./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.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_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/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_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/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_3541c1f0-3d99-4433-be82-ce4368f273a8/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 f3efee8c660a339e6d13fe6728631748153baced66b17ec0d4ea728c6f50decb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:09:58,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:09:58,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:09:58,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:09:58,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:09:58,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:09:58,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:09:58,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:09:58,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:09:58,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:09:58,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:09:58,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:09:58,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:09:58,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:09:58,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:09:58,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:09:58,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:09:58,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:09:58,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:09:58,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:09:58,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:09:58,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:09:58,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:09:58,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:09:58,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:09:58,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:09:58,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:09:58,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:09:58,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:09:58,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:09:58,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:09:58,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:09:58,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:09:58,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:09:58,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:09:58,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:09:58,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:09:58,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:09:58,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:09:58,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:09:58,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:09:58,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:09:58,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:09:58,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:09:58,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:09:58,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:09:58,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:09:58,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:09:58,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:09:58,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:09:58,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:09:58,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:09:58,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:09:58,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:09:58,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:09:58,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:09:58,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:09:58,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:09:58,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:09:58,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:09:58,984 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_3541c1f0-3d99-4433-be82-ce4368f273a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3efee8c660a339e6d13fe6728631748153baced66b17ec0d4ea728c6f50decb [2021-12-07 00:09:59,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:09:59,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:09:59,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:09:59,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:09:59,179 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:09:59,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-07 00:09:59,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/data/0e586e991/69993ffa264b458cbc1a38e5bd6d72b0/FLAGe0c98c95f [2021-12-07 00:09:59,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:09:59,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-07 00:09:59,794 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/data/0e586e991/69993ffa264b458cbc1a38e5bd6d72b0/FLAGe0c98c95f [2021-12-07 00:10:00,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/data/0e586e991/69993ffa264b458cbc1a38e5bd6d72b0 [2021-12-07 00:10:00,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:10:00,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:10:00,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:10:00,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:10:00,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:10:00,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:10:00" (1/1) ... [2021-12-07 00:10:00,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2bf06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:00, skipping insertion in model container [2021-12-07 00:10:00,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:10:00" (1/1) ... [2021-12-07 00:10:00,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:10:00,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:10:00,684 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_3541c1f0-3d99-4433-be82-ce4368f273a8/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c[6487,6500] [2021-12-07 00:10:00,743 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_3541c1f0-3d99-4433-be82-ce4368f273a8/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c[14235,14248] [2021-12-07 00:10:01,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:10:01,275 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:10:01,293 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_3541c1f0-3d99-4433-be82-ce4368f273a8/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c[6487,6500] [2021-12-07 00:10:01,304 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_3541c1f0-3d99-4433-be82-ce4368f273a8/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c[14235,14248] [2021-12-07 00:10:01,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:10:01,688 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:10:01,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01 WrapperNode [2021-12-07 00:10:01,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:10:01,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:10:01,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:10:01,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:10:01,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:01,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:01,915 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4977 [2021-12-07 00:10:01,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:10:01,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:10:01,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:10:01,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:10:01,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:01,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:01,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:01,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:02,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:02,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:02,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:02,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:10:02,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:10:02,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:10:02,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:10:02,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (1/1) ... [2021-12-07 00:10:02,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:10:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:02,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:10:02,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:10:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:10:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:10:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:10:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:10:02,378 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:10:02,379 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:10:04,993 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:10:05,007 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:10:05,007 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:10:05,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:10:05 BoogieIcfgContainer [2021-12-07 00:10:05,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:10:05,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:10:05,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:10:05,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:10:05,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:10:00" (1/3) ... [2021-12-07 00:10:05,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee01af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:10:05, skipping insertion in model container [2021-12-07 00:10:05,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:01" (2/3) ... [2021-12-07 00:10:05,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee01af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:10:05, skipping insertion in model container [2021-12-07 00:10:05,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:10:05" (3/3) ... [2021-12-07 00:10:05,016 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-07 00:10:05,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:10:05,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 00:10:05,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:10:05,061 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:10:05,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 00:10:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:10:05,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:05,093 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] [2021-12-07 00:10:05,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-07 00:10:05,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:05,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073583400] [2021-12-07 00:10:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:05,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:05,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:05,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073583400] [2021-12-07 00:10:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073583400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:05,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:05,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:10:05,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123442930] [2021-12-07 00:10:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:05,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:10:05,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:10:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:10:05,254 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:05,316 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-07 00:10:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:10:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-07 00:10:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:05,333 INFO L225 Difference]: With dead ends: 1736 [2021-12-07 00:10:05,333 INFO L226 Difference]: Without dead ends: 814 [2021-12-07 00:10:05,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:10:05,341 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:05,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:05,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-07 