./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-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 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:07:15,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:07:15,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:07:15,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:07:15,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:07:15,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:07:15,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:07:15,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:07:15,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:07:15,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:07:15,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:07:15,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:07:15,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:07:15,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:07:15,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:07:15,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:07:15,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:07:15,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:07:15,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:07:15,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:07:15,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:07:15,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:07:15,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:07:15,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:07:15,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:07:15,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:07:15,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:07:15,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:07:15,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:07:15,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:07:15,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:07:15,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:07:15,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:07:15,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:07:15,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:07:15,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:07:15,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:07:15,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:07:15,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:07:15,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:07:15,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:07:15,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:07:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:07:15,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:07:15,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:07:15,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:07:15,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:07:15,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:07:15,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:07:15,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:07:15,866 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:07:15,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:07:15,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:07:15,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:07:15,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:07:15,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:07:15,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:07:15,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:07:15,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:07:15,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:07:15,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:07:15,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:07:15,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:07:15,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:07:15,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:07:15,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:07:15,872 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:07:15,872 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:07:15,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:07:15,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:07:15,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2021-12-14 15:07:16,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:07:16,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:07:16,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:07:16,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:07:16,145 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:07:16,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:07:16,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc552ab0b/df491a9bc57d40ec992b95b0f90be47a/FLAG128f1c956 [2021-12-14 15:07:16,636 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:07:16,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:07:16,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc552ab0b/df491a9bc57d40ec992b95b0f90be47a/FLAG128f1c956 [2021-12-14 15:07:17,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc552ab0b/df491a9bc57d40ec992b95b0f90be47a [2021-12-14 15:07:17,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:07:17,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:07:17,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:07:17,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:07:17,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:07:17,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25140af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17, skipping insertion in model container [2021-12-14 15:07:17,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:07:17,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:07:17,244 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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-12-14 15:07:17,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:07:17,294 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:07:17,333 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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-12-14 15:07:17,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:07:17,372 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:07:17,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17 WrapperNode [2021-12-14 15:07:17,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:07:17,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:07:17,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:07:17,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:07:17,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,437 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2021-12-14 15:07:17,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:07:17,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:07:17,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:07:17,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:07:17,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:07:17,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:07:17,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:07:17,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:07:17,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (1/1) ... [2021-12-14 15:07:17,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:07:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:07:17,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 15:07:17,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 15:07:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:07:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:07:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:07:17,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:07:17,716 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:07:17,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:07:18,072 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:07:18,077 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:07:18,078 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:07:18,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:18 BoogieIcfgContainer [2021-12-14 15:07:18,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:07:18,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:07:18,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:07:18,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:07:18,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:07:17" (1/3) ... [2021-12-14 15:07:18,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1d9e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:18, skipping insertion in model container [2021-12-14 15:07:18,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:17" (2/3) ... [2021-12-14 15:07:18,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1d9e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:18, skipping insertion in model container [2021-12-14 15:07:18,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:18" (3/3) ... [2021-12-14 15:07:18,090 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:07:18,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:07:18,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:07:18,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:07:18,140 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 15:07:18,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:07:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 