./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-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_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-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 cc839390ce90c7793a3060b323c83e9a1c067374beb1721b491d5c2fbf639881 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:23:12,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:23:12,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:23:12,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:23:12,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:23:12,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:23:12,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:23:12,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:23:12,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:23:12,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:23:12,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:23:12,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:23:12,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:23:12,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:23:12,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:23:12,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:23:12,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:23:12,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:23:12,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:23:12,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:23:12,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:23:12,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:23:12,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:23:12,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:23:12,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:23:12,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:23:12,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:23:12,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:23:12,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:23:12,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:23:12,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:23:12,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:23:12,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:23:12,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:23:12,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:23:12,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:23:12,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:23:12,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:23:12,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:23:12,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:23:12,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:23:12,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:23:12,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:23:12,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:23:12,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:23:12,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:23:12,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:23:12,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:23:12,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:23:12,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:23:12,931 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:23:12,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:23:12,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:23:12,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:23:12,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:23:12,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:23:12,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:23:12,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:23:12,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:23:12,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:23:12,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:23:12,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:23:12,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:23:12,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:23:12,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:23:12,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:23:12,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:23:12,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:23:12,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:23:12,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:23:12,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:23:12,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:23:12,936 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:23:12,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:23:12,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:23:12,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:23:12,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc839390ce90c7793a3060b323c83e9a1c067374beb1721b491d5c2fbf639881 [2021-12-14 15:23:13,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:23:13,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:23:13,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:23:13,229 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:23:13,230 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:23:13,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-12-14 15:23:13,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413c249a4/6c910a3338824448bec545dbc609a5cf/FLAG316fc8743 [2021-12-14 15:23:13,794 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:23:13,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-12-14 15:23:13,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413c249a4/6c910a3338824448bec545dbc609a5cf/FLAG316fc8743 [2021-12-14 15:23:14,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/413c249a4/6c910a3338824448bec545dbc609a5cf [2021-12-14 15:23:14,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:23:14,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:23:14,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:23:14,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:23:14,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:23:14,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:23:14" (1/1) ... [2021-12-14 15:23:14,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778c91b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:14, skipping insertion in model container [2021-12-14 15:23:14,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:23:14" (1/1) ... [2021-12-14 15:23:14,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:23:14,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:23:14,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15613,15626] [2021-12-14 15:23:14,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16673,16686] [2021-12-14 15:23:14,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[28981,28994] [2021-12-14 15:23:14,795 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[29628,29641] [2021-12-14 15:23:14,804 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[30969,30982] [2021-12-14 15:23:14,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:23:14,839 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:23:14,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15613,15626] [2021-12-14 15:23:14,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16673,16686] [2021-12-14 15:23:15,070 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[28981,28994] [2021-12-14 15:23:15,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[29628,29641] [2021-12-14 15:23:15,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[30969,30982] [2021-12-14 15:23:15,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:23:15,111 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:23:15,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15 WrapperNode [2021-12-14 15:23:15,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:23:15,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:23:15,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:23:15,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:23:15,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,222 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1689 [2021-12-14 15:23:15,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:23:15,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:23:15,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:23:15,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:23:15,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:23:15,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:23:15,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:23:15,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:23:15,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (1/1) ... [2021-12-14 15:23:15,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:23:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:23:15,337 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 15:23:15,360 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 15:23:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:23:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:23:15,537 