./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/up.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/up.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:05:09,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:05:09,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:05:09,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:05:09,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:05:09,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:05:09,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:05:09,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:05:09,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:05:09,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:05:09,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:05:09,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:05:09,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:05:09,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:05:09,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:05:09,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:05:09,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:05:09,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:05:09,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:05:09,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:05:09,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:05:09,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:05:09,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:05:09,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:05:10,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:05:10,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:05:10,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:05:10,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:05:10,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:05:10,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:05:10,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:05:10,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:05:10,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:05:10,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:05:10,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:05:10,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:05:10,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:05:10,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:05:10,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:05:10,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:05:10,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:05:10,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:05:10,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:05:10,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:05:10,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:05:10,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:05:10,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:05:10,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:05:10,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:05:10,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:05:10,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:05:10,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:05:10,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:05:10,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:05:10,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:05:10,039 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:05:10,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:05:10,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:05:10,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:05:10,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f [2021-12-06 22:05:10,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:05:10,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:05:10,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:05:10,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:05:10,222 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:05:10,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-invgen/up.i [2021-12-06 22:05:10,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/data/25dcab9f3/f068400b983b48409e4a69ef8a80fbae/FLAG28702dc1c [2021-12-06 22:05:10,650 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:05:10,650 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/sv-benchmarks/c/loop-invgen/up.i [2021-12-06 22:05:10,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/data/25dcab9f3/f068400b983b48409e4a69ef8a80fbae/FLAG28702dc1c [2021-12-06 22:05:10,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/data/25dcab9f3/f068400b983b48409e4a69ef8a80fbae [2021-12-06 22:05:10,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:05:10,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:05:10,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:05:10,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:05:10,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:05:10,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a172c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10, skipping insertion in model container [2021-12-06 22:05:10,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:05:10,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:05:10,786 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/sv-benchmarks/c/loop-invgen/up.i[893,906] [2021-12-06 22:05:10,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:05:10,799 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:05:10,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/sv-benchmarks/c/loop-invgen/up.i[893,906] [2021-12-06 22:05:10,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:05:10,820 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:05:10,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10 WrapperNode [2021-12-06 22:05:10,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:05:10,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:05:10,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:05:10,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:05:10,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,844 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-06 22:05:10,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:05:10,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:05:10,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:05:10,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:05:10,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:05:10,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:05:10,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:05:10,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:05:10,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (1/1) ... [2021-12-06 22:05:10,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:05:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:10,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:05:10,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:05:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:05:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:05:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:05:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:05:10,961 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:05:10,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:05:11,027 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:05:11,032 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:05:11,032 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:05:11,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:05:11 BoogieIcfgContainer [2021-12-06 22:05:11,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:05:11,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:05:11,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:05:11,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:05:11,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:05:10" (1/3) ... [2021-12-06 22:05:11,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e59627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:05:11, skipping insertion in model container [2021-12-06 22:05:11,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:05:10" (2/3) ... [2021-12-06 22:05:11,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e59627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:05:11, skipping insertion in model container [2021-12-06 22:05:11,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:05:11" (3/3) ... [2021-12-06 22:05:11,041 INFO L111 eAbstractionObserver]: Analyzing ICFG up.i [2021-12-06 22:05:11,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:05:11,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:05:11,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:05:11,087 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:05:11,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:05:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:05:11,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:11,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:11,104 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2021-12-06 22:05:11,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892377327] [2021-12-06 22:05:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:11,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:11,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:11,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892377327] [2021-12-06 22:05:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892377327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:11,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:11,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:05:11,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008223851] [2021-12-06 22:05:11,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:11,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:05:11,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:05:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:05:11,319 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:11,369 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2021-12-06 22:05:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:05:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 22:05:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:11,379 INFO L225 Difference]: With dead ends: 27 [2021-12-06 22:05:11,379 INFO L226 Difference]: Without dead ends: 10 [2021-12-06 22:05:11,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:05:11,386 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:11,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-06 22:05:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-06 22:05:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-06 22:05:11,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-12-06 22:05:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:11,419 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-06 22:05:11,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-06 22:05:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 22:05:11,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:11,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:11,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:05:11,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2021-12-06 22:05:11,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:11,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555496677] [2021-12-06 22:05:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:11,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:11,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555496677] [2021-12-06 22:05:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555496677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760151868] [2021-12-06 22:05:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:11,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:11,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:11,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:11,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:05:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 22:05:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:11,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:05:11,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760151868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:11,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:05:11,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-06 22:05:11,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268800855] [2021-12-06 22:05:11,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:11,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:05:11,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:05:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:05:11,571 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:11,602 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-12-06 22:05:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:05:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 22:05:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:11,603 INFO L225 Difference]: With dead ends: 20 [2021-12-06 22:05:11,604 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 22:05:11,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:05:11,606 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:11,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 22:05:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2021-12-06 22:05:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-06 22:05:11,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-06 22:05:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:11,611 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-06 22:05:11,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-06 22:05:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:05:11,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:11,612 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:11,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:11,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2021-12-06 22:05:11,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071531151] [2021-12-06 22:05:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:11,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071531151] [2021-12-06 22:05:12,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071531151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450639252] [2021-12-06 22:05:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:12,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:12,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:12,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:12,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:05:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:05:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450639252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:12,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:12,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 22:05:12,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746965474] [2021-12-06 22:05:12,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:12,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:05:12,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:05:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:05:12,140 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-12-06 22:05:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:12,176 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-12-06 22:05:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:05:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11 [2021-12-06 22:05:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:12,177 INFO L225 Difference]: With dead ends: 23 [2021-12-06 22:05:12,177 INFO L226 Difference]: Without dead ends: 13 [2021-12-06 22:05:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:12,178 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:12,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-06 22:05:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-06 22:05:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-06 22:05:12,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-12-06 22:05:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:12,182 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-06 22:05:12,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-12-06 22:05:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-06 22:05:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:05:12,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:12,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:12,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:05:12,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:12,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2021-12-06 22:05:12,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758874386] [2021-12-06 22:05:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:12,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758874386] [2021-12-06 22:05:12,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758874386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659016267] [2021-12-06 22:05:12,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:12,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:12,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:12,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:05:12,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:05:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:12,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659016267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:12,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:12,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-12-06 22:05:12,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687390065] [2021-12-06 22:05:12,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:12,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:05:12,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:05:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:05:12,644 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:12,680 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-06 22:05:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:05:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-12-06 22:05:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:12,681 INFO L225 Difference]: With dead ends: 24 [2021-12-06 22:05:12,681 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 22:05:12,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:05:12,682 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:12,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 22:05:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2021-12-06 22:05:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-06 22:05:12,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-12-06 22:05:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:12,686 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-06 22:05:12,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-06 22:05:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 22:05:12,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:12,686 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:12,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:05:12,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:12,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2021-12-06 22:05:12,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285288524] [2021-12-06 22:05:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:12,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285288524] [2021-12-06 22:05:13,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285288524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465293479] [2021-12-06 22:05:13,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:13,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:13,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:13,146 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:13,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:05:13,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:05:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:05:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465293479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:13,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:13,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 22:05:13,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188908002] [2021-12-06 22:05:13,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:13,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:05:13,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:05:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:13,268 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:13,312 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-06 22:05:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:05:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-12-06 22:05:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:13,313 INFO L225 Difference]: With dead ends: 30 [2021-12-06 22:05:13,313 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 22:05:13,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:05:13,314 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:13,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 22:05:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 22:05:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-06 22:05:13,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-12-06 22:05:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-06 22:05:13,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-06 22:05:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:05:13,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:13,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:13,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:05:13,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:13,520 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2021-12-06 22:05:13,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:13,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117692536] [2021-12-06 22:05:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:13,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117692536] [2021-12-06 22:05:13,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117692536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488313417] [2021-12-06 22:05:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:13,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:13,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:13,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:05:13,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:13,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:13,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:05:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:13,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488313417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:13,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:13,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-06 22:05:13,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130531760] [2021-12-06 22:05:13,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:13,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:05:13,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:05:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:05:13,751 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:13,800 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-06 