00:10:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-07 00:10:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-07 00:10:05,403 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-07 00:10:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-07 00:10:05,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-07 00:10:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:10:05,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:05,405 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] [2021-12-07 00:10:05,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:10:05,405 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-07 00:10:05,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:05,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424160643] [2021-12-07 00:10:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:05,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:05,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424160643] [2021-12-07 00:10:05,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424160643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:05,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:05,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:05,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080854773] [2021-12-07 00:10:05,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:05,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:05,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:05,466 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:05,592 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-07 00:10:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:10:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-07 00:10:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:05,600 INFO L225 Difference]: With dead ends: 856 [2021-12-07 00:10:05,600 INFO L226 Difference]: Without dead ends: 814 [2021-12-07 00:10:05,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:10:05,603 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:05,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-07 00:10:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-07 00:10:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-07 00:10:05,630 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-07 00:10:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:05,630 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-07 00:10:05,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-07 00:10:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:10:05,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:05,632 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] [2021-12-07 00:10:05,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:10:05,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-07 00:10:05,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:05,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753804023] [2021-12-07 00:10:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:05,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:05,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753804023] [2021-12-07 00:10:05,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753804023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:05,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:05,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:05,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640736419] [2021-12-07 00:10:05,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:05,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:05,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:05,694 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:05,720 INFO L93 Difference]: Finished difference Result 884 states and 1628 transitions. [2021-12-07 00:10:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-07 00:10:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:05,725 INFO L225 Difference]: With dead ends: 884 [2021-12-07 00:10:05,725 INFO L226 Difference]: Without dead ends: 846 [2021-12-07 00:10:05,725 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 [2021-12-07 00:10:05,726 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 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 [2021-12-07 00:10:05,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-07 00:10:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-07 00:10:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8610451306413303) internal successors, (1567), 843 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1567 transitions. [2021-12-07 00:10:05,745 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1567 transitions. Word has length 41 [2021-12-07 00:10:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:05,746 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1567 transitions. [2021-12-07 00:10:05,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1567 transitions. [2021-12-07 00:10:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:10:05,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:05,747 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] [2021-12-07 00:10:05,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:10:05,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-07 00:10:05,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794045759] [2021-12-07 00:10:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:05,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:05,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:05,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794045759] [2021-12-07 00:10:05,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794045759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:05,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:05,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:05,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473855322] [2021-12-07 00:10:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:05,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:05,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:05,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:05,802 INFO L87 Difference]: Start difference. First operand 844 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:05,827 INFO L93 Difference]: Finished difference Result 968 states and 1759 transitions. [2021-12-07 00:10:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-07 00:10:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:05,832 INFO L225 Difference]: With dead ends: 968 [2021-12-07 00:10:05,832 INFO L226 Difference]: Without dead ends: 900 [2021-12-07 00:10:05,833 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 [2021-12-07 00:10:05,834 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 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 [2021-12-07 00:10:05,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-07 00:10:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 898. [2021-12-07 00:10:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8415178571428572) internal successors, (1650), 897 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1650 transitions. [2021-12-07 00:10:05,854 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1650 transitions. Word has length 41 [2021-12-07 00:10:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:05,855 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1650 transitions. [2021-12-07 00:10:05,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1650 transitions. [2021-12-07 00:10:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:10:05,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:05,856 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] [2021-12-07 00:10:05,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:10:05,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-07 00:10:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800740546] [2021-12-07 00:10:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:05,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:05,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:05,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800740546] [2021-12-07 00:10:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800740546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:05,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:05,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:05,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237946774] [2021-12-07 00:10:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:05,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:05,913 INFO L87 Difference]: Start difference. First operand 898 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,028 INFO L93 Difference]: Finished difference Result 1630 states and 2784 transitions. [2021-12-07 00:10:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:10:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-07 00:10:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,036 INFO L225 Difference]: With dead ends: 1630 [2021-12-07 00:10:06,036 INFO L226 Difference]: Without dead ends: 1508 [2021-12-07 00:10:06,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:10:06,038 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:06,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-07 00:10:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1018. [2021-12-07 00:10:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1016 states have (on average 1.8011811023622046) internal successors, (1830), 1017 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1830 transitions. [2021-12-07 00:10:06,069 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1830 transitions. Word has length 41 [2021-12-07 00:10:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:06,070 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1830 transitions. [2021-12-07 00:10:06,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1830 transitions. [2021-12-07 00:10:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:10:06,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:06,071 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] [2021-12-07 00:10:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:10:06,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-07 00:10:06,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:06,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009122526] [2021-12-07 00:10:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:06,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:06,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009122526] [2021-12-07 00:10:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009122526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:06,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:06,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:06,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376653732] [2021-12-07 00:10:06,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:06,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:06,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:06,131 INFO L87 Difference]: Start difference. First operand 1018 states and 1830 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,173 INFO L93 Difference]: Finished difference Result 1458 states and 2492 transitions. [2021-12-07 00:10:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-07 00:10:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,181 INFO L225 Difference]: With dead ends: 1458 [2021-12-07 00:10:06,182 INFO L226 Difference]: Without dead ends: 1216 [2021-12-07 00:10:06,183 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 [2021-12-07 00:10:06,184 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:06,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-07 00:10:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1206. [2021-12-07 00:10:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.739202657807309) internal successors, (2094), 1205 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2094 transitions. [2021-12-07 00:10:06,228 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2094 transitions. Word has length 43 [2021-12-07 00:10:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2094 transitions. [2021-12-07 00:10:06,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2094 