./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:55:09,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:55:09,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:55:09,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:55:09,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:55:09,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:55:09,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:55:09,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:55:09,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:55:09,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:55:09,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:55:09,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:55:09,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:55:09,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:55:09,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:55:09,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:55:09,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:55:09,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:55:09,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:55:09,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:55:09,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:55:09,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:55:09,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:55:09,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:55:09,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:55:09,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:55:09,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:55:09,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:55:09,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:55:09,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:55:09,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:55:09,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:55:09,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:55:09,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:55:09,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:55:09,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:55:09,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:55:09,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:55:09,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:55:09,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:55:09,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:55:09,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:55:09,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:55:09,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:55:09,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:55:09,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:55:09,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:55:09,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:55:09,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:55:09,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:55:09,755 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:55:09,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:55:09,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:55:09,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:55:09,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:55:09,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:55:09,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:55:09,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:55:09,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:55:09,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:55:09,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:55:09,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:55:09,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:55:09,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:55:09,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 [2021-12-21 13:55:09,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:55:09,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:55:09,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:55:09,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:55:09,945 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:55:09,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:55:09,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20d89653/f7ccd2b7e2ab4391acc02d2ecabcd0ed/FLAG415189f59 [2021-12-21 13:55:10,364 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:55:10,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:55:10,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20d89653/f7ccd2b7e2ab4391acc02d2ecabcd0ed/FLAG415189f59 [2021-12-21 13:55:10,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20d89653/f7ccd2b7e2ab4391acc02d2ecabcd0ed [2021-12-21 13:55:10,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:55:10,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:55:10,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:55:10,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:55:10,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:55:10,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:55:10" (1/1) ... [2021-12-21 13:55:10,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5ab13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:10, skipping insertion in model container [2021-12-21 13:55:10,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:55:10" (1/1) ... [2021-12-21 13:55:10,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:55:10,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:55:11,057 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/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-12-21 13:55:11,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:55:11,110 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:55:11,178 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/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-12-21 13:55:11,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:55:11,243 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:55:11,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11 WrapperNode [2021-12-21 13:55:11,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:55:11,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:55:11,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:55:11,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:55:11,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,336 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2021-12-21 13:55:11,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:55:11,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:55:11,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:55:11,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:55:11,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:55:11,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:55:11,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:55:11,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:55:11,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (1/1) ... [2021-12-21 13:55:11,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:55:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:55:11,465 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 13:55:11,496 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 13:55:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:55:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:55:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:55:11,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:55:11,662 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:55:11,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:55:12,317 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:55:12,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:55:12,326 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:55:12,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:55:12 BoogieIcfgContainer [2021-12-21 13:55:12,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:55:12,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:55:12,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:55:12,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:55:12,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:55:10" (1/3) ... [2021-12-21 13:55:12,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565cbf5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:55:12, skipping insertion in model container [2021-12-21 13:55:12,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:55:11" (2/3) ... [2021-12-21 13:55:12,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565cbf5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:55:12, skipping insertion in model container [2021-12-21 13:55:12,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:55:12" (3/3) ... [2021-12-21 13:55:12,335 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:55:12,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:55:12,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:55:12,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:55:12,388 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 13:55:12,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:55:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 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 13:55:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-21 13:55:12,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:12,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:12,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2021-12-21 13:55:12,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76862883] [2021-12-21 