22:05:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:05:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2021-12-06 22:05:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:13,801 INFO L225 Difference]: With dead ends: 28 [2021-12-06 22:05:13,801 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 22:05:13,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:13,802 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:13,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 22:05:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-12-06 22:05:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-12-06 22:05:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-06 22:05:13,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-12-06 22:05:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-06 22:05:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-06 22:05:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:05:13,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:13,807 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:13,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:05:14,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:05:14,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2021-12-06 22:05:14,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796769150] [2021-12-06 22:05:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:14,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796769150] [2021-12-06 22:05:14,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796769150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516469096] [2021-12-06 22:05:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:14,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:14,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:14,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:14,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:05:14,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:05:14,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:05:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516469096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:14,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 22:05:14,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753935113] [2021-12-06 22:05:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:05:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:05:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:05:14,496 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:14,545 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-06 22:05:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:05:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 19 [2021-12-06 22:05:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:14,546 INFO L225 Difference]: With dead ends: 37 [2021-12-06 22:05:14,546 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 22:05:14,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:05:14,547 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:14,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 22:05:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 22:05:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2021-12-06 22:05:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-06 22:05:14,550 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-12-06 22:05:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-06 22:05:14,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-06 22:05:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:05:14,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:14,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:14,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:05:14,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:14,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2021-12-06 22:05:14,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:14,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990137315] [2021-12-06 22:05:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:14,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990137315] [2021-12-06 22:05:14,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990137315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:14,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835128631] [2021-12-06 22:05:14,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:14,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:14,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:14,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:14,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:05:14,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:05:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:05:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:14,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835128631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:14,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:14,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-12-06 22:05:14,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061258707] [2021-12-06 22:05:14,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:14,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:05:14,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:05:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:05:14,931 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:14,984 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-12-06 22:05:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:05:14,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 20 [2021-12-06 22:05:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:14,985 INFO L225 Difference]: With dead ends: 32 [2021-12-06 22:05:14,985 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 22:05:14,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:05:14,986 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:14,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 23 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 22:05:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-06 22:05:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2021-12-06 22:05:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-06 22:05:14,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-12-06 22:05:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:14,990 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-06 22:05:14,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-06 22:05:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:05:14,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:14,991 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:15,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:05:15,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:15,193 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2021-12-06 22:05:15,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:15,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073196441] [2021-12-06 22:05:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:15,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073196441] [2021-12-06 22:05:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073196441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323852159] [2021-12-06 22:05:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:15,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:15,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:05:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:05:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323852159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:15,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 22:05:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046150775] [2021-12-06 22:05:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:15,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:15,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:15,459 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:15,534 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-06 22:05:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:05:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 22:05:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:15,535 INFO L225 Difference]: With dead ends: 44 [2021-12-06 22:05:15,535 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 22:05:15,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:05:15,536 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:15,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 22:05:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-06 22:05:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-06 22:05:15,540 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-12-06 22:05:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:15,540 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-06 22:05:15,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-06 22:05:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 22:05:15,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:15,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:15,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:05:15,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 22:05:15,742 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2021-12-06 22:05:15,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:15,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197610646] [2021-12-06 22:05:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:15,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197610646] [2021-12-06 22:05:15,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197610646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071596833] [2021-12-06 22:05:15,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:15,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:15,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:15,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:15,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:05:15,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:05:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071596833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:15,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:15,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-06 22:05:15,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815529095] [2021-12-06 22:05:15,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:05:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:05:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:05:15,904 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:15,969 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-06 22:05:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:05:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-12-06 22:05:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:15,970 INFO L225 Difference]: With dead ends: 36 [2021-12-06 22:05:15,970 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 22:05:15,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:05:15,971 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:15,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 22:05:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-12-06 22:05:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-06 22:05:15,974 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-12-06 22:05:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:15,974 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-06 22:05:15,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-06 22:05:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:05:15,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:15,975 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:15,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:05:16,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:05:16,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2021-12-06 22:05:16,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:16,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098110215] [2021-12-06 22:05:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:16,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:16,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098110215] [2021-12-06 22:05:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098110215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769438846] [2021-12-06 22:05:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:16,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:16,320 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:16,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:05:16,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 22:05:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:05:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:16,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:16,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769438846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:16,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:16,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-06 22:05:16,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714290438] [2021-12-06 22:05:16,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:05:16,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:05:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:05:16,510 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:16,584 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-06 22:05:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:05:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 22:05:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:16,585 INFO L225 Difference]: With dead ends: 51 [2021-12-06 22:05:16,585 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 22:05:16,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:05:16,586 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:16,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 22:05:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 22:05:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-06 22:05:16,591 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-12-06 22:05:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-06 22:05:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-06 22:05:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 22:05:16,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:16,592 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:16,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:05:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:05:16,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2021-12-06 22:05:16,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694360703] [2021-12-06 22:05:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:16,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:16,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694360703] [2021-12-06 22:05:16,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694360703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748631208] [2021-12-06 22:05:16,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:16,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:16,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:16,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:05:16,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:05:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:17,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748631208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:17,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:17,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-06 22:05:17,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743747909] [2021-12-06 22:05:17,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:17,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:05:17,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:05:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:05:17,094 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-12-06 22:05:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:17,156 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-12-06 22:05:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:05:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) Word has length 28 [2021-12-06 22:05:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:17,157 INFO L225 Difference]: With dead ends: 40 [2021-12-06 22:05:17,157 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 22:05:17,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:17,158 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:17,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 22:05:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-06 22:05:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2021-12-06 22:05:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-06 22:05:17,162 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-12-06 22:05:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-06 22:05:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-12-06 22:05:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-06 22:05:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 22:05:17,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:17,163 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:17,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:17,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:05:17,364 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2021-12-06 22:05:17,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:17,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857303256] [2021-12-06 22:05:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:17,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:17,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857303256] [2021-12-06 22:05:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857303256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207604132] [2021-12-06 22:05:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:17,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:17,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:17,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:05:17,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:05:17,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:05:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:17,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207604132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:17,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:17,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-06 22:05:17,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649322118] [2021-12-06 22:05:17,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:17,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:05:17,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:05:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:05:17,780 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:17,862 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-06 22:05:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:05:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 22:05:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:17,862 INFO L225 Difference]: With dead ends: 58 [2021-12-06 22:05:17,863 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 22:05:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:05:17,864 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:17,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 22:05:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 22:05:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-06 22:05:17,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-12-06 22:05:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:17,867 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-06 22:05:17,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-06 22:05:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 22:05:17,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:17,868 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:17,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:05:18,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 22:05:18,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2021-12-06 22:05:18,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968488074] [2021-12-06 22:05:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:18,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968488074] [2021-12-06 22:05:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968488074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537592885] [2021-12-06 22:05:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:18,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:18,253 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:18,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:05:18,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 22:05:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 22:05:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537592885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:18,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:18,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2021-12-06 22:05:18,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411527183] [2021-12-06 22:05:18,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:05:18,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:05:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:05:18,362 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:18,423 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-06 22:05:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:05:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-12-06 22:05:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:18,424 INFO L225 Difference]: With dead ends: 44 [2021-12-06 22:05:18,424 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 22:05:18,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:05:18,425 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:18,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 22:05:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-06 22:05:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-06 22:05:18,430 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-12-06 22:05:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:18,430 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-06 22:05:18,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-06 22:05:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 22:05:18,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:18,431 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:18,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:05:18,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:18,633 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2021-12-06 22:05:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:18,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045333689] [2021-12-06 22:05:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:18,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045333689] [2021-12-06 22:05:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045333689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41505459] [2021-12-06 22:05:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:18,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:18,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:18,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:05:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:05:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:18,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41505459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:18,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:18,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-06 