./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R --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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 15:44:00,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:44:00,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:44:00,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:44:00,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:44:00,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:44:00,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:44:00,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:44:00,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:44:00,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:44:00,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:44:00,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:44:00,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:44:00,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:44:00,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:44:00,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:44:00,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:44:00,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:44:00,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:44:00,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:44:00,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:44:00,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:44:00,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:44:00,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:44:00,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:44:00,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:44:00,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:44:00,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:44:00,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:44:00,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:44:00,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:44:00,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:44:00,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:44:00,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:44:00,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:44:00,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:44:00,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:44:00,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:44:00,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:44:00,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:44:00,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:44:00,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:44:00,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:44:00,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:44:00,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:44:00,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:44:00,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:44:00,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:44:00,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:44:00,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:44:00,984 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:44:00,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:44:00,984 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:44:00,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:44:00,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:44:00,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:44:00,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:44:00,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:44:00,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:44:00,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:44:00,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:44:00,987 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:44:00,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:44:00,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:44:00,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:44:00,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:44:00,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:44:00,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:44:00,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:44:00,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:44:00,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:44:00,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:44:00,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:44:00,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:44:00,991 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:44:00,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:44:00,992 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2022-11-25 15:44:01,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:44:01,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:44:01,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:44:01,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:44:01,368 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:44:01,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-25 15:44:05,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:44:05,560 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:44:05,561 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-25 15:44:05,568 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/data/90307a37e/bfa10888d800499dae5037387fe9f77f/FLAG8163987b8 [2022-11-25 15:44:05,585 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/data/90307a37e/bfa10888d800499dae5037387fe9f77f [2022-11-25 15:44:05,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:44:05,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:44:05,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:44:05,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:44:05,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:44:05,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:05,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2180a795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05, skipping insertion in model container [2022-11-25 15:44:05,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:05,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:44:05,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:44:05,827 WARN L237 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_8a99e366-441f-4207-b9d5-34e9743fb680/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-25 15:44:05,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:44:05,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:44:05,899 WARN L237 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_8a99e366-441f-4207-b9d5-34e9743fb680/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-25 15:44:05,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:44:05,950 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:44:05,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05 WrapperNode [2022-11-25 15:44:05,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:44:05,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:44:05,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:44:05,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:44:05,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:05,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:05,994 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 15:44:05,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:44:05,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:44:05,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:44:05,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:44:06,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:44:06,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:44:06,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:44:06,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:44:06,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (1/1) ... [2022-11-25 15:44:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:44:06,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:06,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:44:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:44:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:44:06,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:44:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:44:06,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:44:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:44:06,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:44:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:44:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:44:06,278 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:44:06,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:44:06,506 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:44:06,517 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:44:06,517 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 15:44:06,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:44:06 BoogieIcfgContainer [2022-11-25 15:44:06,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:44:06,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:44:06,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:44:06,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:44:06,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:44:05" (1/3) ... [2022-11-25 15:44:06,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebb6732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:44:06, skipping insertion in model container [2022-11-25 15:44:06,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:05" (2/3) ... [2022-11-25 15:44:06,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebb6732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:44:06, skipping insertion in model container [2022-11-25 15:44:06,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:44:06" (3/3) ... [2022-11-25 15:44:06,540 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2022-11-25 15:44:06,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:44:06,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:44:06,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:44:06,650 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@153f6221, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:44:06,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:44:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 15:44:06,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:06,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:06,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2022-11-25 15:44:06,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:06,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801637059] [2022-11-25 15:44:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:06,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:06,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801637059] [2022-11-25 15:44:06,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801637059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:06,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:06,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:44:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323611268] [2022-11-25 15:44:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:44:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:44:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:44:07,035 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:07,133 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2022-11-25 15:44:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:44:07,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-25 15:44:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:07,177 INFO L225 Difference]: With dead ends: 44 [2022-11-25 15:44:07,178 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 15:44:07,181 INFO L412 NwaCegarLoop]: 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 [2022-11-25 15:44:07,190 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:07,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:44:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 