transitions. [2021-12-07 00:10:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:10:06,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:06,230 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] [2021-12-07 00:10:06,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:10:06,230 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-07 00:10:06,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:06,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679733188] [2021-12-07 00:10:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:06,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:06,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679733188] [2021-12-07 00:10:06,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679733188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:06,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:06,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:06,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24384867] [2021-12-07 00:10:06,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:06,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:06,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:06,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:06,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:06,332 INFO L87 Difference]: Start difference. First operand 1206 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,412 INFO L93 Difference]: Finished difference Result 1638 states and 2728 transitions. [2021-12-07 00:10:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:10:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-07 00:10:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,418 INFO L225 Difference]: With dead ends: 1638 [2021-12-07 00:10:06,418 INFO L226 Difference]: Without dead ends: 1208 [2021-12-07 00:10:06,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:10:06,419 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:06,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-12-07 00:10:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2021-12-07 00:10:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.7325581395348837) internal successors, (2086), 1205 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2086 transitions. [2021-12-07 00:10:06,448 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2086 transitions. Word has length 43 [2021-12-07 00:10:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:06,449 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2086 transitions. [2021-12-07 00:10:06,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2086 transitions. [2021-12-07 00:10:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 00:10:06,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:06,450 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] [2021-12-07 00:10:06,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:10:06,450 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-07 00:10:06,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952034656] [2021-12-07 00:10:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:06,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:06,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952034656] [2021-12-07 00:10:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952034656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:06,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:06,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:06,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737851016] [2021-12-07 00:10:06,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:06,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:06,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:06,499 INFO L87 Difference]: Start difference. First operand 1206 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,563 INFO L93 Difference]: Finished difference Result 1540 states and 2558 transitions. [2021-12-07 00:10:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:10:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-07 00:10:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,571 INFO L225 Difference]: With dead ends: 1540 [2021-12-07 00:10:06,571 INFO L226 Difference]: Without dead ends: 1538 [2021-12-07 00:10:06,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:10:06,572 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:06,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-07 00:10:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1230. [2021-12-07 00:10:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1228 states have (on average 1.714983713355049) internal successors, (2106), 1229 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2106 transitions. [2021-12-07 00:10:06,607 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2106 transitions. Word has length 44 [2021-12-07 00:10:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:06,607 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2106 transitions. [2021-12-07 00:10:06,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2106 transitions. [2021-12-07 00:10:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 00:10:06,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:06,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:10:06,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:10:06,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-07 00:10:06,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:06,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88610733] [2021-12-07 00:10:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:06,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:06,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:06,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88610733] [2021-12-07 00:10:06,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88610733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:06,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:06,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:06,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779869516] [2021-12-07 00:10:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:06,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:06,634 INFO L87 Difference]: Start difference. First operand 1230 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,671 INFO L93 Difference]: Finished difference Result 1701 states and 2784 transitions. [2021-12-07 00:10:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-07 00:10:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,678 INFO L225 Difference]: With dead ends: 1701 [2021-12-07 00:10:06,678 INFO L226 Difference]: Without dead ends: 1434 [2021-12-07 00:10:06,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:06,679 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 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 [2021-12-07 00:10:06,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-12-07 00:10:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1432. [2021-12-07 00:10:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1430 states have (on average 1.6671328671328671) internal successors, (2384), 1431 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2384 transitions. [2021-12-07 00:10:06,739 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2384 transitions. Word has length 45 [2021-12-07 00:10:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:06,739 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2384 transitions. [2021-12-07 00:10:06,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2384 transitions. [2021-12-07 00:10:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:10:06,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:06,741 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:06,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 00:10:06,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-07 00:10:06,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:06,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174291348] [2021-12-07 00:10:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:06,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:10:06,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174291348] [2021-12-07 00:10:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174291348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:06,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:06,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:06,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717071969] [2021-12-07 00:10:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:06,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:06,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:06,787 INFO L87 Difference]: Start difference. First operand 1432 states and 2384 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:06,928 INFO L93 Difference]: Finished difference Result 3536 states and 5336 transitions. [2021-12-07 00:10:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:10:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-07 00:10:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:06,941 INFO L225 Difference]: With dead ends: 3536 [2021-12-07 00:10:06,941 INFO L226 Difference]: Without dead ends: 2882 [2021-12-07 00:10:06,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:10:06,944 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:06,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-12-07 00:10:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2084. [2021-12-07 00:10:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2082 states have (on average 1.5811719500480308) internal successors, (3292), 2083 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3292 transitions. [2021-12-07 00:10:07,023 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3292 transitions. Word has length 64 [2021-12-07 00:10:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3292 transitions. [2021-12-07 00:10:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3292 transitions. [2021-12-07 00:10:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:10:07,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:07,024 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:07,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 00:10:07,025 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-07 00:10:07,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133460636] [2021-12-07 00:10:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:07,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:10:07,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133460636] [2021-12-07 00:10:07,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133460636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:07,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851790040] [2021-12-07 00:10:07,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:07,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:07,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:07,069 INFO L87 Difference]: Start difference. First operand 2084 states and 3292 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:07,258 INFO L93 Difference]: Finished difference Result 4188 states and 6244 transitions. [2021-12-07 00:10:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:10:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-07 00:10:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:07,278 INFO L225 Difference]: With dead ends: 4188 [2021-12-07 00:10:07,279 INFO L226 Difference]: Without dead ends: 3534 [2021-12-07 00:10:07,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:10:07,281 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3078 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:07,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3217 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-12-07 00:10:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 3064. [2021-12-07 00:10:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3062 states have (on average 1.5166557805355976) internal successors, (4644), 3063 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4644 transitions. [2021-12-07 00:10:07,411 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4644 transitions. Word has length 64 [2021-12-07 00:10:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 4644 