22:05:18,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616455244] [2021-12-06 22:05:18,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:18,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:05:18,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:05:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:05:18,969 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:19,058 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-12-06 22:05:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:05:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 22:05:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:19,058 INFO L225 Difference]: With dead ends: 65 [2021-12-06 22:05:19,059 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 22:05:19,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:05:19,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:19,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 22:05:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 22:05:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-06 22:05:19,063 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-12-06 22:05:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:19,063 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-06 22:05:19,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-06 22:05:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:05:19,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:19,064 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:19,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:05:19,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:19,265 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2021-12-06 22:05:19,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:19,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462730405] [2021-12-06 22:05:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:19,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:19,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:19,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462730405] [2021-12-06 22:05:19,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462730405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:19,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052802252] [2021-12-06 22:05:19,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:19,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:19,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:19,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:19,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:05:19,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:19,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:19,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 22:05:19,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:19,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052802252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:19,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:19,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2021-12-06 22:05:19,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310035067] [2021-12-06 22:05:19,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:19,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:05:19,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:05:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:19,471 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:19,553 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-06 22:05:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 22:05:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 36 [2021-12-06 22:05:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:19,553 INFO L225 Difference]: With dead ends: 48 [2021-12-06 22:05:19,554 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 22:05:19,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:05:19,554 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:19,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 22:05:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-12-06 22:05:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-06 22:05:19,558 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-12-06 22:05:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:19,558 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-06 22:05:19,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-06 22:05:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 22:05:19,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:19,559 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:19,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:05:19,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:05:19,759 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2021-12-06 22:05:19,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322219532] [2021-12-06 22:05:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:19,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:19,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322219532] [2021-12-06 22:05:19,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322219532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:19,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578951613] [2021-12-06 22:05:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:19,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:19,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:19,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:05:19,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 22:05:19,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 22:05:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:20,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:20,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578951613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:20,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-06 22:05:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638050221] [2021-12-06 22:05:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:20,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:05:20,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:05:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:05:20,132 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:20,240 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-12-06 22:05:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:05:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 39 [2021-12-06 22:05:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:20,240 INFO L225 Difference]: With dead ends: 72 [2021-12-06 22:05:20,241 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 22:05:20,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:05:20,242 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:20,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 22:05:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-06 22:05:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-06 22:05:20,245 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2021-12-06 22:05:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:20,245 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-06 22:05:20,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-06 22:05:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 22:05:20,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:20,246 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:20,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:05:20,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2021-12-06 22:05:20,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953888091] [2021-12-06 22:05:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:20,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:20,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953888091] [2021-12-06 22:05:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953888091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66234256] [2021-12-06 22:05:20,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:20,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:20,546 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:20,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:05:20,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:20,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 22:05:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:20,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66234256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:20,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2021-12-06 22:05:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124229678] [2021-12-06 22:05:20,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:20,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 22:05:20,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 22:05:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:05:20,678 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:20,767 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-06 22:05:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:05:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 22:05:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:20,767 INFO L225 Difference]: With dead ends: 52 [2021-12-06 22:05:20,767 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 22:05:20,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:05:20,768 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:20,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 22:05:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-12-06 22:05:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-12-06 22:05:20,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2021-12-06 22:05:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:20,773 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-12-06 22:05:20,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-12-06 22:05:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:05:20,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:20,773 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:20,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:05:20,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:05:20,975 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2021-12-06 22:05:20,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:20,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13816590] [2021-12-06 22:05:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:20,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:21,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13816590] [2021-12-06 22:05:21,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13816590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994250702] [2021-12-06 22:05:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:21,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:21,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:21,143 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:21,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:05:21,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 22:05:21,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 22:05:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:21,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:21,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994250702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:21,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:21,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-12-06 22:05:21,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182373229] [2021-12-06 22:05:21,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:21,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:05:21,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:05:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:05:21,413 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:21,533 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-12-06 22:05:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 22:05:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 22:05:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:21,533 INFO L225 Difference]: With dead ends: 79 [2021-12-06 22:05:21,533 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:05:21,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:05:21,535 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:21,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:05:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 22:05:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2021-12-06 22:05:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-06 22:05:21,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-12-06 22:05:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:21,540 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-06 22:05:21,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-06 22:05:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 22:05:21,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:21,540 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:21,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:05:21,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:21,742 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2021-12-06 22:05:21,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050740774] [2021-12-06 22:05:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:21,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:21,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:21,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050740774] [2021-12-06 22:05:21,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050740774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537378626] [2021-12-06 22:05:21,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:21,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:21,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:21,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:05:21,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 22:05:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 22:05:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:21,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:22,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537378626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:22,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:22,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2021-12-06 22:05:22,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295024967] [2021-12-06 22:05:22,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:22,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:05:22,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:22,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:05:22,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:05:22,022 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:22,119 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-06 22:05:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:05:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 22:05:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:22,119 INFO L225 Difference]: With dead ends: 56 [2021-12-06 22:05:22,120 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 22:05:22,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:05:22,120 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:22,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 22:05:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-06 22:05:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-06 22:05:22,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-12-06 22:05:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:22,124 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-06 22:05:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-06 22:05:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 22:05:22,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:22,125 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:22,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:05:22,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:22,327 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:22,328 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2021-12-06 22:05:22,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:22,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422618564] [2021-12-06 22:05:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:22,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:22,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422618564] [2021-12-06 22:05:22,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422618564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141788641] [2021-12-06 22:05:22,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:22,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:22,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:22,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:22,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:05:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:05:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:22,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:22,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141788641] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:22,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:22,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-12-06 22:05:22,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473192976] [2021-12-06 22:05:22,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:22,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:05:22,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:05:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:05:22,781 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:22,916 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-12-06 22:05:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:05:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 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 47 [2021-12-06 22:05:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:22,917 INFO L225 Difference]: With dead ends: 86 [2021-12-06 22:05:22,917 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:05:22,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:05:22,919 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:22,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:05:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 22:05:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-06 22:05:22,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2021-12-06 22:05:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:22,924 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-06 22:05:22,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-06 22:05:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 22:05:22,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:22,924 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:22,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:23,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:05:23,126 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2021-12-06 22:05:23,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:23,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960239075] [2021-12-06 22:05:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:23,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:23,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:23,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960239075] [2021-12-06 22:05:23,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960239075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:23,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895571660] [2021-12-06 22:05:23,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:23,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:23,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:05:23,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 22:05:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:23,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:23,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895571660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:23,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:23,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2021-12-06 22:05:23,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978560215] [2021-12-06 22:05:23,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:23,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:05:23,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:05:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:05:23,391 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:23,495 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-12-06 22:05:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:05:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 22:05:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:23,496 INFO L225 Difference]: With dead ends: 60 [2021-12-06 22:05:23,496 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 22:05:23,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:05:23,497 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:23,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:05:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 22:05:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-06 22:05:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-06 22:05:23,501 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-12-06 22:05:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:23,501 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-06 22:05:23,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-06 22:05:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 22:05:23,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:23,501 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:23,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 22:05:23,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:23,702 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2021-12-06 22:05:23,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458687761] [2021-12-06 22:05:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:23,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:23,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458687761] [2021-12-06 22:05:23,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458687761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996330174] [2021-12-06 22:05:23,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:23,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:23,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:05:23,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 22:05:23,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 22:05:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:24,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:24,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996330174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:24,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-12-06 22:05:24,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846942464] [2021-12-06 22:05:24,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:24,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 22:05:24,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 22:05:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:05:24,269 