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:23:15,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:23:16,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:23:16,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:23:16,420 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:23:16,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:23:16 BoogieIcfgContainer [2021-12-14 15:23:16,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:23:16,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:23:16,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:23:16,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:23:16,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:23:14" (1/3) ... [2021-12-14 15:23:16,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d352e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:23:16, skipping insertion in model container [2021-12-14 15:23:16,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:15" (2/3) ... [2021-12-14 15:23:16,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d352e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:23:16, skipping insertion in model container [2021-12-14 15:23:16,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:23:16" (3/3) ... [2021-12-14 15:23:16,431 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-12-14 15:23:16,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:23:16,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-12-14 15:23:16,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:23:16,493 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 15:23:16,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-14 15:23:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 407 states have (on average 1.805896805896806) internal successors, (735), 412 states have internal predecessors, (735), 0 states have call successors, (0), 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 15:23:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-14 15:23:16,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:16,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:16,535 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -969410714, now seen corresponding path program 1 times [2021-12-14 15:23:16,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630790367] [2021-12-14 15:23:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:16,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:16,974 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 15:23:16,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630790367] [2021-12-14 15:23:16,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630790367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:16,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:16,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:16,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397201983] [2021-12-14 15:23:16,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:16,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:17,006 INFO L87 Difference]: Start difference. First operand has 413 states, 407 states have (on average 1.805896805896806) internal successors, (735), 412 states have internal predecessors, (735), 0 states have call successors, (0), 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 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 15:23:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:17,192 INFO L93 Difference]: Finished difference Result 742 states and 1300 transitions. [2021-12-14 15:23:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-12-14 15:23:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:17,210 INFO L225 Difference]: With dead ends: 742 [2021-12-14 15:23:17,215 INFO L226 Difference]: Without dead ends: 595 [2021-12-14 15:23:17,219 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 15:23:17,231 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 461 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:17,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1147 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:23:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-14 15:23:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2021-12-14 15:23:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 588 states have (on average 1.4829931972789117) internal successors, (872), 592 states have internal predecessors, (872), 0 states have call successors, (0), 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 15:23:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 872 transitions. [2021-12-14 15:23:17,338 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 872 transitions. Word has length 148 [2021-12-14 15:23:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:17,339 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 872 transitions. [2021-12-14 15:23:17,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 15:23:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 872 transitions. [2021-12-14 15:23:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-14 15:23:17,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:17,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:17,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:23:17,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1257328890, now seen corresponding path program 1 times [2021-12-14 15:23:17,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848867014] [2021-12-14 15:23:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:17,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:17,583 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 15:23:17,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848867014] [2021-12-14 15:23:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848867014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:17,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:17,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:17,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360823383] [2021-12-14 15:23:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:17,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:17,595 INFO L87 Difference]: Start difference. First operand 593 states and 872 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 15:23:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:17,704 INFO L93 Difference]: Finished difference Result 1733 states and 2539 transitions. [2021-12-14 15:23:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:17,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-12-14 15:23:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:17,715 INFO L225 Difference]: With dead ends: 1733 [2021-12-14 15:23:17,715 INFO L226 Difference]: Without dead ends: 1149 [2021-12-14 15:23:17,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:17,721 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 1262 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:17,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1262 Valid, 1492 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-12-14 15:23:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1123. [2021-12-14 15:23:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1118 states have (on average 1.4695885509838997) internal successors, (1643), 1122 states have internal predecessors, (1643), 0 states have call successors, (0), 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 15:23:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1643 transitions. [2021-12-14 15:23:17,819 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1643 transitions. Word has length 148 [2021-12-14 15:23:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:17,820 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1643 transitions. [2021-12-14 15:23:17,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 15:23:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1643 transitions. [2021-12-14 15:23:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 15:23:17,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:17,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:17,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:23:17,835 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 56469786, now seen corresponding path program 1 times [2021-12-14 15:23:17,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:17,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219726417] [2021-12-14 15:23:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:17,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:17,898 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 15:23:17,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:17,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219726417] [2021-12-14 15:23:17,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219726417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:17,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:17,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:17,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814651522] [2021-12-14 15:23:17,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:17,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:17,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:17,905 