15:44:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-25 15:44:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-25 15:44:07,275 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2022-11-25 15:44:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:07,276 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-25 15:44:07,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-25 15:44:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:44:07,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:07,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:44:07,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2022-11-25 15:44:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908547368] [2022-11-25 15:44:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:07,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908547368] [2022-11-25 15:44:07,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908547368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23607785] [2022-11-25 15:44:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:07,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:07,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:07,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:44:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:44:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:07,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:07,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23607785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:07,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:44:07,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 15:44:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119622435] [2022-11-25 15:44:07,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:44:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:44:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:44:07,731 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:07,814 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-25 15:44:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:44:07,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-25 15:44:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:07,817 INFO L225 Difference]: With dead ends: 35 [2022-11-25 15:44:07,817 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 15:44:07,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:44:07,820 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:07,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 15:44:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-25 15:44:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2022-11-25 15:44:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-25 15:44:07,828 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-11-25 15:44:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:07,829 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-25 15:44:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-25 15:44:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 15:44:07,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:07,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:07,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:08,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2022-11-25 15:44:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:08,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175571094] [2022-11-25 15:44:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:08,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:08,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175571094] [2022-11-25 15:44:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175571094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956313560] [2022-11-25 15:44:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:08,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:44:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:44:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:08,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956313560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:08,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:08,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 15:44:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034805658] [2022-11-25 15:44:08,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:44:08,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:44:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:44:08,379 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:08,491 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-11-25 15:44:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:44:08,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 15 [2022-11-25 15:44:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:08,493 INFO L225 Difference]: With dead ends: 71 [2022-11-25 15:44:08,493 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 15:44:08,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:44:08,495 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 15:44:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2022-11-25 15:44:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-25 15:44:08,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2022-11-25 15:44:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:08,505 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-25 15:44:08,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-25 15:44:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 15:44:08,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:08,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:08,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:08,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:08,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2022-11-25 15:44:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:08,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853484830] [2022-11-25 15:44:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:44:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853484830] [2022-11-25 15:44:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853484830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:08,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:08,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:44:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886853072] [2022-11-25 15:44:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:44:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:44:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:44:08,867 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:08,918 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-11-25 15:44:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:44:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 21 [2022-11-25 15:44:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:08,920 INFO L225 Difference]: With dead ends: 48 [2022-11-25 15:44:08,920 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 15:44:08,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:44:08,922 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:08,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:44:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 15:44:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-25 15:44:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-25 15:44:08,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2022-11-25 15:44:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:08,945 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-25 15:44:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-25 15:44:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:44:08,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:08,948 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:44:08,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2022-11-25 15:44:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115423476] [2022-11-25 15:44:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:44:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115423476] [2022-11-25 15:44:09,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115423476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55916154] [2022-11-25 15:44:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:09,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:09,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:09,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:44:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:44:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:44:09,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:44:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55916154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:09,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:09,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 15:44:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866212858] [2022-11-25 15:44:09,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:09,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:44:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:44:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:44:09,560 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:10,040 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2022-11-25 15:44:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:44:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2022-11-25 15:44:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:10,042 INFO L225 Difference]: With dead ends: 97 [2022-11-25 15:44:10,042 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 15:44:10,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:44:10,044 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 240 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:10,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 76 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:44:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 15:44:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-25 15:44:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2022-11-25 15:44:10,063 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2022-11-25 15:44:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:10,064 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2022-11-25 15:44:10,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2022-11-25 15:44:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 15:44:10,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:10,066 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:10,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:10,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:10,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2022-11-25 15:44:10,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908255236] [2022-11-25 15:44:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 15:44:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908255236] [2022-11-25 15:44:10,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908255236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292682952] [2022-11-25 15:44:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:44:10,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:10,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:10,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:10,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:44:10,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:44:10,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:44:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 15:44:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 15:44:11,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292682952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:11,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:11,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 15:44:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884894906] [2022-11-25 15:44:11,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:11,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:44:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:44:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:44:11,335 