./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa --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 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:18:06,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:18:06,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:18:06,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:18:06,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:18:06,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:18:06,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:18:06,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:18:06,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:18:06,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:18:06,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:18:06,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:18:06,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:18:06,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:18:06,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:18:06,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:18:06,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:18:06,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:18:06,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:18:06,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:18:06,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:18:06,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:18:06,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:18:06,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:18:06,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:18:06,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:18:06,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:18:06,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:18:06,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:18:06,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:18:06,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:18:06,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:18:06,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:18:06,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:18:06,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:18:06,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:18:06,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:18:06,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:18:06,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:18:06,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:18:06,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:18:06,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:18:06,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:18:06,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:18:06,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:18:06,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:18:06,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:18:06,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:18:06,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:18:06,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:18:06,971 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:18:06,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:18:06,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:18:06,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:18:06,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:18:06,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:18:06,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:18:06,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:18:06,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:18:06,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:18:06,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:18:06,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:18:06,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:18:06,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:18:06,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:18:06,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:18:06,976 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 [2021-12-06 19:18:07,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:18:07,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:18:07,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:18:07,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:18:07,182 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:18:07,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 19:18:07,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/data/14f550e2f/050534b87e8049fd81e9095b26bc29aa/FLAG1139502d6 [2021-12-06 19:18:07,668 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:18:07,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 19:18:07,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/data/14f550e2f/050534b87e8049fd81e9095b26bc29aa/FLAG1139502d6 [2021-12-06 19:18:07,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/data/14f550e2f/050534b87e8049fd81e9095b26bc29aa [2021-12-06 19:18:07,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:18:07,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:18:07,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:18:07,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:18:07,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:18:07,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:18:07" (1/1) ... [2021-12-06 19:18:07,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e62269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:07, skipping insertion in model container [2021-12-06 19:18:07,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:18:07" (1/1) ... [2021-12-06 19:18:07,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:18:07,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:18:07,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-12-06 19:18:07,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:18:07,997 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:18:08,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-12-06 19:18:08,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:18:08,102 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:18:08,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08 WrapperNode [2021-12-06 19:18:08,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:18:08,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:18:08,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:18:08,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:18:08,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,158 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1373 [2021-12-06 19:18:08,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:18:08,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:18:08,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:18:08,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:18:08,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:18:08,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:18:08,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:18:08,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:18:08,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (1/1) ... [2021-12-06 19:18:08,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:18:08,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:18:08,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:18:08,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b56da5-11ef-4d0e-89fb-96a39e07d1dc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:18:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:18:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:18:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:18:08,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:18:08,381 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:18:08,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:18:09,033 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:18:09,043 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:18:09,043 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 19:18:09,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:18:09 BoogieIcfgContainer [2021-12-06 19:18:09,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:18:09,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:18:09,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:18:09,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:18:09,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:18:07" (1/3) ... [2021-12-06 19:18:09,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7ebc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:18:09, skipping insertion in model container [2021-12-06 19:18:09,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:18:08" (2/3) ... [2021-12-06 19:18:09,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7ebc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:18:09, skipping insertion in model container [2021-12-06 19:18:09,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:18:09" (3/3) ... [2021-12-06 19:18:09,051 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 19:18:09,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:18:09,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:18:09,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:18:09,094 