transitions. [2021-12-07 00:10:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4644 transitions. [2021-12-07 00:10:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:10:07,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:07,413 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:07,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:10:07,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-07 00:10:07,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:07,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641217023] [2021-12-07 00:10:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:07,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:07,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641217023] [2021-12-07 00:10:07,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641217023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:07,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:07,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:07,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056289395] [2021-12-07 00:10:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:07,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:07,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:07,450 INFO L87 Difference]: Start difference. First operand 3064 states and 4644 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:07,534 INFO L93 Difference]: Finished difference Result 4714 states and 6968 transitions. [2021-12-07 00:10:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-07 00:10:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:07,545 INFO L225 Difference]: With dead ends: 4714 [2021-12-07 00:10:07,545 INFO L226 Difference]: Without dead ends: 2428 [2021-12-07 00:10:07,547 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 [2021-12-07 00:10:07,548 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:07,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-12-07 00:10:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2426. [2021-12-07 00:10:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2424 states have (on average 1.549917491749175) internal successors, (3757), 2425 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3757 transitions. [2021-12-07 00:10:07,621 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3757 transitions. Word has length 66 [2021-12-07 00:10:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:07,621 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 3757 transitions. [2021-12-07 00:10:07,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3757 transitions. [2021-12-07 00:10:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:10:07,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:07,622 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:07,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:10:07,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-07 00:10:07,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399560800] [2021-12-07 00:10:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:07,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:10:07,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399560800] [2021-12-07 00:10:07,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399560800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:07,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:07,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:07,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026543464] [2021-12-07 00:10:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:07,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:10:07,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:10:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:07,660 INFO L87 Difference]: Start difference. First operand 2426 states and 3757 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:07,776 INFO L93 Difference]: Finished difference Result 3826 states and 5729 transitions. [2021-12-07 00:10:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:10:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-07 00:10:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:07,790 INFO L225 Difference]: With dead ends: 3826 [2021-12-07 00:10:07,790 INFO L226 Difference]: Without dead ends: 3360 [2021-12-07 00:10:07,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:10:07,792 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3076 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:07,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 3207 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-12-07 00:10:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2890. [2021-12-07 00:10:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2888 states have (on average 1.5252770083102494) internal successors, (4405), 2889 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4405 transitions. [2021-12-07 00:10:07,899 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4405 transitions. Word has length 66 [2021-12-07 00:10:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:07,899 INFO L470 AbstractCegarLoop]: Abstraction has 2890 states and 4405 transitions. [2021-12-07 00:10:07,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4405 transitions. [2021-12-07 00:10:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:10:07,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:07,900 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] [2021-12-07 00:10:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:10:07,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash -914037272, now seen corresponding path program 1 times [2021-12-07 00:10:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:07,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92639881] [2021-12-07 00:10:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:07,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:07,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92639881] [2021-12-07 00:10:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92639881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:07,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:07,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:07,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151830879] [2021-12-07 00:10:07,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:07,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:10:07,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:07,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:10:07,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:10:07,947 INFO L87 Difference]: Start difference. First operand 2890 states and 4405 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:12,337 INFO L93 Difference]: Finished difference Result 5145 states and 8714 transitions. [2021-12-07 00:10:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:10:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-07 00:10:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:12,355 INFO L225 Difference]: With dead ends: 5145 [2021-12-07 00:10:12,355 INFO L226 Difference]: Without dead ends: 4392 [2021-12-07 00:10:12,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:10:12,357 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 2342 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:12,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 792 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-07 00:10:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-12-07 00:10:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 4392. [2021-12-07 00:10:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4390 states have (on average 1.4535307517084282) internal successors, (6381), 4391 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6381 transitions. [2021-12-07 00:10:12,486 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6381 transitions. Word has length 67 [2021-12-07 00:10:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:12,486 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 6381 transitions. [2021-12-07 00:10:12,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6381 transitions. [2021-12-07 00:10:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:10:12,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:12,487 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:12,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:10:12,488 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-07 00:10:12,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:12,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874066380] [2021-12-07 00:10:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:12,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:12,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874066380] [2021-12-07 00:10:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874066380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:10:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777115115] [2021-12-07 00:10:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:12,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:12,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:12,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:10:12,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:10:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:10:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:10:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:10:12,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:10:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:10:13,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777115115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:10:13,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:10:13,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-07 00:10:13,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089634651] [2021-12-07 00:10:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:10:13,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:10:13,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:10:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:10:13,095 INFO L87 Difference]: Start difference. First operand 4392 states and 6381 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:15,559 INFO L93 Difference]: Finished difference Result 23236 states and 32184 transitions. [2021-12-07 00:10:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-07 00:10:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 67 [2021-12-07 00:10:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:15,588 INFO L225 Difference]: With dead ends: 23236 [2021-12-07 00:10:15,588 INFO L226 Difference]: Without dead ends: 21146 [2021-12-07 00:10:15,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-07 00:10:15,594 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 17309 mSDsluCounter, 5304 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17309 SdHoareTripleChecker+Valid, 6871 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:15,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17309 Valid, 6871 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:10:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21146 states. [2021-12-07 00:10:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21146 to 13256. [2021-12-07 00:10:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13254 states have (on average 1.3618530255017354) internal successors, (18050), 13255 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18050 transitions. [2021-12-07 00:10:16,236 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18050 transitions. Word has length 67 [2021-12-07 00:10:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:16,236 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 18050 transitions. [2021-12-07 00:10:16,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18050 transitions. [2021-12-07 00:10:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:16,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:16,238 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:16,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:10:16,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:10:16,440 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-07 00:10:16,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:16,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835376302] [2021-12-07 