11:09:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2021-12-21 11:09:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:19,208 INFO L225 Difference]: With dead ends: 140934 [2021-12-21 11:09:19,208 INFO L226 Difference]: Without dead ends: 76775 [2021-12-21 11:09:19,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:19,238 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 728 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:19,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1175 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:09:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76775 states. [2021-12-21 11:09:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76775 to 75190. [2021-12-21 11:09:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75190 states, 75189 states have (on average 1.0959847850084454) internal successors, (82406), 75189 states have internal predecessors, (82406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75190 states to 75190 states and 82406 transitions. [2021-12-21 11:09:19,932 INFO L78 Accepts]: Start accepts. Automaton has 75190 states and 82406 transitions. Word has length 350 [2021-12-21 11:09:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:19,933 INFO L470 AbstractCegarLoop]: Abstraction has 75190 states and 82406 transitions. [2021-12-21 11:09:19,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 75190 states and 82406 transitions. [2021-12-21 11:09:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-21 11:09:19,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:19,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:19,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:09:19,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1408305103, now seen corresponding path program 1 times [2021-12-21 11:09:19,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084019252] [2021-12-21 11:09:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:19,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 266 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 11:09:20,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:20,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084019252] [2021-12-21 11:09:20,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084019252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:09:20,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812800848] [2021-12-21 11:09:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:20,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:09:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:09:20,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:09:20,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:09:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:09:20,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:09:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-21 11:09:21,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:09:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812800848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:21,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:09:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:09:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372504664] [2021-12-21 11:09:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:21,343 INFO L87 Difference]: Start difference. First operand 75190 states and 82406 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:24,420 INFO L93 Difference]: Finished difference Result 151934 states and 166950 transitions. [2021-12-21 11:09:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 379 [2021-12-21 11:09:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:24,531 INFO L225 Difference]: With dead ends: 151934 [2021-12-21 11:09:24,532 INFO L226 Difference]: Without dead ends: 88562 [2021-12-21 11:09:24,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:24,576 INFO L933 BasicCegarLoop]: 1739 mSDtfsCounter, 872 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:24,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1868 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:09:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88562 states. [2021-12-21 11:09:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88562 to 79901. [2021-12-21 11:09:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79901 states, 79900 states have (on average 1.0907259073842304) internal successors, (87149), 79900 states have internal predecessors, (87149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79901 states to 79901 states and 87149 transitions. [2021-12-21 11:09:25,668 INFO L78 Accepts]: Start accepts. Automaton has 79901 states and 87149 transitions. Word has length 379 [2021-12-21 11:09:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 79901 states and 87149 transitions. [2021-12-21 11:09:25,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 79901 states and 87149 transitions. [2021-12-21 11:09:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-21 11:09:25,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:25,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:25,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:09:25,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 11:09:25,893 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1885680466, now seen corresponding path program 1 times [2021-12-21 11:09:25,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:25,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233822934] [2021-12-21 11:09:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:25,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 281 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 11:09:26,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:26,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233822934] [2021-12-21 11:09:26,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233822934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:09:26,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094554718] [2021-12-21 11:09:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:26,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:09:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:09:26,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:09:26,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:09:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:09:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:09:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-21 11:09:26,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:09:26,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094554718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:26,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:09:26,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 11:09:26,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497020830] [2021-12-21 11:09:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:26,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:26,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:26,978 INFO L87 Difference]: Start difference. First operand 79901 states and 87149 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:29,797 INFO L93 Difference]: Finished difference Result 158209 states and 174493 transitions. [2021-12-21 11:09:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 454 [2021-12-21 11:09:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:29,906 INFO L225 Difference]: With dead ends: 158209 [2021-12-21 11:09:29,906 INFO L226 Difference]: Without dead ends: 90126 [2021-12-21 11:09:29,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:09:29,938 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 1134 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:29,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 400 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:09:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90126 states. [2021-12-21 11:09:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90126 to 90126. [2021-12-21 11:09:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90126 states, 90125 states have (on average 1.094868238557559) internal successors, (98675), 90125 states have internal predecessors, (98675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90126 states to 90126 states and 98675 transitions. [2021-12-21 11:09:30,860 INFO L78 Accepts]: Start accepts. Automaton has 90126 states and 98675 transitions. Word has length 454 [2021-12-21 11:09:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:30,861 INFO L470 AbstractCegarLoop]: Abstraction has 90126 states and 98675 transitions. [2021-12-21 11:09:30,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 90126 states and 98675 transitions. [2021-12-21 11:09:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-21 11:09:30,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:30,869 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:30,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:09:31,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 11:09:31,089 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -32966867, now seen corresponding path program 1 times [2021-12-21 11:09:31,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:31,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061752597] [2021-12-21 11:09:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:31,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-21 11:09:31,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061752597] [2021-12-21 11:09:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061752597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:31,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:31,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210620773] [2021-12-21 11:09:31,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:31,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:31,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:31,398 INFO L87 Difference]: Start difference. First operand 90126 states and 98675 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:34,906 INFO L93 Difference]: Finished difference Result 199926 states and 220123 transitions. [2021-12-21 11:09:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 468 [2021-12-21 11:09:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:35,106 INFO L225 Difference]: With dead ends: 199926 [2021-12-21 11:09:35,107 INFO L226 Difference]: Without dead ends: 110589 [2021-12-21 11:09:35,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:35,149 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 799 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:35,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 880 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:09:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110589 states. [2021-12-21 11:09:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110589 to 108212. [2021-12-21 11:09:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108212 states, 108211 states have (on average 1.092301152378224) internal successors, (118199), 108211 states have internal predecessors, (118199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108212 states to 108212 states and 118199 transitions. [2021-12-21 11:09:36,673 INFO L78 Accepts]: Start accepts. Automaton has 108212 states and 118199 transitions. Word has length 468 [2021-12-21 11:09:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:09:36,673 INFO L470 AbstractCegarLoop]: Abstraction has 108212 states and 118199 transitions. [2021-12-21 11:09:36,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 108212 states and 118199 transitions. [2021-12-21 11:09:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-12-21 11:09:36,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:09:36,682 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:09:36,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:09:36,682 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:09:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:09:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1893972176, now seen corresponding path program 1 times [2021-12-21 11:09:36,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:09:36,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335226797] [2021-12-21 11:09:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:09:36,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:09:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:09:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:09:36,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:09:36,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335226797] [2021-12-21 11:09:36,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335226797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:09:36,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:09:36,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:09:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883548233] [2021-12-21 11:09:36,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:09:36,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:09:36,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:09:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:09:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:36,820 INFO L87 Difference]: Start difference. First operand 108212 states and 118199 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:09:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:09:40,508 INFO L93 Difference]: Finished difference Result 217993 states and 237980 transitions. [2021-12-21 11:09:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:09:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 472 [2021-12-21 11:09:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:09:40,668 INFO L225 Difference]: With dead ends: 217993 [2021-12-21 11:09:40,668 INFO L226 Difference]: Without dead ends: 108207 [2021-12-21 11:09:40,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:09:40,724 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 734 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:09:40,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1807 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:09:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108207 states.