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 [2021-12-06 19:18:09,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:18:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 350 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 19:18:09,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:09,124 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] [2021-12-06 19:18:09,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash -799681112, now seen corresponding path program 1 times [2021-12-06 19:18:09,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569015001] [2021-12-06 19:18:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:09,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:09,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569015001] [2021-12-06 19:18:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569015001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:09,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:09,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:09,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111271751] [2021-12-06 19:18:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:09,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:09,545 INFO L87 Difference]: Start difference. First operand has 351 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 350 states have internal predecessors, (624), 0 states have call successors, (0), 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 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:09,700 INFO L93 Difference]: Finished difference Result 655 states and 1130 transitions. [2021-12-06 19:18:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-12-06 19:18:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:09,719 INFO L225 Difference]: With dead ends: 655 [2021-12-06 19:18:09,719 INFO L226 Difference]: Without dead ends: 491 [2021-12-06 19:18:09,722 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 [2021-12-06 19:18:09,725 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 268 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:09,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1150 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-06 19:18:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2021-12-06 19:18:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.6529774127310062) internal successors, (805), 487 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 805 transitions. [2021-12-06 19:18:09,794 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 805 transitions. Word has length 118 [2021-12-06 19:18:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 805 transitions. [2021-12-06 19:18:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 805 transitions. [2021-12-06 19:18:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 19:18:09,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:09,803 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] [2021-12-06 19:18:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:18:09,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 103897476, now seen corresponding path program 1 times [2021-12-06 19:18:09,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:09,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909254905] [2021-12-06 19:18:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:09,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:09,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909254905] [2021-12-06 19:18:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909254905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:09,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:09,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602273561] [2021-12-06 19:18:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:09,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:09,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:09,933 INFO L87 Difference]: Start difference. First operand 488 states and 805 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:09,983 INFO L93 Difference]: Finished difference Result 1058 states and 1753 transitions. [2021-12-06 19:18:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-06 19:18:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:09,988 INFO L225 Difference]: With dead ends: 1058 [2021-12-06 19:18:09,988 INFO L226 Difference]: Without dead ends: 763 [2021-12-06 19:18:09,990 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 [2021-12-06 19:18:09,991 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 231 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:09,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1100 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-12-06 19:18:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2021-12-06 19:18:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.654353562005277) internal successors, (1254), 758 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1254 transitions. [2021-12-06 19:18:10,029 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1254 transitions. Word has length 121 [2021-12-06 19:18:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:10,029 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1254 transitions. [2021-12-06 19:18:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1254 transitions. [2021-12-06 19:18:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 19:18:10,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:10,032 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] [2021-12-06 19:18:10,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:18:10,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash 397712831, now seen corresponding path program 1 times [2021-12-06 19:18:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:10,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572731869] [2021-12-06 19:18:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:10,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:10,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572731869] [2021-12-06 19:18:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572731869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:10,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:10,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844809] [2021-12-06 19:18:10,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:10,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:10,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:10,113 INFO L87 Difference]: Start difference. First operand 759 states and 1254 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:10,187 INFO L93 Difference]: Finished difference Result 1851 states and 3064 transitions. [2021-12-06 19:18:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-06 19:18:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:10,194 INFO L225 Difference]: With dead ends: 1851 [2021-12-06 19:18:10,195 INFO L226 Difference]: Without dead ends: 1285 [2021-12-06 19:18:10,196 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 [2021-12-06 19:18:10,198 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 224 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:10,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1101 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-12-06 19:18:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1279. [2021-12-06 19:18:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 1.6510172143974962) internal successors, (2110), 1278 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2110 transitions. [2021-12-06 19:18:10,247 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2110 transitions. Word has length 124 [2021-12-06 19:18:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:10,247 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 2110 transitions. [2021-12-06 19:18:10,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2110 transitions. [2021-12-06 19:18:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 19:18:10,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:10,250 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] [2021-12-06 19:18:10,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:18:10,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 431510401, now seen corresponding path program 1 times [2021-12-06 19:18:10,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:10,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790477038] [2021-12-06 19:18:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:10,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:10,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:10,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790477038] [2021-12-06 19:18:10,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790477038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:10,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:10,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:10,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529778857] [2021-12-06 19:18:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:10,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:10,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:10,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:10,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:10,338 