00:10:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:16,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:16,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835376302] [2021-12-07 00:10:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835376302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:10:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82479985] [2021-12-07 00:10:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:16,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:16,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:10:16,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:10:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:16,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:10:16,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:10:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:17,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:10:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:17,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82479985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:10:17,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:10:17,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-07 00:10:17,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002748081] [2021-12-07 00:10:17,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:10:17,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:10:17,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:10:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:10:17,474 INFO L87 Difference]: Start difference. First operand 13256 states and 18050 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 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) [2021-12-07 00:10:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:21,298 INFO L93 Difference]: Finished difference Result 67685 states and 89557 transitions. [2021-12-07 00:10:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 00:10:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 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 68 [2021-12-07 00:10:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:21,372 INFO L225 Difference]: With dead ends: 67685 [2021-12-07 00:10:21,373 INFO L226 Difference]: Without dead ends: 58417 [2021-12-07 00:10:21,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-07 00:10:21,391 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 14490 mSDsluCounter, 6772 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14490 SdHoareTripleChecker+Valid, 8320 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:21,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14490 Valid, 8320 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:10:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58417 states. [2021-12-07 00:10:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58417 to 27725. [2021-12-07 00:10:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27725 states, 27723 states have (on average 1.343469321502002) internal successors, (37245), 27724 states have internal predecessors, (37245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27725 states to 27725 states and 37245 transitions. [2021-12-07 00:10:23,006 INFO L78 Accepts]: Start accepts. Automaton has 27725 states and 37245 transitions. Word has length 68 [2021-12-07 00:10:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 27725 states and 37245 transitions. [2021-12-07 00:10:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 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) [2021-12-07 00:10:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 27725 states and 37245 transitions. [2021-12-07 00:10:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:23,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:23,008 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:23,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 00:10:23,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:23,210 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-07 00:10:23,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:23,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815635169] [2021-12-07 00:10:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:23,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:23,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815635169] [2021-12-07 00:10:23,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815635169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:10:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648586934] [2021-12-07 00:10:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:23,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:23,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:23,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:10:23,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:10:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:10:23,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:10:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:23,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:10:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:24,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648586934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:10:24,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:10:24,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-07 00:10:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633147193] [2021-12-07 00:10:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:10:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:10:24,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:10:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:10:24,233 INFO L87 Difference]: Start difference. First operand 27725 states and 37245 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:29,430 INFO L93 Difference]: Finished difference Result 103996 states and 137396 transitions. [2021-12-07 00:10:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:10:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-07 00:10:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:29,519 INFO L225 Difference]: With dead ends: 103996 [2021-12-07 00:10:29,519 INFO L226 Difference]: Without dead ends: 81773 [2021-12-07 00:10:29,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 00:10:29,550 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 13909 mSDsluCounter, 4797 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13909 SdHoareTripleChecker+Valid, 6328 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:29,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13909 Valid, 6328 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:10:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81773 states. [2021-12-07 00:10:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81773 to 54762. [2021-12-07 00:10:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54762 states, 54760 states have (on average 1.3195945945945946) internal successors, (72261), 54761 states have internal predecessors, (72261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54762 states to 54762 states and 72261 transitions. [2021-12-07 00:10:32,960 INFO L78 Accepts]: Start accepts. Automaton has 54762 states and 72261 transitions. Word has length 68 [2021-12-07 00:10:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:32,961 INFO L470 AbstractCegarLoop]: Abstraction has 54762 states and 72261 transitions. [2021-12-07 00:10:32,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 54762 states and 72261 transitions. [2021-12-07 00:10:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:32,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:32,963 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:32,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:10:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:10:33,164 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-07 00:10:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596902244] [2021-12-07 00:10:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:33,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:33,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:33,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596902244] [2021-12-07 00:10:33,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596902244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:33,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:33,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:33,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914327793] [2021-12-07 00:10:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:33,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:33,225 INFO L87 Difference]: Start difference. First operand 54762 states and 72261 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:35,204 INFO L93 Difference]: Finished difference Result 79200 states and 103804 transitions. [2021-12-07 00:10:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-07 00:10:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:35,238 INFO L225 Difference]: With dead ends: 79200 [2021-12-07 00:10:35,238 INFO L226 Difference]: Without dead ends: 32120 [2021-12-07 00:10:35,264 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 [2021-12-07 00:10:35,265 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32120 states. [2021-12-07 00:10:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32120 to 31692. [2021-12-07 00:10:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 31690 states have (on average 1.2890186178605239) internal successors, (40849), 31691 states have internal predecessors, (40849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 40849 transitions. [2021-12-07 00:10:37,045 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 40849 transitions. Word has length 68 [2021-12-07 00:10:37,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:37,045 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 40849 transitions. [2021-12-07 00:10:37,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 40849 transitions. [2021-12-07 00:10:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:37,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:37,047 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:37,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 00:10:37,047 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-07 00:10:37,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:37,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245901463] [2021-12-07 00:10:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:37,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:37,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245901463] [2021-12-07 00:10:37,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245901463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:37,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:37,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:10:37,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961533190] [2021-12-07 00:10:37,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:10:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:10:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:10:37,071 INFO L87 Difference]: Start difference. First operand 31692 states and 40849 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:38,146 INFO L93 Difference]: Finished difference Result 47678 states and 61063 transitions. [2021-12-07 00:10:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:10:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-07 00:10:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:38,166 INFO L225 Difference]: With dead ends: 47678 [2021-12-07 00:10:38,166 INFO L226 Difference]: Without dead ends: 21614 [2021-12-07 00:10:38,179 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 [2021-12-07 00:10:38,179 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:38,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21614 states. [2021-12-07 00:10:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21614 to 21612. [2021-12-07 00:10:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 21610 states have (on average 1.2683017121702915) internal successors, (27408), 21611 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 27408 transitions. [2021-12-07 00:10:39,262 