INFO L87 Difference]: Start difference. First operand 1123 states and 1643 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 15:23:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:17,971 INFO L93 Difference]: Finished difference Result 3331 states and 4867 transitions. [2021-12-14 15:23:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:17,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2021-12-14 15:23:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:17,981 INFO L225 Difference]: With dead ends: 3331 [2021-12-14 15:23:17,981 INFO L226 Difference]: Without dead ends: 2236 [2021-12-14 15:23:17,983 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 15:23:17,985 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 580 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:17,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1369 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-12-14 15:23:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1125. [2021-12-14 15:23:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1120 states have (on average 1.46875) internal successors, (1645), 1124 states have internal predecessors, (1645), 0 states have call successors, (0), 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 15:23:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1645 transitions. [2021-12-14 15:23:18,059 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1645 transitions. Word has length 149 [2021-12-14 15:23:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1645 transitions. [2021-12-14 15:23:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 15:23:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1645 transitions. [2021-12-14 15:23:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-14 15:23:18,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:18,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:23:18,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:23:18,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1493517127, now seen corresponding path program 1 times [2021-12-14 15:23:18,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:18,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646334441] [2021-12-14 15:23:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:18,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:18,260 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 15:23:18,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:18,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646334441] [2021-12-14 15:23:18,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646334441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:18,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:18,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:18,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766493611] [2021-12-14 15:23:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:18,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:18,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:18,263 INFO L87 Difference]: Start difference. First operand 1125 states and 1645 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 15:23:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:18,411 INFO L93 Difference]: Finished difference Result 3257 states and 4739 transitions. [2021-12-14 15:23:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-12-14 15:23:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:18,420 INFO L225 Difference]: With dead ends: 3257 [2021-12-14 15:23:18,420 INFO L226 Difference]: Without dead ends: 2162 [2021-12-14 15:23:18,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:18,427 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 1235 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:18,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 1494 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-12-14 15:23:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2136. [2021-12-14 15:23:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2131 states have (on average 1.4514312529328954) internal successors, (3093), 2135 states have internal predecessors, (3093), 0 states have call successors, (0), 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 15:23:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3093 transitions. [2021-12-14 15:23:18,530 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3093 transitions. Word has length 150 [2021-12-14 15:23:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:18,531 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 3093 transitions. [2021-12-14 15:23:18,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 15:23:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3093 transitions. [2021-12-14 15:23:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-14 15:23:18,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:18,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:18,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:23:18,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash 403786939, now seen corresponding path program 1 times [2021-12-14 15:23:18,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684804852] [2021-12-14 15:23:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:18,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:18,585 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 15:23:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684804852] [2021-12-14 15:23:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684804852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:18,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:18,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695984630] [2021-12-14 15:23:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:18,588 INFO L87 Difference]: Start difference. First operand 2136 states and 3093 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 15:23:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:18,756 INFO L93 Difference]: Finished difference Result 6332 states and 9159 transitions. [2021-12-14 15:23:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:18,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-12-14 15:23:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:18,773 INFO L225 Difference]: With dead ends: 6332 [2021-12-14 15:23:18,773 INFO L226 Difference]: Without dead ends: 4240 [2021-12-14 15:23:18,779 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 15:23:18,780 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 566 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1736 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-12-14 15:23:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 2140. [2021-12-14 15:23:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2135 states have (on average 1.4505854800936768) internal successors, (3097), 2139 states have internal predecessors, (3097), 0 states have call successors, (0), 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 15:23:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 3097 transitions. [2021-12-14 15:23:18,940 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 3097 transitions. Word has length 151 [2021-12-14 15:23:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 3097 transitions. [2021-12-14 15:23:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 15:23:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 3097 transitions. [2021-12-14 15:23:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-14 15:23:18,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:18,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:18,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:23:18,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -865780987, now seen corresponding path program 1 times [2021-12-14 15:23:18,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797714824] [2021-12-14 15:23:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:18,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:19,019 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 15:23:19,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797714824] [2021-12-14 15:23:19,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797714824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:19,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:19,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:19,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126867060] [2021-12-14 15:23:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:19,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:19,022 INFO L87 Difference]: Start difference. First operand 2140 states and 3097 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:19,228 INFO L93 Difference]: Finished difference Result 5573 states and 8064 transitions. [2021-12-14 15:23:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-14 15:23:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:19,241 INFO L225 Difference]: With dead ends: 5573 [2021-12-14 15:23:19,241 INFO L226 Difference]: Without dead ends: 3769 [2021-12-14 15:23:19,244 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 