INFO L87 Difference]: Start difference. First operand 1279 states and 2110 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:10,439 INFO L93 Difference]: Finished difference Result 3371 states and 5560 transitions. [2021-12-06 19:18:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-06 19:18:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:10,450 INFO L225 Difference]: With dead ends: 3371 [2021-12-06 19:18:10,451 INFO L226 Difference]: Without dead ends: 2285 [2021-12-06 19:18:10,453 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 [2021-12-06 19:18:10,454 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 216 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:10,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1099 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-12-06 19:18:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2275. [2021-12-06 19:18:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 1.6402814423922603) internal successors, (3730), 2274 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3730 transitions. [2021-12-06 19:18:10,542 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3730 transitions. Word has length 127 [2021-12-06 19:18:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:10,543 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 3730 transitions. [2021-12-06 19:18:10,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3730 transitions. [2021-12-06 19:18:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 19:18:10,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:10,545 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] [2021-12-06 19:18:10,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:18:10,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1348551006, now seen corresponding path program 1 times [2021-12-06 19:18:10,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:10,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795814122] [2021-12-06 19:18:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:10,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:10,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795814122] [2021-12-06 19:18:10,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795814122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:10,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:10,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:18:10,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942024502] [2021-12-06 19:18:10,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:10,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:18:10,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:18:10,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:18:10,618 INFO L87 Difference]: Start difference. First operand 2275 states and 3730 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:11,157 INFO L93 Difference]: Finished difference Result 11927 states and 19706 transitions. [2021-12-06 19:18:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:18:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-06 19:18:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:11,202 INFO L225 Difference]: With dead ends: 11927 [2021-12-06 19:18:11,202 INFO L226 Difference]: Without dead ends: 9845 [2021-12-06 19:18:11,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:18:11,207 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 2047 mSDsluCounter, 5076 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 5657 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:11,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 5657 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:18:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9845 states. [2021-12-06 19:18:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9845 to 4220. [2021-12-06 19:18:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4220 states, 4219 states have (on average 1.6401990993126334) internal successors, (6920), 4219 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4220 states to 4220 states and 6920 transitions. [2021-12-06 19:18:11,461 INFO L78 Accepts]: Start accepts. Automaton has 4220 states and 6920 transitions. Word has length 130 [2021-12-06 19:18:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 4220 states and 6920 transitions. [2021-12-06 19:18:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4220 states and 6920 transitions. [2021-12-06 19:18:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 19:18:11,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:11,465 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] [2021-12-06 19:18:11,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:18:11,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1077529784, now seen corresponding path program 1 times [2021-12-06 19:18:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369153694] [2021-12-06 19:18:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:11,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:11,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:11,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369153694] [2021-12-06 19:18:11,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369153694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:11,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:11,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:18:11,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626616623] [2021-12-06 19:18:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:11,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:18:11,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:18:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:18:11,532 INFO L87 Difference]: Start difference. First operand 4220 states and 6920 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:11,840 INFO L93 Difference]: Finished difference Result 12379 states and 20401 transitions. [2021-12-06 19:18:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:18:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-06 19:18:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:11,883 INFO L225 Difference]: With dead ends: 12379 [2021-12-06 19:18:11,883 INFO L226 Difference]: Without dead ends: 8352 [2021-12-06 19:18:11,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:18:11,889 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 758 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:11,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1913 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-12-06 19:18:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6269. [2021-12-06 19:18:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 1.6426292278238672) internal successors, (10296), 6268 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 10296 transitions. [2021-12-06 19:18:12,166 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 10296 transitions. Word has length 131 [2021-12-06 19:18:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:12,167 INFO L470 AbstractCegarLoop]: Abstraction has 6269 states and 10296 transitions. [2021-12-06 19:18:12,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 10296 transitions. [2021-12-06 19:18:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 19:18:12,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:12,170 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] [2021-12-06 19:18:12,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:18:12,170 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1018819031, now seen corresponding path program 1 times [2021-12-06 19:18:12,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:12,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734231565] [2021-12-06 19:18:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:12,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:12,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:12,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734231565] [2021-12-06 19:18:12,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734231565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:12,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:12,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:18:12,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995894816] [2021-12-06 19:18:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:12,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:18:12,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:18:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:18:12,245 INFO L87 Difference]: Start difference. First operand 6269 states and 10296 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:12,668 INFO L93 Difference]: Finished difference Result 18421 states and 30329 transitions. [2021-12-06 19:18:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:18:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-06 19:18:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:12,697 INFO L225 Difference]: With dead ends: 18421 [2021-12-06 19:18:12,697 INFO L226 Difference]: Without dead ends: 12345 [2021-12-06 19:18:12,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:18:12,705 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 758 