13:55:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:12,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:12,798 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 13:55:12,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76862883] [2021-12-21 13:55:12,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76862883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:12,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:12,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:12,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456934640] [2021-12-21 13:55:12,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:12,827 INFO L87 Difference]: Start difference. First operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 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 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 13:55:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:12,921 INFO L93 Difference]: Finished difference Result 702 states and 1220 transitions. [2021-12-21 13:55:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-12-21 13:55:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:12,934 INFO L225 Difference]: With dead ends: 702 [2021-12-21 13:55:12,934 INFO L226 Difference]: Without dead ends: 565 [2021-12-21 13:55:12,937 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 13:55:12,940 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 418 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:12,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1007 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-21 13:55:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-12-21 13:55:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.498220640569395) internal successors, (842), 562 states have internal predecessors, (842), 0 states have call successors, (0), 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 13:55:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 842 transitions. [2021-12-21 13:55:12,993 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 842 transitions. Word has length 155 [2021-12-21 13:55:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:12,994 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 842 transitions. [2021-12-21 13:55:12,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 13:55:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 842 transitions. [2021-12-21 13:55:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-21 13:55:13,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:13,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:13,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:55:13,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -599043347, now seen corresponding path program 1 times [2021-12-21 13:55:13,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:13,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973979631] [2021-12-21 13:55:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:13,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:13,170 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 13:55:13,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973979631] [2021-12-21 13:55:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973979631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:13,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:13,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:13,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183374840] [2021-12-21 13:55:13,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:13,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:13,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:13,173 INFO L87 Difference]: Start difference. First operand 563 states and 842 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 13:55:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:13,265 INFO L93 Difference]: Finished difference Result 1643 states and 2449 transitions. [2021-12-21 13:55:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-12-21 13:55:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:13,270 INFO L225 Difference]: With dead ends: 1643 [2021-12-21 13:55:13,270 INFO L226 Difference]: Without dead ends: 1089 [2021-12-21 13:55:13,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:13,273 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1089 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:13,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 1238 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-21 13:55:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2021-12-21 13:55:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 1.4806629834254144) internal successors, (1608), 1086 states have internal predecessors, (1608), 0 states have call successors, (0), 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 13:55:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1608 transitions. [2021-12-21 13:55:13,379 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1608 transitions. Word has length 155 [2021-12-21 13:55:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:13,382 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1608 transitions. [2021-12-21 13:55:13,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 13:55:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1608 transitions. [2021-12-21 13:55:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 13:55:13,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:13,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:13,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:55:13,392 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1611010681, now seen corresponding path program 1 times [2021-12-21 13:55:13,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711903539] [2021-12-21 13:55:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:13,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:13,474 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 13:55:13,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711903539] [2021-12-21 13:55:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711903539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:13,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:13,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:13,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777605269] [2021-12-21 13:55:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:13,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:13,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:13,479 INFO L87 Difference]: Start difference. First operand 1087 states and 1608 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 13:55:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:13,583 INFO L93 Difference]: Finished difference Result 3223 states and 4762 transitions. [2021-12-21 13:55:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:13,584 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 156 [2021-12-21 13:55:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:13,608 INFO L225 Difference]: With dead ends: 3223 [2021-12-21 13:55:13,608 INFO L226 Difference]: Without dead ends: 2164 [2021-12-21 13:55:13,610 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 13:55:13,611 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 492 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:13,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1193 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-12-21 13:55:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1089. [2021-12-21 13:55:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.4797794117647058) internal successors, (1610), 1088 states have internal predecessors, (1610), 0 states have call successors, (0), 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 13:55:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1610 transitions. [2021-12-21 13:55:13,732 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1610 transitions. Word has length 156 [2021-12-21 13:55:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1610 transitions. [2021-12-21 13:55:13,733 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 13:55:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1610 transitions. [2021-12-21 13:55:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-21 13:55:13,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:13,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:13,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:55:13,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash -580833396, now seen corresponding path program 1 times [2021-12-21 13:55:13,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:13,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276748504] [2021-12-21 13:55:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:13,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:13,920 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 13:55:13,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276748504] [2021-12-21 13:55:13,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276748504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:13,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:13,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:13,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132296351] [2021-12-21 13:55:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:13,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:13,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:13,923 INFO L87 Difference]: Start difference. First operand 1089 states and 1610 