15:23:19,245 INFO L933 BasicCegarLoop]: 1116 mSDtfsCounter, 506 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:19,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1661 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-12-14 15:23:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3743. [2021-12-14 15:23:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3738 states have (on average 1.4285714285714286) internal successors, (5340), 3742 states have internal predecessors, (5340), 0 states have call successors, (0), 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 15:23:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5340 transitions. [2021-12-14 15:23:19,454 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5340 transitions. Word has length 152 [2021-12-14 15:23:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:19,455 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 5340 transitions. [2021-12-14 15:23:19,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5340 transitions. [2021-12-14 15:23:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-14 15:23:19,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:19,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:19,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:23:19,461 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash 471058402, now seen corresponding path program 1 times [2021-12-14 15:23:19,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216266063] [2021-12-14 15:23:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:19,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:19,605 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 15:23:19,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:19,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216266063] [2021-12-14 15:23:19,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216266063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:19,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:19,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:23:19,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025600708] [2021-12-14 15:23:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:19,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:23:19,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:23:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:19,609 INFO L87 Difference]: Start difference. First operand 3743 states and 5340 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:20,008 INFO L93 Difference]: Finished difference Result 10650 states and 15175 transitions. [2021-12-14 15:23:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-14 15:23:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:20,034 INFO L225 Difference]: With dead ends: 10650 [2021-12-14 15:23:20,034 INFO L226 Difference]: Without dead ends: 6944 [2021-12-14 15:23:20,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:20,040 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 1720 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:20,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 1524 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:23:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6944 states. [2021-12-14 15:23:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6944 to 6923. [2021-12-14 15:23:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 6918 states have (on average 1.413847932928592) internal successors, (9781), 6922 states have internal predecessors, (9781), 0 states have call successors, (0), 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 15:23:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9781 transitions. [2021-12-14 15:23:20,397 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9781 transitions. Word has length 152 [2021-12-14 15:23:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:20,398 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9781 transitions. [2021-12-14 15:23:20,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9781 transitions. [2021-12-14 15:23:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-14 15:23:20,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:20,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:23:20,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1318458360, now seen corresponding path program 1 times [2021-12-14 15:23:20,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:20,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083018133] [2021-12-14 15:23:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:20,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:20,528 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 15:23:20,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083018133] [2021-12-14 15:23:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083018133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:20,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086262322] [2021-12-14 15:23:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:20,530 INFO L87 Difference]: Start difference. First operand 6923 states and 9781 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:20,928 INFO L93 Difference]: Finished difference Result 14142 states and 19881 transitions. [2021-12-14 15:23:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-14 15:23:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:20,965 INFO L225 Difference]: With dead ends: 14142 [2021-12-14 15:23:20,965 INFO L226 Difference]: Without dead ends: 7336 [2021-12-14 15:23:20,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:20,976 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 1162 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:20,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 1540 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2021-12-14 15:23:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7151. [2021-12-14 15:23:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 7146 states have (on average 1.4045619927232018) internal successors, (10037), 7150 states have internal predecessors, (10037), 0 states have call successors, (0), 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 15:23:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 10037 transitions. [2021-12-14 15:23:21,355 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 10037 transitions. Word has length 152 [2021-12-14 15:23:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:21,355 INFO L470 AbstractCegarLoop]: Abstraction has 7151 states and 10037 transitions. [2021-12-14 15:23:21,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 15:23:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 10037 transitions. [2021-12-14 15:23:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-14 15:23:21,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:21,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:23:21,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:23:21,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:21,367 INFO L85 PathProgramCache]: Analyzing trace with hash -756425508, now seen corresponding path program 1 times [2021-12-14 15:23:21,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:21,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815999689] [2021-12-14 15:23:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:21,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:21,412 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 15:23:21,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815999689] [2021-12-14 15:23:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815999689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:21,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:21,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089625301] [2021-12-14 15:23:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:21,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:21,415 INFO L87 Difference]: Start difference. First operand 7151 states and 10037 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 15:23:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:21,895 INFO L93 Difference]: Finished difference Result 20719 states and 29169 transitions. [2021-12-14 15:23:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-14 15:23:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:21,928 INFO L225 Difference]: With dead ends: 20719 [2021-12-14 15:23:21,928 INFO L226 Difference]: Without dead ends: 14177 [2021-12-14 15:23:21,942 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 15:23:21,944 INFO L933 BasicCegarLoop]: 1140 mSDtfsCounter, 552 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:21,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 1722 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14177 states. [2021-12-14 15:23:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14177 to 7167. [2021-12-14 15:23:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7162 states have (on average 1.4036581960346273) internal successors, (10053), 7166 states have internal predecessors, (10053), 0 states have call successors, (0), 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 