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:12,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1902 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2021-12-06 19:18:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 9283. [2021-12-06 19:18:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 1.641025641025641) internal successors, (15232), 9282 states have internal predecessors, (15232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 15232 transitions. [2021-12-06 19:18:13,101 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 15232 transitions. Word has length 132 [2021-12-06 19:18:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:13,101 INFO L470 AbstractCegarLoop]: Abstraction has 9283 states and 15232 transitions. [2021-12-06 19:18:13,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 15232 transitions. [2021-12-06 19:18:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 19:18:13,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:13,106 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] [2021-12-06 19:18:13,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:18:13,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1576564833, now seen corresponding path program 1 times [2021-12-06 19:18:13,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:13,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405541763] [2021-12-06 19:18:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:13,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:13,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405541763] [2021-12-06 19:18:13,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405541763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:13,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:13,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:18:13,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501884179] [2021-12-06 19:18:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:13,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:18:13,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:13,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:18:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:18:13,169 INFO L87 Difference]: Start difference. First operand 9283 states and 15232 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:13,788 INFO L93 Difference]: Finished difference Result 27309 states and 44917 transitions. [2021-12-06 19:18:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:18:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-12-06 19:18:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:13,818 INFO L225 Difference]: With dead ends: 27309 [2021-12-06 19:18:13,818 INFO L226 Difference]: Without dead ends: 18219 [2021-12-06 19:18:13,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:18:13,830 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 756 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1831 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2021-12-06 19:18:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 13717. [2021-12-06 19:18:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 13716 states have (on average 1.6393992417614465) internal successors, (22486), 13716 states have internal predecessors, (22486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 22486 transitions. [2021-12-06 19:18:14,469 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 22486 transitions. Word has length 133 [2021-12-06 19:18:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:14,470 INFO L470 AbstractCegarLoop]: Abstraction has 13717 states and 22486 transitions. [2021-12-06 19:18:14,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 22486 transitions. [2021-12-06 19:18:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:18:14,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:14,475 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] [2021-12-06 19:18:14,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:18:14,476 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1092997201, now seen corresponding path program 1 times [2021-12-06 19:18:14,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115634675] [2021-12-06 19:18:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:14,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:14,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:14,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115634675] [2021-12-06 19:18:14,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115634675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:14,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:14,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:14,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222533122] [2021-12-06 19:18:14,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:14,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:14,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:14,527 INFO L87 Difference]: Start difference. First operand 13717 states and 22486 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:15,217 INFO L93 Difference]: Finished difference Result 30564 states and 50300 transitions. [2021-12-06 19:18:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-06 19:18:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:15,244 INFO L225 Difference]: With dead ends: 30564 [2021-12-06 19:18:15,244 INFO L226 Difference]: Without dead ends: 21069 [2021-12-06 19:18:15,254 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 [2021-12-06 19:18:15,255 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 237 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:15,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1295 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21069 states. [2021-12-06 19:18:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21069 to 21067. [2021-12-06 19:18:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21067 states, 21066 states have (on average 1.6386594512484571) internal successors, (34520), 21066 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21067 states to 21067 states and 34520 transitions. [2021-12-06 19:18:16,008 INFO L78 Accepts]: Start accepts. Automaton has 21067 states and 34520 transitions. Word has length 134 [2021-12-06 19:18:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 21067 states and 34520 transitions. [2021-12-06 19:18:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 21067 states and 34520 transitions. [2021-12-06 19:18:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:18:16,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:16,011 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] [2021-12-06 19:18:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:18:16,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1957895025, now seen corresponding path program 1 times [2021-12-06 19:18:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:16,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966600027] [2021-12-06 19:18:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:16,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:16,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966600027] [2021-12-06 19:18:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966600027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:16,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632127502] [2021-12-06 19:18:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:16,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:16,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:16,074 INFO L87 Difference]: Start difference. First operand 21067 states and 34520 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:17,260 INFO L93 Difference]: Finished difference Result 46560 states and 76368 transitions. [2021-12-06 19:18:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-06 19:18:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:17,304 INFO L225 Difference]: With dead ends: 46560 [2021-12-06 19:18:17,304 INFO L226 Difference]: Without dead ends: 32027 [2021-12-06 19:18:17,324 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 [2021-12-06 19:18:17,325 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 230 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:17,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 1270 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32027 states. [2021-12-06 19:18:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32027 to 32025. [2021-12-06 19:18:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32025 states, 32024 states have (on average 1.6338058955783163) internal successors, (52321), 32024 states have internal predecessors, (52321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32025 states to 32025 states and 52321 transitions. [2021-12-06 19:18:18,504 INFO L78 Accepts]: Start accepts. Automaton has 32025 states and 52321 transitions. Word has length 134 [2021-12-06 19:18:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 32025 states and 52321 transitions. [2021-12-06 19:18:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32025 states and 52321 transitions. [2021-12-06 19:18:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:18:18,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:18,506 