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 13:55:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:14,136 INFO L93 Difference]: Finished difference Result 3149 states and 4634 transitions. [2021-12-21 13:55:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-12-21 13:55:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:14,143 INFO L225 Difference]: With dead ends: 3149 [2021-12-21 13:55:14,144 INFO L226 Difference]: Without dead ends: 2090 [2021-12-21 13:55:14,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:14,146 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1043 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:14,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 1249 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-12-21 13:55:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2021-12-21 13:55:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 1.460469573550551) internal successors, (3048), 2087 states have internal predecessors, (3048), 0 states have call successors, (0), 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 13:55:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3048 transitions. [2021-12-21 13:55:14,299 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3048 transitions. Word has length 157 [2021-12-21 13:55:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3048 transitions. [2021-12-21 13:55:14,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 13:55:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3048 transitions. [2021-12-21 13:55:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-21 13:55:14,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:14,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:14,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:55:14,304 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash 268848056, now seen corresponding path program 1 times [2021-12-21 13:55:14,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:14,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205975581] [2021-12-21 13:55:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:14,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:14,368 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 13:55:14,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205975581] [2021-12-21 13:55:14,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205975581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:14,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:14,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922851483] [2021-12-21 13:55:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:14,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:14,371 INFO L87 Difference]: Start difference. First operand 2088 states and 3048 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:14,657 INFO L93 Difference]: Finished difference Result 6188 states and 9024 transitions. [2021-12-21 13:55:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-12-21 13:55:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:14,671 INFO L225 Difference]: With dead ends: 6188 [2021-12-21 13:55:14,671 INFO L226 Difference]: Without dead ends: 4144 [2021-12-21 13:55:14,674 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 13:55:14,675 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 478 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:14,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 1472 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-12-21 13:55:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2092. [2021-12-21 13:55:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 1.459588713534194) internal successors, (3052), 2091 states have internal predecessors, (3052), 0 states have call successors, (0), 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 13:55:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3052 transitions. [2021-12-21 13:55:14,831 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3052 transitions. Word has length 158 [2021-12-21 13:55:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:14,831 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3052 transitions. [2021-12-21 13:55:14,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3052 transitions. [2021-12-21 13:55:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 13:55:14,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:14,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:14,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:55:14,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1767168465, now seen corresponding path program 1 times [2021-12-21 13:55:14,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:14,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887646839] [2021-12-21 13:55:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:14,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:14,873 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 13:55:14,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887646839] [2021-12-21 13:55:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887646839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:14,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:14,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:14,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684228307] [2021-12-21 13:55:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:14,875 INFO L87 Difference]: Start difference. First operand 2092 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:15,220 INFO L93 Difference]: Finished difference Result 5411 states and 7901 transitions. [2021-12-21 13:55:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-12-21 13:55:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:15,231 INFO L225 Difference]: With dead ends: 5411 [2021-12-21 13:55:15,232 INFO L226 Difference]: Without dead ends: 3651 [2021-12-21 13:55:15,236 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 13:55:15,238 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 419 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:15,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1396 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-12-21 13:55:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2021-12-21 13:55:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.4372258771929824) internal successors, (5243), 3648 states have internal predecessors, (5243), 0 states have call successors, (0), 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 13:55:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5243 transitions. [2021-12-21 13:55:15,507 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5243 transitions. Word has length 159 [2021-12-21 13:55:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:15,508 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5243 transitions. [2021-12-21 13:55:15,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5243 transitions. [2021-12-21 13:55:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 13:55:15,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:15,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:15,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:55:15,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1188374862, now seen corresponding path program 1 times [2021-12-21 13:55:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621435305] [2021-12-21 13:55:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:15,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:15,598 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 13:55:15,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621435305] [2021-12-21 13:55:15,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621435305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:15,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:15,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:55:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863841888] [2021-12-21 13:55:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:15,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:15,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:15,601 INFO L87 Difference]: Start difference. First operand 3649 states and 5243 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:16,125 INFO L93 Difference]: Finished difference Result 10381 states and 14906 transitions. [2021-12-21 13:55:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-12-21 13:55:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:16,146 INFO L225 Difference]: With dead ends: 10381 [2021-12-21 13:55:16,146 INFO L226 Difference]: Without dead ends: 6769 [2021-12-21 13:55:16,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:16,152 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 924 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:16,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1702 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2021-12-21 13:55:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6767. [2021-12-21 13:55:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 1.4238841265149276) internal successors, (9634), 6766 states have internal predecessors, (9634), 0 states have call successors, (0), 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 13:55:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 9634 transitions. [2021-12-21 13:55:16,642 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 9634 transitions. Word has length 159 [2021-12-21 13:55:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:16,642 INFO L470 AbstractCegarLoop]: Abstraction has 6767 states and 9634 transitions. [2021-12-21 