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 27408 transitions. Word has length 68 [2021-12-07 00:10:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 27408 transitions. [2021-12-07 00:10:39,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 27408 transitions. [2021-12-07 00:10:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:39,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:39,264 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:39,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:10:39,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-07 00:10:39,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158433681] [2021-12-07 00:10:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:39,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:10:39,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:39,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158433681] [2021-12-07 00:10:39,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158433681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:39,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:39,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:39,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099545383] [2021-12-07 00:10:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:39,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:10:39,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:10:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:10:39,299 INFO L87 Difference]: Start difference. First operand 21612 states and 27408 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:40,117 INFO L93 Difference]: Finished difference Result 31423 states and 39772 transitions. [2021-12-07 00:10:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:10:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-07 00:10:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:40,129 INFO L225 Difference]: With dead ends: 31423 [2021-12-07 00:10:40,129 INFO L226 Difference]: Without dead ends: 12176 [2021-12-07 00:10:40,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:10:40,140 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:40,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12176 states. [2021-12-07 00:10:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12176 to 12176. [2021-12-07 00:10:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12174 states have (on average 1.2839658288155085) internal successors, (15631), 12175 states have internal predecessors, (15631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 15631 transitions. [2021-12-07 00:10:40,858 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 15631 transitions. Word has length 68 [2021-12-07 00:10:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 15631 transitions. [2021-12-07 00:10:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 15631 transitions. [2021-12-07 00:10:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:40,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:40,859 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:40,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 00:10:40,860 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-07 00:10:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31912364] [2021-12-07 00:10:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:40,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 00:10:40,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:40,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31912364] [2021-12-07 00:10:40,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31912364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:40,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:40,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:40,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887323215] [2021-12-07 00:10:40,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:40,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:10:40,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:10:40,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:10:40,892 INFO L87 Difference]: Start difference. First operand 12176 states and 15631 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:41,408 INFO L93 Difference]: Finished difference Result 19465 states and 24642 transitions. [2021-12-07 00:10:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:10:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-07 00:10:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:41,417 INFO L225 Difference]: With dead ends: 19465 [2021-12-07 00:10:41,417 INFO L226 Difference]: Without dead ends: 9664 [2021-12-07 00:10:41,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:10:41,422 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4558 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:41,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 2955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-12-07 00:10:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9664. [2021-12-07 00:10:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9664 states, 9662 states have (on average 1.2819292072034776) internal successors, (12386), 9663 states have internal predecessors, (12386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9664 states to 9664 states and 12386 transitions. [2021-12-07 00:10:41,936 INFO L78 Accepts]: Start accepts. Automaton has 9664 states and 12386 transitions. Word has length 68 [2021-12-07 00:10:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:41,936 INFO L470 AbstractCegarLoop]: Abstraction has 9664 states and 12386 transitions. [2021-12-07 00:10:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9664 states and 12386 transitions. [2021-12-07 00:10:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:10:41,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:41,937 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:41,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 00:10:41,937 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-07 00:10:41,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648029440] [2021-12-07 00:10:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:41,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:10:41,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:41,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648029440] [2021-12-07 00:10:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648029440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:10:41,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:10:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:10:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877451133] [2021-12-07 00:10:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:10:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:10:41,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:10:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:10:41,968 INFO L87 Difference]: Start difference. First operand 9664 states and 12386 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:42,759 INFO L93 Difference]: Finished difference Result 20973 states and 26287 transitions. [2021-12-07 00:10:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:10:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 68 [2021-12-07 00:10:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:42,772 INFO L225 Difference]: With dead ends: 20973 [2021-12-07 00:10:42,772 INFO L226 Difference]: Without dead ends: 13623 [2021-12-07 00:10:42,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:10:42,778 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4690 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4690 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:42,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4690 Valid, 3000 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:10:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13623 states. [2021-12-07 00:10:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13623 to 12757. [2021-12-07 00:10:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12757 states, 12755 states have (on average 1.2619364954919638) internal successors, (16096), 12756 states have internal predecessors, (16096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12757 states to 12757 states and 16096 transitions. [2021-12-07 00:10:43,509 INFO L78 Accepts]: Start accepts. Automaton has 12757 states and 16096 transitions. Word has length 68 [2021-12-07 00:10:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:43,510 INFO L470 AbstractCegarLoop]: Abstraction has 12757 states and 16096 transitions. [2021-12-07 00:10:43,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12757 states and 16096 transitions. [2021-12-07 00:10:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 00:10:43,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:43,511 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:10:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 00:10:43,511 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:10:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-07 00:10:43,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:43,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548247564] [2021-12-07 00:10:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:43,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:43,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:43,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548247564] [2021-12-07 00:10:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548247564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:10:43,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323600222] [2021-12-07 00:10:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:43,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:43,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:43,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:10:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:10:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:10:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:07,497 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 2800 DAG size of output: 2805 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-07 00:11:57,537 WARN L227 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 15 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-07 00:17:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:17:56,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:17:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323600222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:58,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:58,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 63 [2021-12-07 00:17:58,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382105331] [2021-12-07 00:17:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-07 00:17:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-07 00:17:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3503, Unknown=0, NotChecked=0, Total=3906 [2021-12-07 00:17:58,938 INFO L87 Difference]: Start difference. First operand 12757 states and 16096 transitions. Second operand has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:39,781 INFO L93 Difference]: Finished difference Result 34640 states and 42141 transitions. [2021-12-07 00:18:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-12-07 00:18:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 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 69 [2021-12-07 00:18:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:39,811 INFO L225 Difference]: With dead ends: 34640 [2021-12-07 00:18:39,811 INFO L226 Difference]: Without dead ends: 27336 [2021-12-07 00:18:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19093 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=7871, Invalid=45259, Unknown=0, NotChecked=0, Total=53130 [2021-12-07 00:18:39,835 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 27338 mSDsluCounter, 36067 mSDsCounter, 0 mSdLazyCounter, 3401 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27338 SdHoareTripleChecker+Valid, 37717 SdHoareTripleChecker+Invalid, 3992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 3401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:39,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27338 Valid, 37717 Invalid, 