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] [2021-12-06 19:18:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:18:18,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1682257488, now seen corresponding path program 1 times [2021-12-06 19:18:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235468978] [2021-12-06 19:18:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:18,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:18,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235468978] [2021-12-06 19:18:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235468978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:18,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:18,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:18:18,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999795807] [2021-12-06 19:18:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:18,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:18:18,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:18,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:18:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:18:18,556 INFO L87 Difference]: Start difference. First operand 32025 states and 52321 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:20,580 INFO L93 Difference]: Finished difference Result 95013 states and 155765 transitions. [2021-12-06 19:18:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:18:20,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-06 19:18:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:20,671 INFO L225 Difference]: With dead ends: 95013 [2021-12-06 19:18:20,672 INFO L226 Difference]: Without dead ends: 63205 [2021-12-06 19:18:20,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:18:20,707 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 754 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:20,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1911 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63205 states. [2021-12-06 19:18:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63205 to 47481. [2021-12-06 19:18:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47481 states, 47480 states have (on average 1.6328559393428812) internal successors, (77528), 47480 states have internal predecessors, (77528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47481 states to 47481 states and 77528 transitions. [2021-12-06 19:18:23,005 INFO L78 Accepts]: Start accepts. Automaton has 47481 states and 77528 transitions. Word has length 134 [2021-12-06 19:18:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 47481 states and 77528 transitions. [2021-12-06 19:18:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47481 states and 77528 transitions. [2021-12-06 19:18:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:18:23,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:23,007 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] [2021-12-06 19:18:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:18:23,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2036277819, now seen corresponding path program 1 times [2021-12-06 19:18:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198542158] [2021-12-06 19:18:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:23,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:23,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198542158] [2021-12-06 19:18:23,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198542158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:23,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:23,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:23,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391909313] [2021-12-06 19:18:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:23,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:23,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:23,055 INFO L87 Difference]: Start difference. First operand 47481 states and 77528 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:25,554 INFO L93 Difference]: Finished difference Result 104868 states and 171378 transitions. [2021-12-06 19:18:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-06 19:18:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:25,658 INFO L225 Difference]: With dead ends: 104868 [2021-12-06 19:18:25,658 INFO L226 Difference]: Without dead ends: 71739 [2021-12-06 19:18:25,690 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 [2021-12-06 19:18:25,691 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 223 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:25,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1237 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71739 states. [2021-12-06 19:18:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71739 to 71737. [2021-12-06 19:18:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71737 states, 71736 states have (on average 1.6268540202966433) internal successors, (116704), 71736 states have internal predecessors, (116704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71737 states to 71737 states and 116704 transitions. [2021-12-06 19:18:28,708 INFO L78 Accepts]: Start accepts. Automaton has 71737 states and 116704 transitions. Word has length 134 [2021-12-06 19:18:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:28,709 INFO L470 AbstractCegarLoop]: Abstraction has 71737 states and 116704 transitions. [2021-12-06 19:18:28,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 71737 states and 116704 transitions. [2021-12-06 19:18:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 19:18:28,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:28,710 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] [2021-12-06 19:18:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:18:28,710 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1806122865, now seen corresponding path program 1 times [2021-12-06 19:18:28,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:28,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655674203] [2021-12-06 19:18:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:28,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:28,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:28,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655674203] [2021-12-06 19:18:28,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655674203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:28,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:28,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:18:28,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841151749] [2021-12-06 19:18:28,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:28,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:18:28,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:18:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:18:28,760 INFO L87 Difference]: Start difference. First operand 71737 states and 116704 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:33,013 INFO L93 Difference]: Finished difference Result 156755 states and 255331 transitions. [2021-12-06 19:18:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:18:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-06 19:18:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:33,195 INFO L225 Difference]: With dead ends: 156755 [2021-12-06 19:18:33,195 INFO L226 Difference]: Without dead ends: 106563 [2021-12-06 19:18:33,237 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 [2021-12-06 19:18:33,237 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 214 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:33,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1202 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:18:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106563 states. [2021-12-06 19:18:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106563 to 106561. [2021-12-06 19:18:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106561 states, 106560 states have (on average 1.6191629129129128) internal successors, (172538), 106560 states have internal predecessors, (172538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106561 states to 106561 states and 172538 transitions. [2021-12-06 19:18:37,751 INFO L78 Accepts]: Start accepts. Automaton has 106561 states and 172538 transitions. Word has length 135 [2021-12-06 19:18:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:37,751 INFO L470 AbstractCegarLoop]: Abstraction has 106561 states and 172538 transitions. [2021-12-06 19:18:37,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 106561 states and 172538 transitions. [2021-12-06 19:18:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 19:18:37,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:37,752 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] [2021-12-06 19:18:37,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:18:37,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1035920417, now seen corresponding path program 1 times [2021-12-06 19:18:37,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:37,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613164577] [2021-12-06 