13:55:16,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 9634 transitions. [2021-12-21 13:55:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 13:55:16,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:16,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:16,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:55:16,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash 504620971, now seen corresponding path program 1 times [2021-12-21 13:55:16,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:16,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846283612] [2021-12-21 13:55:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:16,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:16,719 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 13:55:16,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846283612] [2021-12-21 13:55:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846283612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:16,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:16,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:16,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399952248] [2021-12-21 13:55:16,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:16,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:16,721 INFO L87 Difference]: Start difference. First operand 6767 states and 9634 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:17,192 INFO L93 Difference]: Finished difference Result 13796 states and 19550 transitions. [2021-12-21 13:55:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:17,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-12-21 13:55:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:17,214 INFO L225 Difference]: With dead ends: 13796 [2021-12-21 13:55:17,215 INFO L226 Difference]: Without dead ends: 7146 [2021-12-21 13:55:17,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:17,224 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 987 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:17,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 1276 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-12-21 13:55:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 6991. [2021-12-21 13:55:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4143061516452073) internal successors, (9886), 6990 states have internal predecessors, (9886), 0 states have call successors, (0), 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 13:55:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9886 transitions. [2021-12-21 13:55:17,782 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9886 transitions. Word has length 159 [2021-12-21 13:55:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:17,783 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 9886 transitions. [2021-12-21 13:55:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:55:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9886 transitions. [2021-12-21 13:55:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 13:55:17,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:17,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:17,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:55:17,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1391753097, now seen corresponding path program 1 times [2021-12-21 13:55:17,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:17,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026050340] [2021-12-21 13:55:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:17,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:17,820 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 13:55:17,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026050340] [2021-12-21 13:55:17,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026050340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:17,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:17,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:17,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689518819] [2021-12-21 13:55:17,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:17,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:17,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:17,823 INFO L87 Difference]: Start difference. First operand 6991 states and 9886 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:55:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:18,606 INFO L93 Difference]: Finished difference Result 20247 states and 28724 transitions. [2021-12-21 13:55:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-12-21 13:55:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:18,633 INFO L225 Difference]: With dead ends: 20247 [2021-12-21 13:55:18,634 INFO L226 Difference]: Without dead ends: 13857 [2021-12-21 13:55:18,643 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 13:55:18,644 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 464 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:18,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1118 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2021-12-21 13:55:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 7007. [2021-12-21 13:55:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 1.4133599771624321) internal successors, (9902), 7006 states have internal predecessors, (9902), 0 states have call successors, (0), 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 13:55:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9902 transitions. [2021-12-21 13:55:19,212 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9902 transitions. Word has length 160 [2021-12-21 13:55:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:19,213 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 9902 transitions. [2021-12-21 13:55:19,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:55:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9902 transitions. [2021-12-21 13:55:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 13:55:19,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:19,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:19,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:55:19,222 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:19,222 INFO L85 PathProgramCache]: Analyzing trace with hash -911721654, now seen corresponding path program 1 times [2021-12-21 13:55:19,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:19,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907257163] [2021-12-21 13:55:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:19,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:19,289 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 13:55:19,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907257163] [2021-12-21 13:55:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907257163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:19,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:19,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:19,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164504778] [2021-12-21 13:55:19,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:19,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:19,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:19,291 INFO L87 Difference]: Start difference. First operand 7007 states and 9902 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 13:55:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:19,858 INFO L93 Difference]: Finished difference Result 14004 states and 19790 transitions. [2021-12-21 13:55:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-12-21 13:55:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:19,873 INFO L225 Difference]: With dead ends: 14004 [2021-12-21 13:55:19,873 INFO L226 Difference]: Without dead ends: 7005 [2021-12-21 13:55:19,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:19,885 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 65 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:19,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1542 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-12-21 13:55:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 7005. [2021-12-21 13:55:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7005 states, 7004 states have (on average 1.4131924614505997) internal successors, (9898), 7004 states have internal predecessors, (9898), 0 states have call successors, (0), 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 13:55:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9898 transitions. [2021-12-21 13:55:20,430 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9898 transitions. Word has length 161 [2021-12-21 13:55:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:20,431 INFO L470 AbstractCegarLoop]: Abstraction has 7005 states and 9898 transitions. [2021-12-21 13:55:20,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 13:55:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9898 transitions. [2021-12-21 13:55:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 13:55:20,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:20,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:20,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:55:20,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2124598414, now seen corresponding path program 1 times [2021-12-21 13:55:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:20,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123729840] [2021-12-21 13:55:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:20,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:20,475 