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:24,416 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-06 22:05:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:05:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2021-12-06 22:05:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:24,416 INFO L225 Difference]: With dead ends: 93 [2021-12-06 22:05:24,416 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:05:24,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 22:05:24,418 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:24,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 152 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:05:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 22:05:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-06 22:05:24,422 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2021-12-06 22:05:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:24,422 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-06 22:05:24,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-06 22:05:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 22:05:24,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:24,423 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:24,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:05:24,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:24,624 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2021-12-06 22:05:24,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:24,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265583033] [2021-12-06 22:05:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:24,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:24,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265583033] [2021-12-06 22:05:24,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265583033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535330466] [2021-12-06 22:05:24,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:24,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:24,744 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:24,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:05:24,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:05:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:24,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:24,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535330466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:24,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:24,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2021-12-06 22:05:24,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45807036] [2021-12-06 22:05:24,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:24,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 22:05:24,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 22:05:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:05:24,901 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:25,014 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-12-06 22:05:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:05:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 22:05:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:25,015 INFO L225 Difference]: With dead ends: 64 [2021-12-06 22:05:25,015 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:05:25,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:05:25,016 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:25,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:05:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-12-06 22:05:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-06 22:05:25,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2021-12-06 22:05:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:25,020 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-06 22:05:25,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-06 22:05:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:05:25,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:25,020 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:25,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:05:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 22:05:25,222 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2021-12-06 22:05:25,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366371869] [2021-12-06 22:05:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:25,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366371869] [2021-12-06 22:05:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366371869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836523931] [2021-12-06 22:05:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:25,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:25,436 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:25,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:05:25,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 22:05:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:05:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:25,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:25,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836523931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:25,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:25,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-12-06 22:05:25,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042622709] [2021-12-06 22:05:25,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:25,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:05:25,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:05:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:05:25,805 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:25,963 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-06 22:05:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:05:25,963 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 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 55 [2021-12-06 22:05:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:25,964 INFO L225 Difference]: With dead ends: 100 [2021-12-06 22:05:25,964 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 22:05:25,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 22:05:25,965 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:25,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 22:05:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 22:05:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-12-06 22:05:25,971 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2021-12-06 22:05:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:25,971 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-12-06 22:05:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-12-06 22:05:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 22:05:25,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:25,972 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:25,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 22:05:26,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:05:26,173 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2021-12-06 22:05:26,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895257666] [2021-12-06 22:05:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:26,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:26,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895257666] [2021-12-06 22:05:26,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895257666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332518812] [2021-12-06 22:05:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:26,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:26,311 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:26,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:05:26,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 22:05:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 22:05:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:26,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:26,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332518812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:26,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:26,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2021-12-06 22:05:26,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973116976] [2021-12-06 22:05:26,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:26,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:05:26,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:05:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:05:26,474 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:26,600 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-12-06 22:05:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:05:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 22:05:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:26,601 INFO L225 Difference]: With dead ends: 68 [2021-12-06 22:05:26,601 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 22:05:26,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:05:26,602 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:26,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 26 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 22:05:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-06 22:05:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-06 22:05:26,606 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2021-12-06 22:05:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-06 22:05:26,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-06 22:05:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 22:05:26,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:26,607 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:26,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:05:26,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:05:26,808 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2021-12-06 22:05:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892995280] [2021-12-06 22:05:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:26,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:26,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892995280] [2021-12-06 22:05:26,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892995280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841448736] [2021-12-06 22:05:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:26,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:27,000 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:27,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:05:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 22:05:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841448736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:27,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:27,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-12-06 22:05:27,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470022598] [2021-12-06 22:05:27,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:27,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 22:05:27,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 22:05:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:05:27,391 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:27,566 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-06 22:05:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:05:27,566 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 22:05:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:27,566 INFO L225 Difference]: With dead ends: 107 [2021-12-06 22:05:27,566 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 22:05:27,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:05:27,568 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:27,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 22:05:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-06 22:05:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-12-06 22:05:27,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2021-12-06 22:05:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:27,572 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-12-06 22:05:27,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-12-06 22:05:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 22:05:27,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:27,573 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:27,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 22:05:27,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 22:05:27,774 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2021-12-06 22:05:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652725240] [2021-12-06 22:05:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:27,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:27,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652725240] [2021-12-06 22:05:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652725240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854642520] [2021-12-06 22:05:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:27,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:27,891 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:27,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:05:27,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 22:05:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:27,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854642520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:28,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:28,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2021-12-06 22:05:28,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327367934] [2021-12-06 22:05:28,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:28,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:28,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:28,070 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:28,200 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-12-06 22:05:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 22:05:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 22:05:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:28,201 INFO L225 Difference]: With dead ends: 72 [2021-12-06 22:05:28,202 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 22:05:28,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:05:28,203 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:28,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 30 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 22:05:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-12-06 22:05:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-06 22:05:28,210 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2021-12-06 22:05:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-06 22:05:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-06 22:05:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 22:05:28,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:28,211 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:28,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 22:05:28,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:05:28,412 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2021-12-06 22:05:28,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550077842] [2021-12-06 22:05:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:28,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:28,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550077842] [2021-12-06 22:05:28,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550077842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047972317] [2021-12-06 22:05:28,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:28,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:28,627 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:05:28,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 22:05:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 22:05:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:28,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047972317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:29,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:29,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-12-06 22:05:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602780588] [2021-12-06 22:05:29,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:05:29,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:05:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:05:29,055 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:29,268 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-12-06 22:05:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:05:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 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 63 [2021-12-06 22:05:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:29,269 INFO L225 Difference]: With dead ends: 114 [2021-12-06 22:05:29,269 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 22:05:29,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:05:29,270 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:29,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 147 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 22:05:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-06 22:05:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-06 22:05:29,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2021-12-06 22:05:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:29,275 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-06 22:05:29,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-06 22:05:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 22:05:29,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:29,276 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:29,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 22:05:29,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:29,477 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2021-12-06 22:05:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:29,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100160532] [2021-12-06 22:05:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:29,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:29,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100160532] [2021-12-06 22:05:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100160532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658161326] [2021-12-06 22:05:29,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:29,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:29,610 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:29,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:05:29,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:29,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:29,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 22:05:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:29,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:29,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658161326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:29,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:29,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-12-06 22:05:29,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665025192] [2021-12-06 22:05:29,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:29,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:05:29,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:05:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:05:29,790 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:29,943 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-06 22:05:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:05:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 22:05:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:29,944 INFO L225 Difference]: With dead ends: 76 [2021-12-06 22:05:29,944 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 22:05:29,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:05:29,945 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:29,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 22:05:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-06 22:05:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-06 22:05:29,950 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2021-12-06 22:05:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-06 22:05:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-06 22:05:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 22:05:29,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:29,951 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:29,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 22:05:30,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:30,152 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2021-12-06 22:05:30,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:30,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488498577] [2021-12-06 22:05:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:30,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:30,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488498577] [2021-12-06 22:05:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488498577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820660065] [2021-12-06 22:05:30,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:30,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:30,447 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:30,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 22:05:30,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 22:05:30,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:30,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 22:05:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:30,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:30,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820660065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:30,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:30,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-12-06 22:05:30,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111591210] [2021-12-06 22:05:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:30,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:05:30,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:05:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:05:30,926 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:31,145 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-12-06 22:05:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 22:05:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 22:05:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:31,146 INFO L225 Difference]: With dead ends: 121 [2021-12-06 22:05:31,146 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 22:05:31,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 22:05:31,147 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:31,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 192 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 22:05:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 22:05:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-06 22:05:31,152 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2021-12-06 22:05:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:31,153 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-06 22:05:31,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-06 22:05:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 22:05:31,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:31,153 