19:18:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:37,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:37,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613164577] [2021-12-06 19:18:37,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613164577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:37,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:37,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:18:37,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355342262] [2021-12-06 19:18:37,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:37,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:18:37,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:37,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:18:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:18:37,893 INFO L87 Difference]: Start difference. First operand 106561 states and 172538 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:42,778 INFO L93 Difference]: Finished difference Result 212863 states and 344660 transitions. [2021-12-06 19:18:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:18:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-06 19:18:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:42,961 INFO L225 Difference]: With dead ends: 212863 [2021-12-06 19:18:42,961 INFO L226 Difference]: Without dead ends: 106563 [2021-12-06 19:18:43,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:18:43,042 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 369 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:43,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 2720 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:18:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106563 states. [2021-12-06 19:18:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106563 to 106561. [2021-12-06 19:18:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106561 states, 106560 states have (on average 1.6132976726726727) internal successors, (171913), 106560 states have internal predecessors, (171913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106561 states to 106561 states and 171913 transitions. [2021-12-06 19:18:47,749 INFO L78 Accepts]: Start accepts. Automaton has 106561 states and 171913 transitions. Word has length 136 [2021-12-06 19:18:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 106561 states and 171913 transitions. [2021-12-06 19:18:47,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 106561 states and 171913 transitions. [2021-12-06 19:18:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 19:18:47,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:47,751 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] [2021-12-06 19:18:47,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:18:47,751 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash -283207695, now seen corresponding path program 1 times [2021-12-06 19:18:47,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:18:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2634461] [2021-12-06 19:18:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:47,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:18:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:18:47,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:18:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2634461] [2021-12-06 19:18:47,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2634461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:47,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:47,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:18:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557397395] [2021-12-06 19:18:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:47,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:18:47,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:18:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:18:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:18:47,870 INFO L87 Difference]: Start difference. First operand 106561 states and 171913 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:56,739 INFO L93 Difference]: Finished difference Result 311503 states and 503008 transitions. [2021-12-06 19:18:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:18:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-12-06 19:18:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:57,112 INFO L225 Difference]: With dead ends: 311503 [2021-12-06 19:18:57,112 INFO L226 Difference]: Without dead ends: 205203 [2021-12-06 19:18:57,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:18:57,174 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 798 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:57,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2191 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:18:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205203 states. [2021-12-06 19:19:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205203 to 205201. [2021-12-06 19:19:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205201 states, 205200 states have (on average 1.6057212475633529) internal successors, (329494), 205200 states have internal predecessors, (329494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:19:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205201 states to 205201 states and 329494 transitions. [2021-12-06 19:19:06,722 INFO L78 Accepts]: Start accepts. Automaton has 205201 states and 329494 transitions. Word has length 139 [2021-12-06 19:19:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:19:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 205201 states and 329494 transitions. [2021-12-06 19:19:06,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:19:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 205201 states and 329494 transitions. [2021-12-06 19:19:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 19:19:06,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:19:06,723 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] [2021-12-06 19:19:06,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:19:06,724 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:19:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:19:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -191413026, now seen corresponding path program 1 times [2021-12-06 19:19:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:19:06,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920392850] [2021-12-06 19:19:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:19:06,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:19:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:19:06,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:19:06,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920392850] [2021-12-06 19:19:06,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920392850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:19:06,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:19:06,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:19:06,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656711820] [2021-12-06 19:19:06,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:19:06,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:19:06,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:19:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:19:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:19:06,841 INFO L87 Difference]: Start difference. First operand 205201 states and 329494 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:19:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:19:23,804 INFO L93 Difference]: Finished difference Result 389160 states and 623039 transitions. [2021-12-06 19:19:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:19:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 19:19:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:19:24,538 INFO L225 Difference]: With dead ends: 389160 [2021-12-06 19:19:24,538 INFO L226 Difference]: Without dead ends: 389158 [2021-12-06 19:19:24,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:19:24,610 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 490 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:19:24,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 2594 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:19:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389158 states. [2021-12-06 19:19:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389158 to 209073. [2021-12-06 19:19:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209073 states, 209072 states have (on average 1.5943741868829877) internal successors, (333339), 209072 states have internal predecessors, (333339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:19:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209073 states to 209073 states and 333339 transitions. [2021-12-06 19:19:37,588 INFO L78 Accepts]: Start accepts. Automaton has 209073 states and 333339 transitions. Word has length 140 [2021-12-06 19:19:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:19:37,589 INFO L470 AbstractCegarLoop]: Abstraction has 209073 states and 333339 transitions. [2021-12-06 19:19:37,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:19:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 209073 states and 333339 transitions. [2021-12-06 