15:23:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 10053 transitions. [2021-12-14 15:23:22,358 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 10053 transitions. Word has length 153 [2021-12-14 15:23:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:22,358 INFO L470 AbstractCegarLoop]: Abstraction has 7167 states and 10053 transitions. [2021-12-14 15:23:22,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 15:23:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 10053 transitions. [2021-12-14 15:23:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-14 15:23:22,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:22,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:22,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:23:22,390 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1459255993, now seen corresponding path program 1 times [2021-12-14 15:23:22,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:22,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723990315] [2021-12-14 15:23:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:22,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:22,523 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 15:23:22,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:22,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723990315] [2021-12-14 15:23:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723990315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:22,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:22,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:23:22,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134130744] [2021-12-14 15:23:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:22,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:23:22,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:23:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:22,527 INFO L87 Difference]: Start difference. First operand 7167 states and 10053 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 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 15:23:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:23,217 INFO L93 Difference]: Finished difference Result 20866 states and 29140 transitions. [2021-12-14 15:23:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2021-12-14 15:23:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:23,246 INFO L225 Difference]: With dead ends: 20866 [2021-12-14 15:23:23,246 INFO L226 Difference]: Without dead ends: 13816 [2021-12-14 15:23:23,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:23,261 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1744 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:23,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 1542 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:23:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13816 states. [2021-12-14 15:23:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13816 to 13786. [2021-12-14 15:23:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 13781 states have (on average 1.3821928742471519) internal successors, (19048), 13785 states have internal predecessors, (19048), 0 states have call successors, (0), 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 15:23:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 19048 transitions. [2021-12-14 15:23:23,896 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 19048 transitions. Word has length 154 [2021-12-14 15:23:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:23,897 INFO L470 AbstractCegarLoop]: Abstraction has 13786 states and 19048 transitions. [2021-12-14 15:23:23,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 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 15:23:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 19048 transitions. [2021-12-14 15:23:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-14 15:23:23,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:23,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:23,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:23:23,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2098194761, now seen corresponding path program 1 times [2021-12-14 15:23:23,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:23,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287120537] [2021-12-14 15:23:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:23,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:24,002 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 15:23:24,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287120537] [2021-12-14 15:23:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287120537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:24,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:24,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146713487] [2021-12-14 15:23:24,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:24,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:24,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:24,005 INFO L87 Difference]: Start difference. First operand 13786 states and 19048 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 15:23:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:24,442 INFO L93 Difference]: Finished difference Result 24262 states and 33508 transitions. [2021-12-14 15:23:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2021-12-14 15:23:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:24,465 INFO L225 Difference]: With dead ends: 24262 [2021-12-14 15:23:24,465 INFO L226 Difference]: Without dead ends: 10567 [2021-12-14 15:23:24,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:24,484 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 65 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:24,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1804 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-12-14 15:23:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 10567. [2021-12-14 15:23:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10567 states, 10562 states have (on average 1.3801363378148077) internal successors, (14577), 10566 states have internal predecessors, (14577), 0 states have call successors, (0), 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 15:23:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10567 states to 10567 states and 14577 transitions. [2021-12-14 15:23:25,032 INFO L78 Accepts]: Start accepts. Automaton has 10567 states and 14577 transitions. Word has length 154 [2021-12-14 15:23:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 10567 states and 14577 transitions. [2021-12-14 15:23:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 15:23:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10567 states and 14577 transitions. [2021-12-14 15:23:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 15:23:25,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:25,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:23:25,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2135177219, now seen corresponding path program 1 times [2021-12-14 15:23:25,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:25,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206020746] [2021-12-14 15:23:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:25,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:25,087 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 15:23:25,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206020746] [2021-12-14 15:23:25,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206020746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:25,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:25,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:25,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809184152] [2021-12-14 15:23:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:25,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:25,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:25,090 INFO L87 Difference]: Start difference. First operand 10567 states and 14577 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:25,778 INFO L93 Difference]: Finished difference Result 24469 states and 34596 transitions. [2021-12-14 15:23:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:25,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-14 15:23:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:25,814 INFO L225 Difference]: With dead ends: 24469 [2021-12-14 15:23:25,814 INFO L226 Difference]: Without dead ends: 15072 [2021-12-14 15:23:25,829 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 15:23:25,830 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 307 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:25,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1240 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15072 states. [2021-12-14 15:23:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15072 to 13229. [2021-12-14 15:23:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13224 states have (on average 1.4232456140350878) internal successors, (18821), 13228 states have internal predecessors, (18821), 0 