15:07:18,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:18,187 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] [2021-12-14 15:07:18,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:18,200 INFO L85 PathProgramCache]: Analyzing trace with hash -278043806, now seen corresponding path program 1 times [2021-12-14 15:07:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:18,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376119237] [2021-12-14 15:07:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:18,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:18,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376119237] [2021-12-14 15:07:18,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376119237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:18,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:18,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:18,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526930302] [2021-12-14 15:07:18,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:18,534 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:18,661 INFO L93 Difference]: Finished difference Result 297 states and 500 transitions. [2021-12-14 15:07:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-14 15:07:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:18,673 INFO L225 Difference]: With dead ends: 297 [2021-12-14 15:07:18,674 INFO L226 Difference]: Without dead ends: 205 [2021-12-14 15:07:18,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:18,684 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 132 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:18,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 406 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:07:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-14 15:07:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-12-14 15:07:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5970149253731343) internal successors, (321), 201 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2021-12-14 15:07:18,754 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 50 [2021-12-14 15:07:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:18,755 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2021-12-14 15:07:18,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2021-12-14 15:07:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 15:07:18,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:18,761 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] [2021-12-14 15:07:18,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:07:18,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1333847823, now seen corresponding path program 1 times [2021-12-14 15:07:18,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:18,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260984596] [2021-12-14 15:07:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:18,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:18,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:18,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260984596] [2021-12-14 15:07:18,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260984596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:18,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:18,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:18,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686131883] [2021-12-14 15:07:18,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:18,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:18,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:18,963 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:19,020 INFO L93 Difference]: Finished difference Result 496 states and 805 transitions. [2021-12-14 15:07:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-14 15:07:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:19,024 INFO L225 Difference]: With dead ends: 496 [2021-12-14 15:07:19,024 INFO L226 Difference]: Without dead ends: 342 [2021-12-14 15:07:19,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:19,030 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 118 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:19,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 385 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-14 15:07:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2021-12-14 15:07:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.6112759643916914) internal successors, (543), 337 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 543 transitions. [2021-12-14 15:07:19,061 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 543 transitions. Word has length 52 [2021-12-14 15:07:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:19,061 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 543 transitions. [2021-12-14 15:07:19,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 543 transitions. [2021-12-14 15:07:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:07:19,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:19,063 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] [2021-12-14 15:07:19,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:07:19,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 329846722, now seen corresponding path program 1 times [2021-12-14 15:07:19,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698712511] [2021-12-14 15:07:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:19,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:19,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698712511] [2021-12-14 15:07:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698712511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:19,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:19,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220398993] [2021-12-14 15:07:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:19,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:19,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:19,131 INFO L87 Difference]: Start difference. First operand 338 states and 543 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:19,177 INFO L93 Difference]: Finished difference Result 890 states and 1445 transitions. [2021-12-14 15:07:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-14 15:07:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:19,181 INFO L225 Difference]: With dead ends: 890 [2021-12-14 15:07:19,181 INFO L226 Difference]: Without dead ends: 600 [2021-12-14 15:07:19,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:19,185 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 113 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:19,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 386 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-12-14 15:07:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2021-12-14 15:07:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.6104553119730185) internal successors, (955), 593 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 955 transitions. [2021-12-14 15:07:19,220 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 955 transitions. Word has length 54 [2021-12-14 15:07:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:19,223 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 955 transitions. [2021-12-14 15:07:19,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 955 transitions. [2021-12-14 15:07:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 15:07:19,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:19,225 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] [2021-12-14 15:07:19,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:07:19,226 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1296814383, now seen corresponding path program 1 times [2021-12-14 15:07:19,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:19,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075179762] [2021-12-14 15:07:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:19,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:19,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075179762] [2021-12-14 15:07:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075179762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:19,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:19,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:19,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667792900] [2021-12-14 15:07:19,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:19,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:19,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:19,309 INFO L87 Difference]: Start difference. First operand 594 states and 955 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:19,539 INFO L93 Difference]: Finished difference Result 2582 states and 4241 transitions. [2021-12-14 15:07:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:07:19,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-14 15:07:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:19,547 INFO L225 Difference]: With dead ends: 2582 [2021-12-14 15:07:19,547 INFO L226 Difference]: Without dead ends: 2036 [2021-12-14 15:07:19,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:07:19,556 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 851 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:19,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1294 