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:31,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 22:05:31,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:31,355 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2021-12-06 22:05:31,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:31,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23668883] [2021-12-06 22:05:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:31,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:31,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23668883] [2021-12-06 22:05:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23668883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070262130] [2021-12-06 22:05:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:31,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:31,523 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:31,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 22:05:31,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 22:05:31,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:05:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:31,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:31,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070262130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:31,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:31,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2021-12-06 22:05:31,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233973129] [2021-12-06 22:05:31,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:31,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:05:31,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:05:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:05:31,729 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:31,878 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-06 22:05:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:05:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 22:05:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:31,879 INFO L225 Difference]: With dead ends: 80 [2021-12-06 22:05:31,879 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 22:05:31,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:05:31,880 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:31,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 22:05:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-12-06 22:05:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-06 22:05:31,889 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2021-12-06 22:05:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:31,889 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-06 22:05:31,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-06 22:05:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 22:05:31,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:31,890 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:31,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 22:05:32,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:32,091 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2021-12-06 22:05:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:32,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051319340] [2021-12-06 22:05:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:32,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:32,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:32,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051319340] [2021-12-06 22:05:32,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051319340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:32,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941347983] [2021-12-06 22:05:32,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:32,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:32,367 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:32,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 22:05:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 22:05:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:32,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941347983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:32,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:32,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2021-12-06 22:05:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705666294] [2021-12-06 22:05:32,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:32,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 22:05:32,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 22:05:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 22:05:32,928 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:33,212 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-12-06 22:05:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:05:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 22:05:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:33,213 INFO L225 Difference]: With dead ends: 128 [2021-12-06 22:05:33,213 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 22:05:33,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1223, Invalid=4179, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:05:33,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:33,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 185 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 22:05:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-06 22:05:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-12-06 22:05:33,219 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2021-12-06 22:05:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-12-06 22:05:33,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-12-06 22:05:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 22:05:33,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:33,221 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:33,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 22:05:33,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 22:05:33,422 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2021-12-06 22:05:33,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678765289] [2021-12-06 22:05:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:33,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:33,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678765289] [2021-12-06 22:05:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678765289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:33,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565378644] [2021-12-06 22:05:33,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:33,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:33,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:33,558 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:33,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 22:05:33,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 22:05:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:33,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:33,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565378644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:33,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:33,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2021-12-06 22:05:33,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021892149] [2021-12-06 22:05:33,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:33,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:05:33,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:05:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:05:33,737 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:33,874 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-12-06 22:05:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:05:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 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 72 [2021-12-06 22:05:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:33,875 INFO L225 Difference]: With dead ends: 84 [2021-12-06 22:05:33,875 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 22:05:33,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:05:33,875 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:33,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 22:05:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-06 22:05:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-12-06 22:05:33,881 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2021-12-06 22:05:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:33,881 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-12-06 22:05:33,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-12-06 22:05:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 22:05:33,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:33,882 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:33,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 22:05:34,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 22:05:34,083 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2021-12-06 22:05:34,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933817829] [2021-12-06 22:05:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:34,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:34,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:34,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933817829] [2021-12-06 22:05:34,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933817829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:34,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827682369] [2021-12-06 22:05:34,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:34,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:34,432 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:34,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 22:05:34,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-06 22:05:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 22:05:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:34,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:34,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827682369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:34,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:34,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2021-12-06 22:05:34,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030187045] [2021-12-06 22:05:34,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:34,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:05:34,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:05:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 22:05:34,957 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:35,209 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-12-06 22:05:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:05:35,209 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 22:05:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:35,210 INFO L225 Difference]: With dead ends: 135 [2021-12-06 22:05:35,210 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 22:05:35,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:05:35,211 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:35,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 206 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 22:05:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-06 22:05:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-06 22:05:35,216 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2021-12-06 22:05:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:35,217 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-06 22:05:35,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-06 22:05:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 22:05:35,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:35,217 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:35,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 22:05:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 22:05:35,418 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2021-12-06 22:05:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:35,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484096841] [2021-12-06 22:05:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:35,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:35,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484096841] [2021-12-06 22:05:35,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484096841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550751549] [2021-12-06 22:05:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:35,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:35,573 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:35,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 22:05:35,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 22:05:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:35,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550751549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:35,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:35,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2021-12-06 22:05:35,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988803694] [2021-12-06 22:05:35,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:05:35,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:05:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:05:35,780 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:35,953 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-12-06 22:05:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:05:35,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2021-12-06 22:05:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:35,954 INFO L225 Difference]: With dead ends: 88 [2021-12-06 22:05:35,954 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 22:05:35,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:05:35,955 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:35,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 31 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 22:05:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-06 22:05:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-12-06 22:05:35,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2021-12-06 22:05:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:35,961 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-12-06 22:05:35,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-12-06 22:05:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 22:05:35,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:35,962 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:35,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 22:05:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:36,162 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2021-12-06 22:05:36,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:36,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816859958] [2021-12-06 22:05:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:36,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:36,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816859958] [2021-12-06 22:05:36,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816859958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125969255] [2021-12-06 22:05:36,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:36,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:36,487 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:36,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 22:05:36,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-06 22:05:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 22:05:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:37,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:37,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125969255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:37,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:37,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2021-12-06 22:05:37,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568212241] [2021-12-06 22:05:37,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 22:05:37,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 22:05:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:05:37,117 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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) [2021-12-06 22:05:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:37,432 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-12-06 22:05:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:05:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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 79 [2021-12-06 22:05:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:37,433 INFO L225 Difference]: With dead ends: 142 [2021-12-06 22:05:37,433 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 22:05:37,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 22:05:37,434 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:37,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 235 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 22:05:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-06 22:05:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-12-06 22:05:37,440 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2021-12-06 22:05:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:37,441 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-12-06 22:05:37,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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) [2021-12-06 22:05:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-12-06 22:05:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 22:05:37,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:37,441 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:37,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 22:05:37,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 22:05:37,642 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2021-12-06 22:05:37,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:37,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202573233] [2021-12-06 22:05:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:37,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:37,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:37,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202573233] [2021-12-06 22:05:37,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202573233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:37,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91819404] [2021-12-06 22:05:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:37,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:37,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:37,807 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:37,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 22:05:37,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 22:05:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 22:05:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:38,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91819404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:38,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:38,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2021-12-06 22:05:38,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074459204] [2021-12-06 22:05:38,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:38,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 22:05:38,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 22:05:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:05:38,037 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:38,213 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-06 22:05:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:05:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 80 [2021-12-06 22:05:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:38,214 INFO L225 Difference]: With dead ends: 92 [2021-12-06 22:05:38,214 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 22:05:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:05:38,215 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 23 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 22:05:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-12-06 22:05:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-06 22:05:38,222 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2021-12-06 22:05:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-06 22:05:38,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-06 22:05:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 22:05:38,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:38,222 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:38,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:38,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:38,423 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2021-12-06 22:05:38,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040732574] [2021-12-06 22:05:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:38,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:38,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040732574] [2021-12-06 22:05:38,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040732574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018539884] [2021-12-06 22:05:38,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:38,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:38,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:38,835 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 22:05:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 22:05:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:39,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018539884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:39,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:39,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2021-12-06 22:05:39,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422821573] [2021-12-06 22:05:39,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 22:05:39,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 22:05:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:05:39,491 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:39,818 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-12-06 22:05:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:05:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 22:05:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:39,819 INFO L225 Difference]: With dead ends: 149 [2021-12-06 22:05:39,819 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 22:05:39,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 22:05:39,820 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:39,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 210 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 22:05:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 22:05:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-06 22:05:39,831 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2021-12-06 22:05:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-06 22:05:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-06 22:05:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 22:05:39,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:39,831 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:39,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 22:05:40,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 22:05:40,033 