states have call successors, (0), 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 15:23:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 18821 transitions. [2021-12-14 15:23:26,658 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 18821 transitions. Word has length 156 [2021-12-14 15:23:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 13229 states and 18821 transitions. [2021-12-14 15:23:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 18821 transitions. [2021-12-14 15:23:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-14 15:23:26,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:26,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:26,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:23:26,672 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 787037030, now seen corresponding path program 1 times [2021-12-14 15:23:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:26,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562920220] [2021-12-14 15:23:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:26,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:26,730 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 15:23:26,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562920220] [2021-12-14 15:23:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562920220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:26,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:26,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:26,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736763048] [2021-12-14 15:23:26,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:26,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:26,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:26,734 INFO L87 Difference]: Start difference. First operand 13229 states and 18821 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:27,411 INFO L93 Difference]: Finished difference Result 28929 states and 42160 transitions. [2021-12-14 15:23:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-12-14 15:23:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:27,460 INFO L225 Difference]: With dead ends: 28929 [2021-12-14 15:23:27,460 INFO L226 Difference]: Without dead ends: 18979 [2021-12-14 15:23:27,480 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 15:23:27,481 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 336 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:27,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1238 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2021-12-14 15:23:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 17341. [2021-12-14 15:23:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17341 states, 17336 states have (on average 1.4595639132441163) internal successors, (25303), 17340 states have internal predecessors, (25303), 0 states have call successors, (0), 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 15:23:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17341 states to 17341 states and 25303 transitions. [2021-12-14 15:23:28,261 INFO L78 Accepts]: Start accepts. Automaton has 17341 states and 25303 transitions. Word has length 158 [2021-12-14 15:23:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 17341 states and 25303 transitions. [2021-12-14 15:23:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 17341 states and 25303 transitions. [2021-12-14 15:23:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 15:23:28,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:28,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:28,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:23:28,278 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1606523445, now seen corresponding path program 1 times [2021-12-14 15:23:28,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553234425] [2021-12-14 15:23:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:28,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:28,387 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 15:23:28,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553234425] [2021-12-14 15:23:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553234425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:28,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458999576] [2021-12-14 15:23:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:28,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:28,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:28,390 INFO L87 Difference]: Start difference. First operand 17341 states and 25303 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:29,553 INFO L93 Difference]: Finished difference Result 45048 states and 65700 transitions. [2021-12-14 15:23:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-14 15:23:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:29,617 INFO L225 Difference]: With dead ends: 45048 [2021-12-14 15:23:29,617 INFO L226 Difference]: Without dead ends: 28052 [2021-12-14 15:23:29,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:29,644 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 1152 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:29,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1517 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28052 states. [2021-12-14 15:23:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28052 to 28028. [2021-12-14 15:23:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28023 states have (on average 1.4390322235306712) internal successors, (40326), 28027 states have internal predecessors, (40326), 0 states have call successors, (0), 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 15:23:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 40326 transitions. [2021-12-14 15:23:31,073 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 40326 transitions. Word has length 159 [2021-12-14 15:23:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:31,074 INFO L470 AbstractCegarLoop]: Abstraction has 28028 states and 40326 transitions. [2021-12-14 15:23:31,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 40326 transitions. [2021-12-14 15:23:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:23:31,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:31,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:31,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:23:31,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash 883442860, now seen corresponding path program 1 times [2021-12-14 15:23:31,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:31,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903950765] [2021-12-14 15:23:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:31,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:31,205 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 15:23:31,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:31,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903950765] [2021-12-14 15:23:31,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903950765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:31,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:31,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:31,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055997964] [2021-12-14 15:23:31,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:31,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:31,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:31,208 INFO L87 Difference]: Start difference. First operand 28028 states and 40326 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:32,321 INFO L93 Difference]: Finished difference Result 44477 states and 64087 transitions. [2021-12-14 15:23:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-14 15:23:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:32,356 INFO L225 Difference]: With dead ends: 44477 [2021-12-14 15:23:32,356 INFO L226 Difference]: Without dead ends: 22873 [2021-12-14 15:23:32,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:23:32,378 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 53 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:32,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1775 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:23:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22873 states. [2021-12-14 15:23:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22873 to 22873. [2021-12-14 15:23:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22873 states, 22868 states have (on average 1.4361553262200455) internal successors, (32842), 22872 states have internal predecessors, (32842), 0 states have call successors, (0), 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 15:23:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22873 states to 22873 states and 32842 transitions. [2021-12-14 15:23:33,257 INFO L78 Accepts]: Start accepts. Automaton has 22873 states and 32842 transitions. Word has length 161 [2021-12-14 15:23:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:33,258 INFO L470 AbstractCegarLoop]: Abstraction has 22873 states and 32842 transitions. [2021-12-14 15:23:33,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 