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 13:55:20,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123729840] [2021-12-21 13:55:20,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123729840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:20,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:20,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:20,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132034625] [2021-12-21 13:55:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:20,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:20,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:20,478 INFO L87 Difference]: Start difference. First operand 7005 states and 9898 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 13:55:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:21,146 INFO L93 Difference]: Finished difference Result 16189 states and 22982 transitions. [2021-12-21 13:55:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-12-21 13:55:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:21,161 INFO L225 Difference]: With dead ends: 16189 [2021-12-21 13:55:21,161 INFO L226 Difference]: Without dead ends: 10395 [2021-12-21 13:55:21,167 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 13:55:21,167 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 424 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:21,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 1394 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-12-21 13:55:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10393. [2021-12-21 13:55:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10393 states, 10392 states have (on average 1.3914549653579678) internal successors, (14460), 10392 states have internal predecessors, (14460), 0 states have call successors, (0), 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 13:55:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14460 transitions. [2021-12-21 13:55:21,875 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14460 transitions. Word has length 161 [2021-12-21 13:55:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:21,876 INFO L470 AbstractCegarLoop]: Abstraction has 10393 states and 14460 transitions. [2021-12-21 13:55:21,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 13:55:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14460 transitions. [2021-12-21 13:55:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-21 13:55:21,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:21,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:21,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:55:21,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash -727385235, now seen corresponding path program 1 times [2021-12-21 13:55:21,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:21,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697853684] [2021-12-21 13:55:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:21,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:21,913 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 13:55:21,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697853684] [2021-12-21 13:55:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697853684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:21,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:21,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:21,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309370851] [2021-12-21 13:55:21,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:21,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:21,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:21,915 INFO L87 Difference]: Start difference. First operand 10393 states and 14460 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 13:55:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:23,122 INFO L93 Difference]: Finished difference Result 24303 states and 34628 transitions. [2021-12-21 13:55:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-12-21 13:55:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:23,148 INFO L225 Difference]: With dead ends: 24303 [2021-12-21 13:55:23,149 INFO L226 Difference]: Without dead ends: 15108 [2021-12-21 13:55:23,162 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 13:55:23,162 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 315 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:23,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1075 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2021-12-21 13:55:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 13181. [2021-12-21 13:55:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13181 states, 13180 states have (on average 1.4350531107738997) internal successors, (18914), 13180 states have internal predecessors, (18914), 0 states have call successors, (0), 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 13:55:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18914 transitions. [2021-12-21 13:55:24,450 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18914 transitions. Word has length 163 [2021-12-21 13:55:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 13181 states and 18914 transitions. [2021-12-21 13:55:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 13:55:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18914 transitions. [2021-12-21 13:55:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-21 13:55:24,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:24,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:24,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:55:24,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1248523357, now seen corresponding path program 1 times [2021-12-21 13:55:24,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:24,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166742556] [2021-12-21 13:55:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:24,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:24,492 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 13:55:24,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:24,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166742556] [2021-12-21 13:55:24,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166742556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:24,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:24,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:24,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253466669] [2021-12-21 13:55:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:24,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:24,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:24,494 INFO L87 Difference]: Start difference. First operand 13181 states and 18914 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:26,019 INFO L93 Difference]: Finished difference Result 29139 states and 42714 transitions. [2021-12-21 13:55:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:55:26,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-21 13:55:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:26,050 INFO L225 Difference]: With dead ends: 29139 [2021-12-21 13:55:26,051 INFO L226 Difference]: Without dead ends: 19243 [2021-12-21 13:55:26,065 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 13:55:26,066 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 310 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:26,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1035 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2021-12-21 13:55:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 17437. [2021-12-21 13:55:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4709795824730443) internal successors, (25648), 17436 states have internal predecessors, (25648), 0 states have call successors, (0), 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 13:55:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25648 transitions. [2021-12-21 13:55:27,551 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25648 transitions. Word has length 165 [2021-12-21 13:55:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:27,552 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25648 transitions. [2021-12-21 13:55:27,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25648 transitions. [2021-12-21 13:55:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 13:55:27,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:27,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:27,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:55:27,562 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash -846552929, now seen corresponding path program 1 times [2021-12-21 13:55:27,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:27,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735155354] [2021-12-21 13:55:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:27,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:27,608 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 13:55:27,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735155354] [2021-12-21 13:55:27,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735155354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:27,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:27,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:27,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262843816] [2021-12-21 13:55:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:27,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:27,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:27,610 INFO L87 Difference]: Start difference. First operand 17437 states and 25648 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:29,464 INFO L93 Difference]: Finished difference Result 33724 states and 49986 transitions. [2021-12-21 13:55:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:55:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-21 13:55:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:29,492 INFO L225 Difference]: With dead ends: 33724 [2021-12-21 13:55:29,493 INFO L226 Difference]: Without dead ends: 17437 [2021-12-21 13:55:29,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:55:29,510 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 1300 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:29,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 480 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2021-12-21 13:55:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2021-12-21 13:55:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4573296627666896) internal successors, (25410), 17436 states have internal predecessors, (25410), 0 states have call successors, (0), 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 13:55:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25410 transitions. [2021-12-21 13:55:31,409 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25410 transitions. Word has length 166 [2021-12-21 13:55:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25410 transitions. [2021-12-21 13:55:31,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25410 transitions. [2021-12-21 13:55:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 13:55:31,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:31,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:31,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:55:31,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash -316024710, now seen corresponding path program 1 times [2021-12-21 13:55:31,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:31,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895757294] [2021-12-21 13:55:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:31,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:31,488 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 13:55:31,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895757294] [2021-12-21 13:55:31,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895757294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:31,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:31,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:31,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480075217] [2021-12-21 13:55:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:31,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:31,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:31,490 INFO L87 Difference]: Start difference. First operand 17437 states and 25410 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:34,444 INFO L93 Difference]: Finished difference Result 43679 states and 65710 transitions. [2021-12-21 13:55:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-21 13:55:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:34,496 INFO L225 Difference]: With dead ends: 43679 [2021-12-21 13:55:34,497 INFO L226 Difference]: Without dead ends: 32388 [2021-12-21 13:55:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 13:55:34,516 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 690 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 965 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32388 states. [2021-12-21 13:55:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32388 to 32386. [2021-12-21 13:55:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32386 states, 32385 states have (on average 1.4722556739231125) internal successors, (47679), 32385 states have internal predecessors, (47679), 0 states have call successors, (0), 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 13:55:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32386 states to 32386 states and 47679 transitions. [2021-12-21 13:55:37,595 INFO L78 Accepts]: Start accepts. Automaton has 32386 states and 47679 transitions. Word has length 166 [2021-12-21 13:55:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:37,596 INFO L470 AbstractCegarLoop]: Abstraction has 32386 states and 47679 transitions. [2021-12-21 13:55:37,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32386 states and 47679 transitions. [2021-12-21 13:55:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 13:55:37,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:37,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:55:37,610 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 105363050, now seen corresponding path program 1 times [2021-12-21 13:55:37,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:37,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868218125] [2021-12-21 13:55:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:37,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:37,700 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 13:55:37,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868218125] [2021-12-21 13:55:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868218125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:37,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:37,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:55:37,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165121315] [2021-12-21 13:55:37,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:37,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:37,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:37,704 INFO L87 Difference]: Start difference. First operand 32386 states and 47679 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:44,992 INFO L93 Difference]: Finished difference Result 81978 states and 125897 transitions. [2021-12-21 13:55:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:55:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-21 13:55:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:45,131 INFO L225 Difference]: With dead ends: 81978 [2021-12-21 13:55:45,131 INFO L226 Difference]: Without dead ends: 71608 [2021-12-21 13:55:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:55:45,161 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1121 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:45,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 1489 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71608 states. [2021-12-21 13:55:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71608 to 53386. [2021-12-21 13:55:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 1.5093190971246604) internal successors, (80575), 53385 states have internal predecessors, (80575), 0 states have call successors, (0), 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 13:55:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 80575 transitions. [2021-12-21 13:55:51,191 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 80575 transitions. Word has length 166 [2021-12-21 13:55:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:51,191 INFO L470 AbstractCegarLoop]: Abstraction has 53386 states and 80575 transitions. [2021-12-21 13:55:51,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 80575 transitions. [2021-12-21 13:55:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 13:55:51,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:51,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:55:51,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:55:51,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 937564653, now seen corresponding path program 1 times [2021-12-21 13:55:51,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776763409] [2021-12-21 13:55:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:51,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:51,253 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 13:55:51,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:51,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776763409] [2021-12-21 13:55:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776763409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:51,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:51,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:55:51,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059089165] [2021-12-21 13:55:51,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:55:51,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:55:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:55:51,256 INFO L87 Difference]: Start difference. First operand 53386 states and 80575 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:56:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:56:01,158 INFO L93 Difference]: Finished difference Result 135200 states and 207035 transitions. [2021-12-21 13:56:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:56:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-21 13:56:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:56:01,314 INFO L225 Difference]: With dead ends: 135200 [2021-12-21 13:56:01,314 INFO L226 Difference]: Without dead ends: 92730 [2021-12-21 13:56:01,361 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 13:56:01,362 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 300 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:56:01,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 801 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:56:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92730 states.