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2021-12-06 22:05:40,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340034902] [2021-12-06 22:05:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:40,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:40,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340034902] [2021-12-06 22:05:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340034902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59690591] [2021-12-06 22:05:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:40,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:40,223 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:40,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 22:05:40,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 22:05:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:40,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:40,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59690591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:40,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:40,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2021-12-06 22:05:40,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987621623] [2021-12-06 22:05:40,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:40,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:05:40,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:05:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:05:40,445 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:40,637 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-12-06 22:05:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 22:05:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 22:05:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:40,637 INFO L225 Difference]: With dead ends: 96 [2021-12-06 22:05:40,637 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 22:05:40,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:05:40,638 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:40,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 27 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 22:05:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-12-06 22:05:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-06 22:05:40,645 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2021-12-06 22:05:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:40,645 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-06 22:05:40,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-06 22:05:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 22:05:40,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:40,646 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:40,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 22:05:40,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 22:05:40,846 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2021-12-06 22:05:40,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647523517] [2021-12-06 22:05:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:40,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:41,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647523517] [2021-12-06 22:05:41,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647523517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819634812] [2021-12-06 22:05:41,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:41,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:41,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:41,221 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:41,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 22:05:41,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-12-06 22:05:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 22:05:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:41,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:41,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819634812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:41,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:41,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2021-12-06 22:05:41,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864100138] [2021-12-06 22:05:41,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:41,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 22:05:41,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:41,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 22:05:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:05:41,866 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:42,189 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-06 22:05:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:05:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 22:05:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:42,189 INFO L225 Difference]: With dead ends: 156 [2021-12-06 22:05:42,189 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 22:05:42,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1801, Invalid=6209, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 22:05:42,191 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:42,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 243 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 22:05:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 22:05:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-06 22:05:42,198 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2021-12-06 22:05:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:42,198 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-06 22:05:42,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-06 22:05:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 22:05:42,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:42,198 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:42,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 22:05:42,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:42,400 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2021-12-06 22:05:42,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377008876] [2021-12-06 22:05:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:42,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:42,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:42,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377008876] [2021-12-06 22:05:42,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377008876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:42,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370553076] [2021-12-06 22:05:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:42,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:42,618 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 22:05:42,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:42,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 22:05:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:42,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:42,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370553076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:42,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:42,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2021-12-06 22:05:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256908661] [2021-12-06 22:05:42,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:42,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 22:05:42,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 22:05:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:05:42,873 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:43,077 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-06 22:05:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 22:05:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 22:05:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:43,078 INFO L225 Difference]: With dead ends: 100 [2021-12-06 22:05:43,078 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 22:05:43,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:05:43,078 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 22:05:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-12-06 22:05:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-06 22:05:43,086 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2021-12-06 22:05:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:43,086 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-06 22:05:43,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-06 22:05:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 22:05:43,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:43,087 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:43,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 22:05:43,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 22:05:43,288 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2021-12-06 22:05:43,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:43,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649102915] [2021-12-06 22:05:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:43,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:43,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649102915] [2021-12-06 22:05:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649102915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442669600] [2021-12-06 22:05:43,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:43,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:43,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:43,741 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:43,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 22:05:43,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-06 22:05:43,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 22:05:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:44,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442669600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:44,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2021-12-06 22:05:44,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683729935] [2021-12-06 22:05:44,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:44,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 22:05:44,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 22:05:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=3838, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 22:05:44,440 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:44,796 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-12-06 22:05:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 22:05:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 91 [2021-12-06 22:05:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:44,797 INFO L225 Difference]: With dead ends: 163 [2021-12-06 22:05:44,797 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 22:05:44,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1963, Invalid=6779, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 22:05:44,798 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:44,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 22:05:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-06 22:05:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-12-06 22:05:44,807 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2021-12-06 22:05:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-12-06 22:05:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-12-06 22:05:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 22:05:44,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:44,808 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:44,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 22:05:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 22:05:45,009 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2021-12-06 22:05:45,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:45,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403514960] [2021-12-06 22:05:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:45,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:45,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403514960] [2021-12-06 22:05:45,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403514960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580744215] [2021-12-06 22:05:45,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:45,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:45,218 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:45,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 22:05:45,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-06 22:05:45,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 22:05:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:45,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580744215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:45,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:45,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2021-12-06 22:05:45,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196475841] [2021-12-06 22:05:45,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:45,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 22:05:45,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 22:05:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:05:45,483 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:45,709 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-06 22:05:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 22:05:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 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 92 [2021-12-06 22:05:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:45,710 INFO L225 Difference]: With dead ends: 104 [2021-12-06 22:05:45,710 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 22:05:45,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:05:45,711 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:45,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 32 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 22:05:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-06 22:05:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-06 22:05:45,719 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2021-12-06 22:05:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:45,719 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-06 22:05:45,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-06 22:05:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 22:05:45,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:45,720 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:45,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 22:05:45,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 22:05:45,921 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2021-12-06 22:05:45,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:45,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906144348] [2021-12-06 22:05:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:45,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:46,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906144348] [2021-12-06 22:05:46,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906144348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100617981] [2021-12-06 22:05:46,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:46,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:46,330 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:46,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 22:05:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 22:05:46,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:46,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100617981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:47,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:47,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2021-12-06 22:05:47,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556438119] [2021-12-06 22:05:47,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:47,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 22:05:47,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:47,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 22:05:47,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=4173, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:05:47,059 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:47,445 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-12-06 22:05:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 22:05:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2021-12-06 22:05:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:47,445 INFO L225 Difference]: With dead ends: 170 [2021-12-06 22:05:47,446 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 22:05:47,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2132, Invalid=7374, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 22:05:47,446 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:47,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 305 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 22:05:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-06 22:05:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-06 22:05:47,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2021-12-06 22:05:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:47,455 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-06 22:05:47,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-06 22:05:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 22:05:47,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:47,455 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:47,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 22:05:47,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:47,656 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2021-12-06 22:05:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140194147] [2021-12-06 22:05:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:47,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:47,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140194147] [2021-12-06 22:05:47,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140194147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041499341] [2021-12-06 22:05:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:47,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:47,840 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:47,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 22:05:47,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:47,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:47,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 22:05:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:47,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041499341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:48,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:48,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2021-12-06 22:05:48,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484752792] [2021-12-06 22:05:48,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:05:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:05:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:05:48,084 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:48,302 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-12-06 22:05:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 22:05:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 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 96 [2021-12-06 22:05:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:48,303 INFO L225 Difference]: With dead ends: 108 [2021-12-06 22:05:48,303 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 22:05:48,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 22:05:48,304 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:48,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 22:05:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-12-06 22:05:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2021-12-06 22:05:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-06 22:05:48,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2021-12-06 22:05:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:48,313 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-06 22:05:48,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-06 22:05:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 22:05:48,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:48,314 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:48,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 22:05:48,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:48,515 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2021-12-06 22:05:48,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:48,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283701716] [2021-12-06 22:05:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:48,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:48,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283701716] [2021-12-06 22:05:48,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283701716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573310534] [2021-12-06 22:05:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:48,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:48,972 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:48,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 22:05:49,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-06 22:05:49,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:05:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:49,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573310534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:49,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:49,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2021-12-06 22:05:49,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830899313] [2021-12-06 22:05:49,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:49,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 22:05:49,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 22:05:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=4522, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:05:49,760 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:50,171 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-12-06 22:05:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 22:05:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 22:05:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:50,171 INFO L225 Difference]: With dead ends: 177 [2021-12-06 22:05:50,171 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 22:05:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2308, Invalid=7994, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 22:05:50,172 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 335 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 22:05:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-06 22:05:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-06 22:05:50,181 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2021-12-06 22:05:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:50,182 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-06 22:05:50,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-06 22:05:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 22:05:50,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:50,182 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:50,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 22:05:50,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 22:05:50,383 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2021-12-06 