3992 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [591 Valid, 3401 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-07 00:18:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27336 states. [2021-12-07 00:18:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27336 to 13255. [2021-12-07 00:18:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13253 states have (on average 1.260846600769637) internal successors, (16710), 13254 states have internal predecessors, (16710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 16710 transitions. [2021-12-07 00:18:40,867 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 16710 transitions. Word has length 69 [2021-12-07 00:18:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:40,867 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 16710 transitions. [2021-12-07 00:18:40,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 16710 transitions. [2021-12-07 00:18:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:18:40,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:40,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:40,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:18:41,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:18:41,070 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1413115926, now seen corresponding path program 1 times [2021-12-07 00:18:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272818187] [2021-12-07 00:18:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:41,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:41,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272818187] [2021-12-07 00:18:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272818187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720644694] [2021-12-07 00:18:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:41,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:41,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:41,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:18:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:18:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:42,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:42,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720644694] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:42,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:42,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-07 00:18:42,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803568412] [2021-12-07 00:18:42,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:42,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:18:42,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:18:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:18:42,735 INFO L87 Difference]: Start difference. First operand 13255 states and 16710 transitions. Second operand has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:44,433 INFO L93 Difference]: Finished difference Result 17433 states and 21904 transitions. [2021-12-07 00:18:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:18:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-07 00:18:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:44,443 INFO L225 Difference]: With dead ends: 17433 [2021-12-07 00:18:44,443 INFO L226 Difference]: Without dead ends: 10927 [2021-12-07 00:18:44,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:18:44,448 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 3482 mSDsluCounter, 18988 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 20573 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:44,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3482 Valid, 20573 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:18:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2021-12-07 00:18:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 8211. [2021-12-07 00:18:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8211 states, 8209 states have (on average 1.3001583627725668) internal successors, (10673), 8210 states have internal predecessors, (10673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8211 states to 8211 states and 10673 transitions. [2021-12-07 00:18:45,046 INFO L78 Accepts]: Start accepts. Automaton has 8211 states and 10673 transitions. Word has length 71 [2021-12-07 00:18:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 8211 states and 10673 transitions. [2021-12-07 00:18:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8211 states and 10673 transitions. [2021-12-07 00:18:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:18:45,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:45,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:45,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:18:45,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 00:18:45,249 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 60703281, now seen corresponding path program 1 times [2021-12-07 00:18:45,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063820169] [2021-12-07 00:18:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:45,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:46,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063820169] [2021-12-07 00:18:46,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063820169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331952631] [2021-12-07 00:18:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:46,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:46,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:46,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:18:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 00:18:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:47,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:47,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331952631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:47,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:47,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 45 [2021-12-07 00:18:47,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134103033] [2021-12-07 00:18:47,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:47,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 00:18:47,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 00:18:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 00:18:47,801 INFO L87 Difference]: Start difference. First operand 8211 states and 10673 transitions. Second operand has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:52,414 INFO L93 Difference]: Finished difference Result 26865 states and 33770 transitions. [2021-12-07 00:18:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 00:18:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 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 71 [2021-12-07 00:18:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:52,437 INFO L225 Difference]: With dead ends: 26865 [2021-12-07 00:18:52,437 INFO L226 Difference]: Without dead ends: 24000 [2021-12-07 00:18:52,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=568, Invalid=3988, Unknown=0, NotChecked=0, Total=4556 [2021-12-07 00:18:52,443 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 11482 mSDsluCounter, 36272 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11482 SdHoareTripleChecker+Valid, 37839 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:52,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11482 Valid, 37839 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 00:18:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-12-07 00:18:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 7854. [2021-12-07 00:18:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7852 states have (on average 1.304253693326541) internal successors, (10241), 7853 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 10241 transitions. [2021-12-07 00:18:53,119 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 10241 transitions. Word has length 71 [2021-12-07 00:18:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:53,119 INFO L470 AbstractCegarLoop]: Abstraction has 7854 states and 10241 transitions. [2021-12-07 00:18:53,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 10241 transitions. [2021-12-07 00:18:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 00:18:53,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:53,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-07 00:18:53,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:18:53,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 00:18:53,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1260888971, now seen corresponding path program 1 times [2021-12-07 00:18:53,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289677858] [2021-12-07 00:18:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:53,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:53,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:53,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289677858] [2021-12-07 00:18:53,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289677858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:53,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941509980] [2021-12-07 00:18:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:53,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:53,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:53,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:53,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:18:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:18:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:54,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:55,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941509980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:55,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:55,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2021-12-07 00:18:55,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624564977] [2021-12-07 00:18:55,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:55,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:18:55,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:18:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:18:55,335 INFO L87 Difference]: Start difference. First operand 7854 states and 10241 transitions. Second operand has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:19:38,189 INFO L93 Difference]: Finished difference Result 34218 states and 41544 transitions. [2021-12-07 00:19:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-12-07 00:19:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 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 116 [2021-12-07 00:19:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:19:38,216 INFO L225 Difference]: With dead ends: 34218 [2021-12-07 00:19:38,216 INFO L226 Difference]: Without dead ends: 29207 [2021-12-07 00:19:38,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31402 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=9416, Invalid=71524, Unknown=0, NotChecked=0, Total=80940 [2021-12-07 00:19:38,232 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 19383 mSDsluCounter, 27771 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19383 SdHoareTripleChecker+Valid, 29471 SdHoareTripleChecker+Invalid, 3940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:19:38,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19383 Valid, 29471 Invalid, 3940 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [673 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 00:19:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29207 states. [2021-12-07 00:19:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29207 to 9001. [2021-12-07 00:19:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 8999 states have (on average 1.277808645405045) internal successors, (11499), 9000 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 11499 transitions. [2021-12-07 00:19:39,407 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 11499 transitions. Word has length 116 [2021-12-07 00:19:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:19:39,408 INFO L470 AbstractCegarLoop]: Abstraction has 9001 states and 11499 transitions. [2021-12-07 00:19:39,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 11499 transitions. [2021-12-07 00:19:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 