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:11,774 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2022-11-25 15:44:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:44:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-25 15:44:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:11,783 INFO L225 Difference]: With dead ends: 329 [2022-11-25 15:44:11,784 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 15:44:11,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:44:11,790 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 567 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:11,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 256 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:44:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 15:44:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2022-11-25 15:44:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-11-25 15:44:11,842 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2022-11-25 15:44:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-11-25 15:44:11,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-11-25 15:44:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 15:44:11,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:11,851 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:11,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:12,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:12,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2022-11-25 15:44:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790068912] [2022-11-25 15:44:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 15:44:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790068912] [2022-11-25 15:44:13,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790068912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121921269] [2022-11-25 15:44:13,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:44:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:13,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:13,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:44:13,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:44:13,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:44:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-25 15:44:13,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:13,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121921269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:13,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:44:13,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2022-11-25 15:44:13,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364711622] [2022-11-25 15:44:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:44:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:44:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:44:13,367 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:13,514 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2022-11-25 15:44:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:44:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 84 [2022-11-25 15:44:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:13,519 INFO L225 Difference]: With dead ends: 193 [2022-11-25 15:44:13,519 INFO L226 Difference]: Without dead ends: 184 [2022-11-25 15:44:13,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2022-11-25 15:44:13,521 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:13,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-25 15:44:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2022-11-25 15:44:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2022-11-25 15:44:13,554 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2022-11-25 15:44:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:13,555 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2022-11-25 15:44:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2022-11-25 15:44:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 15:44:13,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:13,562 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:13,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 15:44:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:13,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2022-11-25 15:44:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903594434] [2022-11-25 15:44:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-25 15:44:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:14,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903594434] [2022-11-25 15:44:14,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903594434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:14,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909196851] [2022-11-25 15:44:14,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:44:14,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:14,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:14,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:14,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:44:14,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:44:14,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 15:44:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-25 15:44:15,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-25 15:44:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909196851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:16,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:16,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-25 15:44:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737271651] [2022-11-25 15:44:16,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 15:44:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 15:44:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 15:44:16,078 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:17,352 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2022-11-25 15:44:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 15:44:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-11-25 15:44:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:17,358 INFO L225 Difference]: With dead ends: 825 [2022-11-25 15:44:17,358 INFO L226 Difference]: Without dead ends: 767 [2022-11-25 15:44:17,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 15:44:17,362 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2258 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:17,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 581 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 15:44:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-25 15:44:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2022-11-25 15:44:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2022-11-25 15:44:17,406 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2022-11-25 15:44:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:17,406 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2022-11-25 15:44:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2022-11-25 15:44:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 15:44:17,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:17,418 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:17,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:17,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:44:17,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2022-11-25 15:44:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089903662] [2022-11-25 15:44:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-25 15:44:20,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089903662] [2022-11-25 15:44:20,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089903662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858909066] [2022-11-25 15:44:20,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:44:20,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:20,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:20,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:20,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:44:37,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-11-25 15:44:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:44:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-11-25 15:44:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-11-25 15:44:38,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858909066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:38,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:38,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8, 8] total 60 [2022-11-25 15:44:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594365387] [2022-11-25 15:44:38,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-25 15:44:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-25 15:44:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2308, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 15:44:38,095 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:48,500 INFO L93 Difference]: Finished difference Result 913 states and 1240 transitions. [2022-11-25 15:44:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-25 15:44:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-11-25 15:44:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:48,506 INFO L225 Difference]: With dead ends: 913 [2022-11-25 15:44:48,506 INFO L226 Difference]: Without dead ends: 855 [2022-11-25 15:44:48,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19097 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=17074, Invalid=42218, Unknown=0, NotChecked=0, Total=59292 [2022-11-25 15:44:48,527 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5281 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5281 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:48,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5281 Valid, 589 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 15:44:48,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-25 15:44:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 180. [2022-11-25 15:44:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-11-25 15:44:48,561 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 135 [2022-11-25 15:44:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:48,562 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-11-25 15:44:48,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-11-25 15:44:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-25 15:44:48,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:48,565 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:48,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:48,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:48,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1557114873, now seen corresponding path program 6 times [2022-11-25 15:44:48,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:48,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487217176] [2022-11-25 15:44:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-11-25 15:44:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487217176] [2022-11-25 15:44:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487217176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005720318] [2022-11-25 15:44:51,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:44:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:51,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:51,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:44:51,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-25 15:44:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:44:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-11-25 15:44:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-11-25 15:44:52,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005720318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:52,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:52,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 8, 8] total 61 [2022-11-25 15:44:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327892788] [2022-11-25 