22:05:50,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:50,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212205573] [2021-12-06 22:05:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:50,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:50,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212205573] [2021-12-06 22:05:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212205573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254564159] [2021-12-06 22:05:50,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:50,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:50,569 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:50,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 22:05:50,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:50,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:50,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:05:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:50,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254564159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:50,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:50,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2021-12-06 22:05:50,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269352792] [2021-12-06 22:05:50,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:50,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 22:05:50,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 22:05:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:05:50,882 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:51,149 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-12-06 22:05:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:05:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 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 100 [2021-12-06 22:05:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:51,150 INFO L225 Difference]: With dead ends: 112 [2021-12-06 22:05:51,150 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 22:05:51,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 22:05:51,151 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:51,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 25 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 22:05:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-06 22:05:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-12-06 22:05:51,160 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2021-12-06 22:05:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:51,160 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-12-06 22:05:51,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-12-06 22:05:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 22:05:51,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:51,161 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:51,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 22:05:51,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 22:05:51,362 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2021-12-06 22:05:51,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:51,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315695597] [2021-12-06 22:05:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:51,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:51,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315695597] [2021-12-06 22:05:51,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315695597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297462354] [2021-12-06 22:05:51,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:05:51,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:51,869 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:51,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 22:05:51,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-06 22:05:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:05:51,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:52,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297462354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:52,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:52,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2021-12-06 22:05:52,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273315229] [2021-12-06 22:05:52,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:52,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 22:05:52,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 22:05:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 22:05:52,697 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:53,126 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-12-06 22:05:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 22:05:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 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 103 [2021-12-06 22:05:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:53,127 INFO L225 Difference]: With dead ends: 184 [2021-12-06 22:05:53,127 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 22:05:53,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2491, Invalid=8639, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 22:05:53,128 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:53,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 314 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 22:05:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-06 22:05:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-12-06 22:05:53,138 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2021-12-06 22:05:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:53,138 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-12-06 22:05:53,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-12-06 22:05:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 22:05:53,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:53,138 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:53,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 22:05:53,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 22:05:53,340 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2021-12-06 22:05:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:53,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774764916] [2021-12-06 22:05:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:53,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774764916] [2021-12-06 22:05:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774764916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452326037] [2021-12-06 22:05:53,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:05:53,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:53,557 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:53,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 22:05:53,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 22:05:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 22:05:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:53,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:53,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452326037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:53,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:53,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2021-12-06 22:05:53,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762800480] [2021-12-06 22:05:53,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:53,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 22:05:53,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 22:05:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:05:53,848 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:54,132 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-06 22:05:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 22:05:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 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 104 [2021-12-06 22:05:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:54,133 INFO L225 Difference]: With dead ends: 116 [2021-12-06 22:05:54,133 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 22:05:54,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 22:05:54,134 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:54,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 35 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 22:05:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-12-06 22:05:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 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) [2021-12-06 22:05:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-12-06 22:05:54,144 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2021-12-06 22:05:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:54,144 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-12-06 22:05:54,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-12-06 22:05:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 22:05:54,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:54,145 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:54,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 22:05:54,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 22:05:54,346 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2021-12-06 22:05:54,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:54,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786476837] [2021-12-06 22:05:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:54,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:54,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:54,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786476837] [2021-12-06 22:05:54,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786476837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:54,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843758868] [2021-12-06 22:05:54,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:05:54,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:54,844 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:54,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 22:05:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 22:05:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:55,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:55,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843758868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:55,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:55,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2021-12-06 22:05:55,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814887850] [2021-12-06 22:05:55,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:55,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 22:05:55,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 22:05:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=5262, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:05:55,781 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:56,207 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-12-06 22:05:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:05:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 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 107 [2021-12-06 22:05:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:56,208 INFO L225 Difference]: With dead ends: 191 [2021-12-06 22:05:56,208 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 22:05:56,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2681, Invalid=9309, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 22:05:56,209 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:56,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 271 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 22:05:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-12-06 22:05:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-12-06 22:05:56,219 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2021-12-06 22:05:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-12-06 22:05:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-12-06 22:05:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 22:05:56,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:56,220 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:56,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 22:05:56,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:56,421 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2021-12-06 22:05:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207778851] [2021-12-06 22:05:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:56,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207778851] [2021-12-06 22:05:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207778851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460390383] [2021-12-06 22:05:56,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:05:56,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:56,662 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:56,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 22:05:56,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:05:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 22:05:56,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:56,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460390383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:56,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2021-12-06 22:05:56,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134020708] [2021-12-06 22:05:56,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:56,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:05:56,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:05:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:05:56,924 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:57,211 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-12-06 22:05:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 22:05:57,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 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 108 [2021-12-06 22:05:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:57,212 INFO L225 Difference]: With dead ends: 120 [2021-12-06 22:05:57,212 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 22:05:57,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:05:57,213 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:57,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 22:05:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-12-06 22:05:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-06 22:05:57,223 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2021-12-06 22:05:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:57,224 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-06 22:05:57,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-06 22:05:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 22:05:57,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:57,224 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:57,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:57,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-06 22:05:57,425 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:57,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2021-12-06 22:05:57,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:57,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565748489] [2021-12-06 22:05:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:57,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:58,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565748489] [2021-12-06 22:05:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565748489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472340784] [2021-12-06 22:05:58,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:05:58,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:58,022 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:58,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 22:05:58,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-06 22:05:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 22:05:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:58,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472340784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:05:58,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:05:58,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2021-12-06 22:05:58,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753395142] [2021-12-06 22:05:58,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:05:58,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 22:05:58,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 22:05:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=5653, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 22:05:58,979 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:59,470 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-12-06 22:05:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 22:05:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 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 111 [2021-12-06 22:05:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:59,471 INFO L225 Difference]: With dead ends: 198 [2021-12-06 22:05:59,471 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 22:05:59,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2878, Invalid=10004, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 22:05:59,472 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:59,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 381 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:05:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 22:05:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-06 22:05:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-12-06 22:05:59,482 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2021-12-06 22:05:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-12-06 22:05:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-12-06 22:05:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 22:05:59,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:59,483 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:59,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-06 22:05:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 22:05:59,684 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2021-12-06 22:05:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435328816] [2021-12-06 22:05:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:59,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:05:59,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435328816] [2021-12-06 22:05:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435328816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497753867] [2021-12-06 22:05:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:05:59,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:59,933 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:59,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 22:05:59,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:05:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:05:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 22:05:59,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:00,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497753867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:00,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:00,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2021-12-06 22:06:00,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894502169] [2021-12-06 22:06:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:00,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:06:00,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:06:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:06:00,222 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:00,490 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-12-06 22:06:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 22:06:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 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 112 [2021-12-06 22:06:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:00,491 INFO L225 Difference]: With dead ends: 124 [2021-12-06 22:06:00,491 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 22:06:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:06:00,492 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:00,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 22:06:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-12-06 22:06:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-12-06 22:06:00,507 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2021-12-06 22:06:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:00,507 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-12-06 22:06:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-12-06 22:06:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 22:06:00,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:00,507 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:00,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 22:06:00,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:00,709 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2021-12-06 22:06:00,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:00,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922519274] [2021-12-06 22:06:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:00,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:01,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922519274] [2021-12-06 22:06:01,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922519274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354489748] [2021-12-06 22:06:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:06:01,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:01,302 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:01,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 22:06:01,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-06 22:06:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:06:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:02,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:02,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354489748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:02,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:02,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2021-12-06 22:06:02,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804689684] [2021-12-06 22:06:02,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:02,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 22:06:02,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 22:06:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=6058, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 22:06:02,278 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:02,806 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-12-06 22:06:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 22:06:02,807 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 115 [2021-12-06 22:06:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:02,807 INFO L225 Difference]: With dead ends: 205 [2021-12-06 22:06:02,807 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 22:06:02,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3082, Invalid=10724, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 22:06:02,808 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:02,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 346 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 22:06:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-06 