00:19:39,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:19:39,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-07 00:19:39,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:19:39,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:19:39,611 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:19:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:19:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash -159242140, now seen corresponding path program 1 times [2021-12-07 00:19:39,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:19:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249239384] [2021-12-07 00:19:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:39,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:19:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:39,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249239384] [2021-12-07 00:19:39,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249239384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:19:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672835920] [2021-12-07 00:19:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:39,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:19:39,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:19:39,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:19:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 00:19:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:19:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:57,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:59,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672835920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:59,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:19:59,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-07 00:19:59,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981892336] [2021-12-07 00:19:59,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:59,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 00:19:59,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 00:19:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=550, Unknown=8, NotChecked=0, Total=650 [2021-12-07 00:19:59,974 INFO L87 Difference]: Start difference. First operand 9001 states and 11499 transitions. Second operand has 26 states, 26 states have (on average 10.192307692307692) internal successors, (265), 25 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:20:06,184 INFO L93 Difference]: Finished difference Result 13734 states and 17164 transitions. [2021-12-07 00:20:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:20:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 10.192307692307692) internal successors, (265), 25 states have internal predecessors, (265), 0 states have call successors, (0), 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 116 [2021-12-07 00:20:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:20:06,193 INFO L225 Difference]: With dead ends: 13734 [2021-12-07 00:20:06,193 INFO L226 Difference]: Without dead ends: 10285 [2021-12-07 00:20:06,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=273, Invalid=1051, Unknown=8, NotChecked=0, Total=1332 [2021-12-07 00:20:06,197 INFO L933 BasicCegarLoop]: 1539 mSDtfsCounter, 8977 mSDsluCounter, 19564 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8977 SdHoareTripleChecker+Valid, 21103 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:20:06,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8977 Valid, 21103 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2021-12-07 00:20:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10285 states. [2021-12-07 00:20:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10285 to 10281. [2021-12-07 00:20:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10281 states, 10279 states have (on average 1.2604338943476991) internal successors, (12956), 10280 states have internal predecessors, (12956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10281 states to 10281 states and 12956 transitions. [2021-12-07 00:20:07,605 INFO L78 Accepts]: Start accepts. Automaton has 10281 states and 12956 transitions. Word has length 116 [2021-12-07 00:20:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:20:07,605 INFO L470 AbstractCegarLoop]: Abstraction has 10281 states and 12956 transitions. [2021-12-07 00:20:07,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.192307692307692) internal successors, (265), 25 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10281 states and 12956 transitions. [2021-12-07 00:20:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 00:20:07,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:20:07,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-07 00:20:07,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:20:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:07,809 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:20:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:20:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1726681252, now seen corresponding path program 1 times [2021-12-07 00:20:07,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:20:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734760786] [2021-12-07 00:20:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:07,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:20:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:20:08,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:20:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734760786] [2021-12-07 00:20:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734760786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:20:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468751627] [2021-12-07 00:20:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:08,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:20:08,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:20:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:20:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 00:20:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:20:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:20:12,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:20:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:20:16,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468751627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:20:16,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:20:16,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 21] total 50 [2021-12-07 00:20:16,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139397543] [2021-12-07 00:20:16,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:20:16,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:20:16,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:20:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:20:16,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 00:20:16,562 INFO L87 Difference]: Start difference. First operand 10281 states and 12956 transitions. Second operand has 50 states, 50 states have (on average 6.4) internal successors, (320), 50 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:23:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:23:34,530 INFO L93 Difference]: Finished difference Result 22147 states and 27276 transitions. [2021-12-07 00:23:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-12-07 00:23:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.4) internal successors, (320), 50 states have internal predecessors, (320), 0 states have call successors, (0), 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 116 [2021-12-07 00:23:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:23:34,543 INFO L225 Difference]: With dead ends: 22147 [2021-12-07 00:23:34,544 INFO L226 Difference]: Without dead ends: 16107 [2021-12-07 00:23:34,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13994 ImplicationChecksByTransitivity, 180.3s TimeCoverageRelationStatistics Valid=4933, Invalid=40223, Unknown=0, NotChecked=0, Total=45156 [2021-12-07 00:23:34,550 INFO L933 BasicCegarLoop]: 1638 mSDtfsCounter, 25472 mSDsluCounter, 39018 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25472 SdHoareTripleChecker+Valid, 40656 SdHoareTripleChecker+Invalid, 4363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:23:34,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25472 Valid, 40656 Invalid, 4363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [898 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2021-12-07 00:23:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16107 states. [2021-12-07 00:23:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16107 to 9392. [2021-12-07 00:23:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9392 states, 9390 states have (on average 1.2603833865814698) internal successors, (11835), 9391 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:23:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9392 states to 9392 states and 11835 transitions. [2021-12-07 00:23:36,294 INFO L78 Accepts]: Start accepts. Automaton has 9392 states and 11835 transitions. Word has length 116 [2021-12-07 00:23:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:23:36,294 INFO L470 AbstractCegarLoop]: Abstraction has 9392 states and 11835 transitions. [2021-12-07 00:23:36,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.4) internal successors, (320), 50 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:23:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9392 states and 11835 transitions. [2021-12-07 00:23:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 00:23:36,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:23:36,296 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:23:36,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 00:23:36,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:23:36,497 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:23:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:23:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 229828600, now seen corresponding path program 1 times [2021-12-07 00:23:36,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:23:36,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328266890] [2021-12-07 00:23:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:36,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:23:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:36,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:23:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328266890] [2021-12-07 00:23:36,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328266890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:23:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73544044] [2021-12-07 00:23:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:36,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:23:36,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:23:36,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:23:36,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541c1f0-3d99-4433-be82-ce4368f273a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:23:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 00:23:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:23:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:23:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:44,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73544044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:23:44,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:23:44,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 17] total 52 [2021-12-07 00:23:44,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324828966] [2021-12-07 00:23:44,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:23:44,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:23:44,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:23:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:23:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2437, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 00:23:44,706 INFO L87 Difference]: Start difference. First operand 9392 states and 11835 transitions. Second operand has 52 states, 52 states have (on average 5.923076923076923) internal successors, (308), 52 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)