19:19:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 19:19:37,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:19:37,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:19:37,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:19:37,593 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:19:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:19:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2018193287, now seen corresponding path program 1 times [2021-12-06 19:19:37,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:19:37,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115518191] [2021-12-06 19:19:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:19:37,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:19:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:19:37,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:19:37,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115518191] [2021-12-06 19:19:37,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115518191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:19:37,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:19:37,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:19:37,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150621788] [2021-12-06 19:19:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:19:37,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:19:37,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:19:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:19:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:19:37,664 INFO L87 Difference]: Start difference. First operand 209073 states and 333339 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:20:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:02,995 INFO L93 Difference]: Finished difference Result 570403 states and 912112 transitions. [2021-12-06 19:20:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:20:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 176 [2021-12-06 19:20:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:04,115 INFO L225 Difference]: With dead ends: 570403 [2021-12-06 19:20:04,115 INFO L226 Difference]: Without dead ends: 477401 [2021-12-06 19:20:04,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:20:04,247 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 1534 mSDsluCounter, 2565 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:04,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 3387 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:20:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477401 states. [2021-12-06 19:20:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477401 to 336137. [2021-12-06 19:20:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336137 states, 336136 states have (on average 1.5929058476331008) internal successors, (535433), 336136 states have internal predecessors, (535433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:20:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336137 states to 336137 states and 535433 transitions. [2021-12-06 19:20:25,654 INFO L78 Accepts]: Start accepts. Automaton has 336137 states and 535433 transitions. Word has length 176 [2021-12-06 19:20:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:25,655 INFO L470 AbstractCegarLoop]: Abstraction has 336137 states and 535433 transitions. [2021-12-06 19:20:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:20:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 336137 states and 535433 transitions. [2021-12-06 19:20:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 19:20:25,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:25,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:25,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:20:25,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1153295463, now seen corresponding path program 1 times [2021-12-06 19:20:25,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:25,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212321000] [2021-12-06 19:20:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:25,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:20:25,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:25,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212321000] [2021-12-06 19:20:25,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212321000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:20:25,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:20:25,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:20:25,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438405060] [2021-12-06 19:20:25,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:20:25,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:20:25,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:20:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:20:25,726 INFO L87 Difference]: Start difference. First operand 336137 states and 535433 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:20:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:57,444 INFO L93 Difference]: Finished difference Result 641805 states and 1026412 transitions. [2021-12-06 19:20:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:20:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 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 176 [2021-12-06 19:20:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:58,552 INFO L225 Difference]: With dead ends: 641805 [2021-12-06 19:20:58,552 INFO L226 Difference]: Without dead ends: 549953 [2021-12-06 19:20:58,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:20:58,850 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 1520 mSDsluCounter, 2784 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:58,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3610 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:20:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549953 states. [2021-12-06 19:21:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549953 to 454453. [2021-12-06 19:21:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454453 states, 454452 states have (on average 1.5941727619198507) internal successors, (724475), 454452 states have internal predecessors, (724475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:21:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454453 states to 454453 states and 724475 transitions. [2021-12-06 19:21:29,623 INFO L78 Accepts]: Start accepts. Automaton has 454453 states and 724475 transitions. Word has length 176 [2021-12-06 19:21:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:29,624 INFO L470 AbstractCegarLoop]: Abstraction has 454453 states and 724475 transitions. [2021-12-06 19:21:29,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:21:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 454453 states and 724475 transitions. [2021-12-06 19:21:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 19:21:29,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:29,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:29,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:21:29,629 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash 852501011, now seen corresponding path program 1 times [2021-12-06 19:21:29,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104879242] [2021-12-06 19:21:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:29,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 19:21:29,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104879242] [2021-12-06 19:21:29,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104879242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:21:29,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:21:29,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:21:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086287229] [2021-12-06 19:21:29,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:21:29,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:21:29,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:21:29,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:21:29,697 INFO L87 Difference]: Start difference. First operand 454453 states and 724475 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 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) [2021-12-06 19:22:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:06,439 INFO L93 Difference]: Finished difference Result 700181 states and 1119976 transitions. [2021-12-06 19:22:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:22:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 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 176 [2021-12-06 19:22:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:07,701 INFO L225 Difference]: With dead ends: 700181 [2021-12-06 19:22:07,701 INFO L226 Difference]: Without dead ends: 608329 [2021-12-06 19:22:07,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:22:07,875 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1621 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:07,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 3299 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:22:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608329 states. [2021-12-06 19:22:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608329 