22873 states and 32842 transitions. [2021-12-14 15:23:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 15:23:33,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:33,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:33,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:23:33,274 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -424216235, now seen corresponding path program 1 times [2021-12-14 15:23:33,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176275398] [2021-12-14 15:23:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:33,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:33,321 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 15:23:33,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:33,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176275398] [2021-12-14 15:23:33,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176275398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:33,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:33,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:23:33,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545592329] [2021-12-14 15:23:33,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:33,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:23:33,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:23:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:33,324 INFO L87 Difference]: Start difference. First operand 22873 states and 32842 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:34,614 INFO L93 Difference]: Finished difference Result 52067 states and 76255 transitions. [2021-12-14 15:23:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:23:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-14 15:23:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:34,663 INFO L225 Difference]: With dead ends: 52067 [2021-12-14 15:23:34,663 INFO L226 Difference]: Without dead ends: 34271 [2021-12-14 15:23:34,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:23:34,693 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 303 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:34,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 1219 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:23:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34271 states. [2021-12-14 15:23:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34271 to 31753. [2021-12-14 15:23:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31753 states, 31748 states have (on average 1.4697618747637646) internal successors, (46662), 31752 states have internal predecessors, (46662), 0 states have call successors, (0), 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 15:23:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31753 states to 31753 states and 46662 transitions. [2021-12-14 15:23:36,151 INFO L78 Accepts]: Start accepts. Automaton has 31753 states and 46662 transitions. Word has length 165 [2021-12-14 15:23:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 31753 states and 46662 transitions. [2021-12-14 15:23:36,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31753 states and 46662 transitions. [2021-12-14 15:23:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-14 15:23:36,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:36,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:36,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:23:36,162 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1525395194, now seen corresponding path program 1 times [2021-12-14 15:23:36,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:36,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895245468] [2021-12-14 15:23:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:36,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:36,307 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 15:23:36,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:36,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895245468] [2021-12-14 15:23:36,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895245468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:36,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:36,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:23:36,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848452883] [2021-12-14 15:23:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:36,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 15:23:36,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 15:23:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:23:36,312 INFO L87 Difference]: Start difference. First operand 31753 states and 46662 transitions. Second operand has 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:43,933 INFO L93 Difference]: Finished difference Result 154377 states and 231123 transitions. [2021-12-14 15:23:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 15:23:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-14 15:23:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:44,173 INFO L225 Difference]: With dead ends: 154377 [2021-12-14 15:23:44,173 INFO L226 Difference]: Without dead ends: 126451 [2021-12-14 15:23:44,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-12-14 15:23:44,224 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 5919 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5919 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:44,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5919 Valid, 2710 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 15:23:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126451 states. [2021-12-14 15:23:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126451 to 85305. [2021-12-14 15:23:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85305 states, 85300 states have (on average 1.47989449003517) internal successors, (126235), 85304 states have internal predecessors, (126235), 0 states have call successors, (0), 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 15:23:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85305 states to 85305 states and 126235 transitions. [2021-12-14 15:23:49,959 INFO L78 Accepts]: Start accepts. Automaton has 85305 states and 126235 transitions. Word has length 166 [2021-12-14 15:23:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:23:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 85305 states and 126235 transitions. [2021-12-14 15:23:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 85305 states and 126235 transitions. [2021-12-14 15:23:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-14 15:23:49,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:23:49,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:23:49,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:23:49,977 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 15:23:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:23:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1116845734, now seen corresponding path program 1 times [2021-12-14 15:23:49,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:23:49,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555406287] [2021-12-14 15:23:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:23:49,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:23:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:23:50,081 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 15:23:50,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:23:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555406287] [2021-12-14 15:23:50,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555406287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:23:50,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:23:50,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:23:50,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34818884] [2021-12-14 15:23:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:23:50,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:23:50,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:23:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:23:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:50,083 INFO L87 Difference]: Start difference. First operand 85305 states and 126235 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:23:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:23:56,015 INFO L93 Difference]: Finished difference Result 172268 states and 261338 transitions. [2021-12-14 15:23:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:23:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-14 15:23:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:23:56,234 INFO L225 Difference]: With dead ends: 172268 [2021-12-14 15:23:56,234 INFO L226 Difference]: Without dead ends: 106417 [2021-12-14 15:23:56,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:23:56,306 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 1057 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:23:56,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1011 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:23:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106417 states.