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:07:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-12-14 15:07:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1071. [2021-12-14 15:07:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.6196261682242992) internal successors, (1733), 1070 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1733 transitions. [2021-12-14 15:07:19,605 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1733 transitions. Word has length 56 [2021-12-14 15:07:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:19,606 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1733 transitions. [2021-12-14 15:07:19,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1733 transitions. [2021-12-14 15:07:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 15:07:19,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:19,608 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] [2021-12-14 15:07:19,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:07:19,608 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1484036003, now seen corresponding path program 1 times [2021-12-14 15:07:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226563847] [2021-12-14 15:07:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:19,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:19,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226563847] [2021-12-14 15:07:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226563847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:19,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:19,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:19,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471427959] [2021-12-14 15:07:19,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:19,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:19,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:19,665 INFO L87 Difference]: Start difference. First operand 1071 states and 1733 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:19,778 INFO L93 Difference]: Finished difference Result 3136 states and 5140 transitions. [2021-12-14 15:07:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-14 15:07:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:19,786 INFO L225 Difference]: With dead ends: 3136 [2021-12-14 15:07:19,786 INFO L226 Difference]: Without dead ends: 2113 [2021-12-14 15:07:19,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:19,789 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 404 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:19,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 606 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-14 15:07:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1583. [2021-12-14 15:07:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.6270543615676358) internal successors, (2574), 1582 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2574 transitions. [2021-12-14 15:07:19,862 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2574 transitions. Word has length 57 [2021-12-14 15:07:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:19,862 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2574 transitions. [2021-12-14 15:07:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2574 transitions. [2021-12-14 15:07:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 15:07:19,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:19,864 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] [2021-12-14 15:07:19,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:07:19,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1297470346, now seen corresponding path program 1 times [2021-12-14 15:07:19,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:19,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897362092] [2021-12-14 15:07:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:19,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:19,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:19,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897362092] [2021-12-14 15:07:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897362092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:19,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:19,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:19,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701534583] [2021-12-14 15:07:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:19,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:19,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:19,936 INFO L87 Difference]: Start difference. First operand 1583 states and 2574 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:20,117 INFO L93 Difference]: Finished difference Result 4604 states and 7538 transitions. [2021-12-14 15:07:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-14 15:07:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:20,130 INFO L225 Difference]: With dead ends: 4604 [2021-12-14 15:07:20,131 INFO L226 Difference]: Without dead ends: 3069 [2021-12-14 15:07:20,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:20,135 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 402 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:20,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 649 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-12-14 15:07:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2314. [2021-12-14 15:07:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 1.6260268050151319) internal successors, (3761), 2313 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3761 transitions. [2021-12-14 15:07:20,258 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3761 transitions. Word has length 58 [2021-12-14 15:07:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:20,258 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 3761 transitions. [2021-12-14 15:07:20,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3761 transitions. [2021-12-14 15:07:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 15:07:20,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:20,260 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] [2021-12-14 15:07:20,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:07:20,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -370820470, now seen corresponding path program 1 times [2021-12-14 15:07:20,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:20,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874289982] [2021-12-14 15:07:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:20,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:20,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:20,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874289982] [2021-12-14 15:07:20,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874289982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:20,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:20,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:20,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173546821] [2021-12-14 15:07:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:20,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:20,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:20,290 INFO L87 Difference]: Start difference. First operand 2314 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:20,417 INFO L93 Difference]: Finished difference Result 5104 states and 8336 transitions. [2021-12-14 15:07:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-14 15:07:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:20,429 INFO L225 Difference]: With dead ends: 5104 [2021-12-14 15:07:20,429 INFO L226 Difference]: Without dead ends: 3495 [2021-12-14 15:07:20,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:20,432 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 117 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:20,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 451 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-12-14 15:07:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3493. [2021-12-14 15:07:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.622852233676976) internal successors, (5667), 3492 states have internal predecessors, (5667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5667 transitions. [2021-12-14 15:07:20,560 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5667 transitions. Word has length 59 [2021-12-14 15:07:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:20,561 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5667 transitions. [2021-12-14 15:07:20,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5667 transitions. [2021-12-14 15:07:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 15:07:20,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:20,562 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] [2021-12-14 15:07:20,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:07:20,563 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1594203451, now seen corresponding path program 1 times [2021-12-14 15:07:20,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:20,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265751136] [2021-12-14 15:07:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:20,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:20,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265751136] [2021-12-14 