to 526269. [2021-12-06 19:22:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526269 states, 526268 states have (on average 1.595322155251697) internal successors, (839567), 526268 states have internal predecessors, (839567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:22:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526269 states to 526269 states and 839567 transitions. [2021-12-06 19:22:44,584 INFO L78 Accepts]: Start accepts. Automaton has 526269 states and 839567 transitions. Word has length 176 [2021-12-06 19:22:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:44,584 INFO L470 AbstractCegarLoop]: Abstraction has 526269 states and 839567 transitions. [2021-12-06 19:22:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 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) [2021-12-06 19:22:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 526269 states and 839567 transitions. [2021-12-06 19:22:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 19:22:44,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:44,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:44,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:22:44,589 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1927579533, now seen corresponding path program 1 times [2021-12-06 19:22:44,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398370247] [2021-12-06 19:22:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:44,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:22:44,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398370247] [2021-12-06 19:22:44,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398370247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:22:44,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:22:44,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:22:44,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669310479] [2021-12-06 19:22:44,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:22:44,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:22:44,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:22:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:22:44,641 INFO L87 Difference]: Start difference. First operand 526269 states and 839567 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:23:27,556 INFO L93 Difference]: Finished difference Result 848026 states and 1356858 transitions. [2021-12-06 19:23:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:23:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 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 177 [2021-12-06 19:23:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:23:28,913 INFO L225 Difference]: With dead ends: 848026 [2021-12-06 19:23:28,913 INFO L226 Difference]: Without dead ends: 682472 [2021-12-06 19:23:29,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:23:29,220 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 451 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:23:29,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 1626 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:23:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682472 states. [2021-12-06 19:24:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682472 to 636796. [2021-12-06 19:24:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636796 states, 636795 states have (on average 1.5952245228056126) internal successors, (1015831), 636795 states have internal predecessors, (1015831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636796 states to 636796 states and 1015831 transitions. [2021-12-06 19:24:15,031 INFO L78 Accepts]: Start accepts. Automaton has 636796 states and 1015831 transitions. Word has length 177 [2021-12-06 19:24:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:15,031 INFO L470 AbstractCegarLoop]: Abstraction has 636796 states and 1015831 transitions. [2021-12-06 19:24:15,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 636796 states and 1015831 transitions. [2021-12-06 19:24:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 19:24:15,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:15,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:15,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:24:15,036 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:15,037 INFO L85 PathProgramCache]: Analyzing trace with hash 753171059, now seen corresponding path program 1 times [2021-12-06 19:24:15,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:15,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426153796] [2021-12-06 19:24:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:15,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:24:15,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:15,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426153796] [2021-12-06 19:24:15,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426153796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:15,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:15,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:24:15,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041073204] [2021-12-06 19:24:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:15,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:15,105 INFO L87 Difference]: Start difference. First operand 636796 states and 1015831 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:23,744 INFO L93 Difference]: Finished difference Result 1358640 states and 2171944 transitions. [2021-12-06 19:25:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 177 [2021-12-06 19:25:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:26,228 INFO L225 Difference]: With dead ends: 1358640 [2021-12-06 19:25:26,228 INFO L226 Difference]: Without dead ends: 1072826 [2021-12-06 19:25:26,788 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 [2021-12-06 19:25:26,788 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 207 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:26,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1092 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:25:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072826 states. [2021-12-06 19:26:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072826 to 1071336. [2021-12-06 19:26:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071336 states, 1071335 states have (on average 1.595552278232299) internal successors, (1709371), 1071335 states have internal predecessors, (1709371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071336 states to 1071336 states and 1709371 transitions. [2021-12-06 19:26:42,504 INFO L78 Accepts]: Start accepts. Automaton has 1071336 states and 1709371 transitions. Word has length 177 [2021-12-06 19:26:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:42,504 INFO L470 AbstractCegarLoop]: Abstraction has 1071336 states and 1709371 transitions. [2021-12-06 19:26:42,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1071336 states and 1709371 transitions. [2021-12-06 19:26:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 19:26:42,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:42,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:42,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:26:42,511 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -531219815, now seen corresponding path program 1 times [2021-12-06 19:26:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096528526] [2021-12-06 19:26:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:42,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 19:26:42,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:42,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096528526] [2021-12-06 19:26:42,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096528526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:26:42,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:26:42,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:26:42,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165385166] [2021-12-06 19:26:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:42,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:26:42,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:26:42,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:26:42,570 INFO L87 Difference]: Start difference. First operand 1071336 states and 1709371 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:09,454 INFO L93 Difference]: Finished difference Result 1476043 states and 2360939 transitions. [2021-12-06 19:28:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:28:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-06 19:28:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:12,478 INFO L225 Difference]: With dead ends: 1476043 [2021-12-06 19:28:12,478 INFO L226 Difference]: Without dead ends: 1310611 [2021-12-06 19:28:12,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:28:12,866 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 1531 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 3639 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:12,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 3639 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:28:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310611 states.