15:44:52,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-25 15:44:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-25 15:44:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1519, Invalid=2141, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 15:44:52,376 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:08,579 INFO L93 Difference]: Finished difference Result 1364 states and 1911 transitions. [2022-11-25 15:45:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2022-11-25 15:45:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-11-25 15:45:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:08,584 INFO L225 Difference]: With dead ends: 1364 [2022-11-25 15:45:08,585 INFO L226 Difference]: Without dead ends: 1232 [2022-11-25 15:45:08,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47559 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=27227, Invalid=96325, Unknown=0, NotChecked=0, Total=123552 [2022-11-25 15:45:08,600 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4478 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4478 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:08,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4478 Valid, 202 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:45:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-25 15:45:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 706. [2022-11-25 15:45:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.3574468085106384) internal successors, (957), 705 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 957 transitions. [2022-11-25 15:45:08,931 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 957 transitions. Word has length 176 [2022-11-25 15:45:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:08,932 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 957 transitions. [2022-11-25 15:45:08,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 957 transitions. [2022-11-25 15:45:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-11-25 15:45:08,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:08,950 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:08,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:45:09,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -658164028, now seen corresponding path program 7 times [2022-11-25 15:45:09,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:09,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603805412] [2022-11-25 15:45:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:09,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:45:14,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:14,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603805412] [2022-11-25 15:45:14,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603805412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:14,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162034319] [2022-11-25 15:45:14,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:45:14,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:14,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:14,975 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:14,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:45:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 15:45:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:45:15,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:45:19,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162034319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:19,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:19,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-11-25 15:45:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257387426] [2022-11-25 15:45:19,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:19,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-25 15:45:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-25 15:45:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 15:45:19,923 INFO L87 Difference]: Start difference. First operand 706 states and 957 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:45,266 INFO L93 Difference]: Finished difference Result 44922 states and 63580 transitions. [2022-11-25 15:45:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-25 15:45:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 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 683 [2022-11-25 15:45:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:45,412 INFO L225 Difference]: With dead ends: 44922 [2022-11-25 15:45:45,412 INFO L226 Difference]: Without dead ends: 44319 [2022-11-25 15:45:45,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 15:45:45,430 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4854 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4854 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:45,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4854 Valid, 998 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:45:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44319 states. [2022-11-25 15:45:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44319 to 810. [2022-11-25 15:45:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.311495673671199) internal successors, (1061), 809 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1061 transitions. [2022-11-25 15:45:46,781 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1061 transitions. Word has length 683 [2022-11-25 15:45:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:46,781 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1061 transitions. [2022-11-25 15:45:46,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1061 transitions. [2022-11-25 15:45:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-11-25 15:45:46,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:46,817 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 102, 102, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:46,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:45:47,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1077196708, now seen corresponding path program 8 times [2022-11-25 15:45:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386558259] [2022-11-25 15:45:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:45:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:59,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386558259] [2022-11-25 15:45:59,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386558259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842563513] [2022-11-25 15:45:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:45:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:59,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:59,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:46:00,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:46:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:46:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-25 15:46:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:46:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:46:15,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842563513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:46:15,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:46:15,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 209 [2022-11-25 15:46:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249053109] [2022-11-25 15:46:15,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:15,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-11-25 15:46:15,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-11-25 15:46:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2022-11-25 15:46:15,924 INFO L87 Difference]: Start difference. First operand 810 states and 1061 transitions. Second operand has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:48:28,851 INFO L93 Difference]: Finished difference Result 105970 states and 150056 transitions. [2022-11-25 15:48:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-11-25 15:48:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 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 787 [2022-11-25 15:48:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:48:29,178 INFO L225 Difference]: With dead ends: 105970 [2022-11-25 15:48:29,179 INFO L226 Difference]: Without dead ends: 105367 [2022-11-25 15:48:29,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1470 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2022-11-25 15:48:29,244 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12836 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12836 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:48:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12836 Valid, 2456 Invalid, 2147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [943 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 15:48:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105367 states. [2022-11-25 15:48:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105367 to 1018. [2022-11-25 15:48:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.247787610619469) internal successors, (1269), 1017 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1269 transitions. [2022-11-25 15:48:31,430 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1269 transitions. Word has length 787 [2022-11-25 15:48:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:48:31,431 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1269 transitions. [2022-11-25 15:48:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1269 transitions. [2022-11-25 15:48:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2022-11-25 15:48:31,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:48:31,443 INFO L195 NwaCegarLoop]: trace histogram [206, 206, 143, 143, 143, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:31,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:31,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:31,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:48:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash 994231180, now seen corresponding path program 9 times [2022-11-25 15:48:31,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:31,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682196456] [2022-11-25 15:48:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 0 proven. 42436 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-11-25 15:49:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682196456] [2022-11-25 15:49:13,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682196456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:13,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709102649] [2022-11-25 15:49:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:49:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:13,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a99e366-441f-4207-b9d5-34e9743fb680/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:49:13,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 15:49:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:49:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2022-11-25 15:49:14,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2022-11-25 15:49:16,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709102649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:16,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:16,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [209, 12, 12] total 228 [2022-11-25 15:49:16,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378464271] [2022-11-25 15:49:16,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:17,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-11-25 15:49:17,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-11-25 15:49:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23753, Invalid=28003, Unknown=0, NotChecked=0, Total=51756 [2022-11-25 15:49:17,017 INFO L87 Difference]: Start difference. First operand 1018 states and 1269 transitions. Second operand has 228 states, 228 states have (on average 2.1228070175438596) internal successors, (484), 228 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)