15:07:20,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265751136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:20,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:20,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:20,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682559874] [2021-12-14 15:07:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:20,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:20,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:20,592 INFO L87 Difference]: Start difference. First operand 3493 states and 5667 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:20,755 INFO L93 Difference]: Finished difference Result 6911 states and 11267 transitions. [2021-12-14 15:07:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-14 15:07:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:20,773 INFO L225 Difference]: With dead ends: 6911 [2021-12-14 15:07:20,773 INFO L226 Difference]: Without dead ends: 4911 [2021-12-14 15:07:20,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:20,779 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:20,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 434 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-12-14 15:07:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4909. [2021-12-14 15:07:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.6187856560717195) internal successors, (7945), 4908 states have internal predecessors, (7945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 7945 transitions. [2021-12-14 15:07:20,971 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 7945 transitions. Word has length 59 [2021-12-14 15:07:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:20,971 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 7945 transitions. [2021-12-14 15:07:20,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 7945 transitions. [2021-12-14 15:07:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 15:07:20,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:20,973 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] [2021-12-14 15:07:20,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:07:20,973 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1620263222, now seen corresponding path program 1 times [2021-12-14 15:07:20,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87227177] [2021-12-14 15:07:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:20,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:21,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87227177] [2021-12-14 15:07:21,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87227177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:21,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:21,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:21,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527446431] [2021-12-14 15:07:21,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:21,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:21,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:21,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:21,007 INFO L87 Difference]: Start difference. First operand 4909 states and 7945 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:21,415 INFO L93 Difference]: Finished difference Result 15138 states and 24625 transitions. [2021-12-14 15:07:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:07:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-14 15:07:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:21,452 INFO L225 Difference]: With dead ends: 15138 [2021-12-14 15:07:21,453 INFO L226 Difference]: Without dead ends: 10357 [2021-12-14 15:07:21,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:21,466 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 400 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:21,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 565 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2021-12-14 15:07:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 7607. [2021-12-14 15:07:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 1.6149092821456745) internal successors, (12283), 7606 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 12283 transitions. [2021-12-14 15:07:21,815 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 12283 transitions. Word has length 59 [2021-12-14 15:07:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:21,815 INFO L470 AbstractCegarLoop]: Abstraction has 7607 states and 12283 transitions. [2021-12-14 15:07:21,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 12283 transitions. [2021-12-14 15:07:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 15:07:21,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:21,816 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] [2021-12-14 15:07:21,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:07:21,816 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -515214271, now seen corresponding path program 1 times [2021-12-14 15:07:21,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:21,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22727713] [2021-12-14 15:07:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:21,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:21,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22727713] [2021-12-14 15:07:21,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22727713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:21,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:21,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:21,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950866959] [2021-12-14 15:07:21,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:21,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:21,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:21,841 INFO L87 Difference]: Start difference. First operand 7607 states and 12283 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:22,158 INFO L93 Difference]: Finished difference Result 16681 states and 27278 transitions. [2021-12-14 15:07:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-14 15:07:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:22,186 INFO L225 Difference]: With dead ends: 16681 [2021-12-14 15:07:22,186 INFO L226 Difference]: Without dead ends: 11156 [2021-12-14 15:07:22,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:22,199 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 122 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:22,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-12-14 15:07:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-12-14 15:07:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6192055949072) internal successors, (18059), 11153 states have internal predecessors, (18059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 18059 transitions. [2021-12-14 15:07:22,686 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 18059 transitions. Word has length 59 [2021-12-14 15:07:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:22,686 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 18059 transitions. [2021-12-14 15:07:22,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 18059 transitions. [2021-12-14 15:07:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 15:07:22,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:22,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:22,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:07:22,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash 482860251, now seen corresponding path program 1 times [2021-12-14 15:07:22,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210718944] [2021-12-14 15:07:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:22,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:22,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210718944] [2021-12-14 15:07:22,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210718944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:22,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:22,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:22,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3099852] [2021-12-14 15:07:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:22,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:22,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:22,768 INFO L87 Difference]: Start difference. First operand 11154 states and 18059 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:23,211 INFO L93 Difference]: Finished difference Result 22235 states and 36014 transitions. [2021-12-14 15:07:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 15:07:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:23,237 INFO L225 Difference]: With dead ends: 22235 [2021-12-14 15:07:23,237 INFO L226 Difference]: Without dead ends: 11156 [2021-12-14 15:07:23,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:07:23,254 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 285 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:23,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 559 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-12-14 15:07:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-12-14 15:07:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6079978481126154) internal successors, (17934), 11153 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 17934 transitions. [2021-12-14 15:07:23,634 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 17934 transitions. Word has length 61 [2021-12-14 15:07:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 17934 transitions. [2021-12-14 15:07:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 17934 transitions. [2021-12-14 15:07:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:07:23,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:23,635 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] [2021-12-14 15:07:23,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:07:23,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1004302872, now seen corresponding path program 1 times [2021-12-14 15:07:23,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561961066] [2021-12-14 15:07:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:23,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:23,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561961066] [2021-12-14 15:07:23,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561961066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:23,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:23,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:23,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013884106] [2021-12-14 15:07:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:23,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:23,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:23,698 INFO L87 Difference]: Start difference. First operand 11154 states and 17934 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:24,436 INFO L93 Difference]: Finished difference Result 31937 states and 51506 transitions. [2021-12-14 15:07:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-14 15:07:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:24,481 INFO L225 Difference]: With dead ends: 31937 [2021-12-14 15:07:24,481 INFO L226 Difference]: Without dead ends: 20858 [2021-12-14 15:07:24,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:07:24,502 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 392 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:24,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 567 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20858 states. [2021-12-14 15:07:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20858 to 20856. [2021-12-14 15:07:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20856 states, 20855 states have (on average 1.596116039319108) internal successors, (33287), 20855 states have internal predecessors, (33287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20856 states to 20856 states and 33287 transitions. [2021-12-14 15:07:25,471 INFO L78 Accepts]: Start accepts. Automaton has 20856 states and 33287 transitions. Word has length 64 [2021-12-14 15:07:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:25,472 INFO L470 AbstractCegarLoop]: Abstraction has 20856 states and 33287 transitions. [2021-12-14 15:07:25,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 20856 states and 33287 transitions. [2021-12-14 15:07:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 15:07:25,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:25,473 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] [2021-12-14 15:07:25,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:07:25,473 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1070527272, now seen corresponding path program 1 times [2021-12-14 15:07:25,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:25,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667873071] [2021-12-14 15:07:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:25,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:07:25,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:25,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667873071] [2021-12-14 15:07:25,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667873071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:25,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:25,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:25,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132994806] [2021-12-14 15:07:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:25,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:25,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:25,550 INFO L87 Difference]: Start difference. First operand 20856 states and 33287 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:26,894 INFO L93 Difference]: Finished difference Result 39968 states and 63509 transitions. [2021-12-14 15:07:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:07:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-14 15:07:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:26,971 INFO L225 Difference]: With dead ends: 39968 [2021-12-14 15:07:26,971 INFO L226 Difference]: Without dead ends: 39966 [2021-12-14 15:07:26,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:07:26,987 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:26,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 956 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39966 states. [2021-12-14 15:07:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39966 to 21580. [2021-12-14 15:07:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21580 states, 21579 states have (on average 1.5756985958570833) internal successors, (34002), 21579 states have internal predecessors, (34002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 34002 transitions. [2021-12-14 15:07:28,156 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 34002 transitions. Word has length 65 [2021-12-14 15:07:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 21580 states and 34002 transitions. [2021-12-14 15:07:28,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 34002 transitions. [2021-12-14 15:07:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:28,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:28,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:28,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:07:28,159 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1104420716, now seen corresponding path program 1 times [2021-12-14 15:07:28,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:28,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082623910] [2021-12-14 15:07:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:28,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 15:07:28,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082623910] [2021-12-14 15:07:28,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082623910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:28,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:28,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:28,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519808876] [2021-12-14 15:07:28,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:28,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:28,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:28,217 INFO L87 Difference]: Start difference. First operand 21580 states and 34002 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:30,027 INFO L93 Difference]: Finished difference Result 52596 states and 83206 transitions. [2021-12-14 15:07:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-14 15:07:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:30,115 INFO L225 Difference]: With dead ends: 52596 [2021-12-14 15:07:30,115 INFO L226 Difference]: Without dead ends: 42404 [2021-12-14 15:07:30,149 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 [2021-12-14 15:07:30,150 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 509 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:30,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 976 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42404 states. [2021-12-14 15:07:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42404 to 33114. [2021-12-14 15:07:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33114 states, 33113 states have (on average 1.5749101561320327) internal successors, (52150), 33113 states have internal predecessors, (52150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33114 states to 33114 states and 52150 transitions. [2021-12-14 15:07:31,974 INFO L78 Accepts]: Start accepts. Automaton has 33114 states and 52150 transitions. Word has length 87 [2021-12-14 15:07:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:31,974 INFO L470 AbstractCegarLoop]: Abstraction has 33114 states and 52150 transitions. [2021-12-14 15:07:31,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33114 states and 52150 transitions. [2021-12-14 15:07:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:31,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:31,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:31,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:07:31,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1225522659, now seen corresponding path program 1 times [2021-12-14 15:07:31,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519060702] [2021-12-14 15:07:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:31,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 15:07:32,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519060702] [2021-12-14 15:07:32,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519060702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:32,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:32,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:32,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643979119] [2021-12-14 15:07:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:32,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:32,043 INFO L87 Difference]: Start difference. First operand 33114 states and 52150 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:34,164 INFO L93 Difference]: Finished difference Result 56648 states and 89642 transitions. [2021-12-14 15:07:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-14 15:07:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:34,256 INFO L225 Difference]: With dead ends: 56648 [2021-12-14 15:07:34,257 INFO L226 Difference]: Without dead ends: 46456 [2021-12-14 15:07:34,291 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 [2021-12-14 15:07:34,292 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 517 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:34,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 909 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46456 states. [2021-12-14 15:07:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46456 to 44802. [2021-12-14 15:07:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44802 states, 44801 states have (on average 1.5761701747728845) internal successors, (70614), 44801 states have internal predecessors, (70614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44802 states to 44802 states and 70614 transitions. [2021-12-14 15:07:36,516 INFO L78 Accepts]: Start accepts. Automaton has 44802 states and 70614 transitions. Word has length 87 [2021-12-14 15:07:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:36,516 INFO L470 AbstractCegarLoop]: Abstraction has 44802 states and 70614 transitions. [2021-12-14 15:07:36,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 44802 states and 70614 transitions. [2021-12-14 15:07:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 15:07:36,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:36,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:36,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:07:36,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 960026915, now seen corresponding path program 1 times [2021-12-14 15:07:36,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:36,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493340778] [2021-12-14 15:07:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:36,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 15:07:36,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:36,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493340778] [2021-12-14 15:07:36,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493340778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:36,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:36,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:07:36,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189503157] [2021-12-14 15:07:36,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:07:36,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:07:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:07:36,572 INFO L87 Difference]: Start difference. First operand 44802 states and 70614 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:38,901 INFO L93 Difference]: Finished difference Result 63518 states and 100702 transitions. [2021-12-14 15:07:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:07:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-14 15:07:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:39,028 INFO L225 Difference]: With dead ends: 63518 [2021-12-14 15:07:39,028 INFO L226 Difference]: Without dead ends: 53096 [2021-12-14 15:07:39,061 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 [2021-12-14 15:07:39,061 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 506 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1008 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53096 states. [2021-12-14 15:07:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53096 to 51442. [2021-12-14 15:07:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51442 states, 51441 states have (on average 1.5791683676444859) internal successors, (81234), 51441 states have internal predecessors, (81234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 81234 transitions. [2021-12-14 15:07:41,804 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 81234 transitions. Word has length 87 [2021-12-14 15:07:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:41,805 INFO L470 AbstractCegarLoop]: Abstraction has 51442 states and 81234 transitions. [2021-12-14 15:07:41,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 81234 transitions. [2021-12-14 15:07:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 15:07:41,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:41,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:07:41,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1600537049, now seen corresponding path program 1 times [2021-12-14 15:07:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792214386] [2021-12-14 15:07:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 15:07:41,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792214386] [2021-12-14 15:07:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792214386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:41,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:41,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:07:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229272723] [2021-12-14 15:07:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:07:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:07:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:41,842 INFO L87 Difference]: Start difference. First operand 51442 states and 81234 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:07:45,770 INFO L93 Difference]: Finished difference Result 113249 states and 179766 transitions. [2021-12-14 15:07:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:07:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-14 15:07:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:07:45,944 INFO L225 Difference]: With dead ends: 113249 [2021-12-14 15:07:45,944 INFO L226 Difference]: Without dead ends: 82689 [2021-12-14 15:07:45,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:07:45,988 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 103 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:07:45,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 372 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:07:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82689 states. [2021-12-14 15:07:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82689 to 82484. [2021-12-14 15:07:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82484 states, 82483 states have (on average 1.581804735521259) internal successors, (130472), 82483 states have internal predecessors, (130472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82484 states to 82484 states and 130472 transitions. [2021-12-14 15:07:50,158 INFO L78 Accepts]: Start accepts. Automaton has 82484 states and 130472 transitions. Word has length 88 [2021-12-14 15:07:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:07:50,159 INFO L470 AbstractCegarLoop]: Abstraction has 82484 states and 130472 transitions. [2021-12-14 15:07:50,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:07:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 82484 states and 130472 transitions. [2021-12-14 15:07:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 15:07:50,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:07:50,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:07:50,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:07:50,161 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:07:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:07:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash -366440913, now seen corresponding path program 1 times [2021-12-14 15:07:50,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:07:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218702627] [2021-12-14 15:07:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:07:50,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:07:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:07:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 15:07:50,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:07:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218702627] [2021-12-14 15:07:50,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218702627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:07:50,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:07:50,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:07:50,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902396693] [2021-12-14 15:07:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:07:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:07:50,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:07:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:07:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:07:50,204 INFO L87 Difference]: Start difference. First operand 82484 states and 130472 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)