22:06:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-06 22:06:02,820 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2021-12-06 22:06:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:02,820 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-06 22:06:02,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-06 22:06:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 22:06:02,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:02,821 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:02,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 22:06:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:03,021 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2021-12-06 22:06:03,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:03,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355836729] [2021-12-06 22:06:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:03,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:03,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355836729] [2021-12-06 22:06:03,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355836729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490324500] [2021-12-06 22:06:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:06:03,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:03,280 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:03,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 22:06:03,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-12-06 22:06:03,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 22:06:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:03,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:03,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490324500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:03,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:03,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2021-12-06 22:06:03,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104966849] [2021-12-06 22:06:03,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:03,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 22:06:03,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 22:06:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:06:03,603 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:03,871 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-06 22:06:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 22:06:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-06 22:06:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:03,872 INFO L225 Difference]: With dead ends: 128 [2021-12-06 22:06:03,872 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 22:06:03,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:06:03,873 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:03,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 31 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 22:06:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2021-12-06 22:06:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-12-06 22:06:03,884 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2021-12-06 22:06:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:03,884 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-12-06 22:06:03,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-12-06 22:06:03,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 22:06:03,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:03,885 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:03,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:04,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 22:06:04,086 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2021-12-06 22:06:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310346771] [2021-12-06 22:06:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:04,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:04,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310346771] [2021-12-06 22:06:04,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310346771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799978471] [2021-12-06 22:06:04,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:06:04,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:04,707 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:04,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 22:06:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 22:06:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:05,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:05,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799978471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:05,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2021-12-06 22:06:05,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041943460] [2021-12-06 22:06:05,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 22:06:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 22:06:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=6477, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:06:05,800 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:06,373 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-12-06 22:06:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 22:06:06,373 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 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 119 [2021-12-06 22:06:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:06,373 INFO L225 Difference]: With dead ends: 212 [2021-12-06 22:06:06,373 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 22:06:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3293, Invalid=11469, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 22:06:06,374 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 397 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 22:06:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 22:06:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-12-06 22:06:06,386 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2021-12-06 22:06:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:06,386 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-12-06 22:06:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-12-06 22:06:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 22:06:06,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:06,387 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:06,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 22:06:06,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 22:06:06,588 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2021-12-06 22:06:06,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380302115] [2021-12-06 22:06:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:06,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:06,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:06,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380302115] [2021-12-06 22:06:06,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380302115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700658601] [2021-12-06 22:06:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:06:06,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:06,857 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 22:06:06,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:06:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 22:06:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:07,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700658601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:07,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:07,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2021-12-06 22:06:07,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182639296] [2021-12-06 22:06:07,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:06:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:06:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:06:07,142 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:07,438 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2021-12-06 22:06:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 22:06:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-06 22:06:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:07,438 INFO L225 Difference]: With dead ends: 132 [2021-12-06 22:06:07,439 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 22:06:07,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:06:07,439 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:07,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:07,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 22:06:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-12-06 22:06:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 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) [2021-12-06 22:06:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-12-06 22:06:07,451 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2021-12-06 22:06:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:07,452 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-12-06 22:06:07,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-12-06 22:06:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 22:06:07,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:07,452 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:07,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:07,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 22:06:07,653 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2021-12-06 22:06:07,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414007646] [2021-12-06 22:06:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:07,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:08,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414007646] [2021-12-06 22:06:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414007646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398742834] [2021-12-06 22:06:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:06:08,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:08,303 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:08,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 22:06:08,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-12-06 22:06:08,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 22:06:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:09,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398742834] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:09,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:09,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2021-12-06 22:06:09,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155774458] [2021-12-06 22:06:09,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:09,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 22:06:09,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 22:06:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=6910, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 22:06:09,497 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:10,106 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-12-06 22:06:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 22:06:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 123 [2021-12-06 22:06:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:10,107 INFO L225 Difference]: With dead ends: 219 [2021-12-06 22:06:10,107 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 22:06:10,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3511, Invalid=12239, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 22:06:10,108 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:10,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 22:06:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-06 22:06:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-06 22:06:10,120 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2021-12-06 22:06:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-06 22:06:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-06 22:06:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 22:06:10,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:10,121 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:10,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 22:06:10,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 22:06:10,322 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2021-12-06 22:06:10,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446819453] [2021-12-06 22:06:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:10,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446819453] [2021-12-06 22:06:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446819453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114292299] [2021-12-06 22:06:10,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:06:10,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:10,599 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:10,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 22:06:10,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:06:10,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 22:06:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:10,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:10,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114292299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:10,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:10,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2021-12-06 22:06:10,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995005681] [2021-12-06 22:06:10,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:10,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:06:10,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:06:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:06:10,911 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:11,220 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-12-06 22:06:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 22:06:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-06 22:06:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:11,221 INFO L225 Difference]: With dead ends: 136 [2021-12-06 22:06:11,221 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 22:06:11,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:06:11,222 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:11,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 28 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 22:06:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-12-06 22:06:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-12-06 22:06:11,235 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2021-12-06 22:06:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:11,235 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-12-06 22:06:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-12-06 22:06:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 22:06:11,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:11,236 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:11,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 22:06:11,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 22:06:11,437 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2021-12-06 22:06:11,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381130421] [2021-12-06 22:06:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:11,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:12,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:12,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381130421] [2021-12-06 22:06:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381130421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:12,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066635892] [2021-12-06 22:06:12,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:06:12,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:12,123 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:12,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 22:06:12,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-06 22:06:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 22:06:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:13,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:13,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066635892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:13,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:13,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2021-12-06 22:06:13,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664700685] [2021-12-06 22:06:13,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 22:06:13,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 22:06:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7357, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 22:06:13,319 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:13,916 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-12-06 22:06:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 22:06:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-06 22:06:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:13,916 INFO L225 Difference]: With dead ends: 226 [2021-12-06 22:06:13,917 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 22:06:13,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3708 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3736, Invalid=13034, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 22:06:13,917 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:13,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 22:06:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-06 22:06:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-06 22:06:13,931 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2021-12-06 22:06:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:13,931 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-06 22:06:13,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-06 22:06:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 22:06:13,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:13,931 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:13,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 22:06:14,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:14,133 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2021-12-06 22:06:14,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:14,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557405723] [2021-12-06 22:06:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:14,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:14,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557405723] [2021-12-06 22:06:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557405723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016172454] [2021-12-06 22:06:14,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:06:14,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:14,463 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:14,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 22:06:14,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-12-06 22:06:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:06:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:14,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:14,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016172454] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:14,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2021-12-06 22:06:14,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12156885] [2021-12-06 22:06:14,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:14,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:06:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:06:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:06:14,799 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:15,109 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-06 22:06:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 22:06:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-06 22:06:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:15,109 INFO L225 Difference]: With dead ends: 140 [2021-12-06 22:06:15,110 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 22:06:15,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 22:06:15,110 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:15,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 22:06:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-12-06 22:06:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-12-06 22:06:15,124 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2021-12-06 22:06:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:15,124 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-12-06 22:06:15,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-12-06 22:06:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 22:06:15,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:15,125 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:15,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 22:06:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-06 22:06:15,326 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2021-12-06 22:06:15,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:15,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531824994] [2021-12-06 22:06:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:15,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:16,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531824994] [2021-12-06 22:06:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531824994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180730073] [2021-12-06 22:06:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:06:16,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:16,080 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:16,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 22:06:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:16,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 22:06:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:17,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:17,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180730073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:17,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:17,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2021-12-06 22:06:17,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038316365] [2021-12-06 22:06:17,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:17,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 22:06:17,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 22:06:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=7818, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 22:06:17,254 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:17,893 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-12-06 22:06:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 22:06:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-06 22:06:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:17,894 INFO L225 Difference]: With dead ends: 233 [2021-12-06 22:06:17,894 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 22:06:17,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3940 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3968, Invalid=13854, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 22:06:17,895 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:17,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 387 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 22:06:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-06 22:06:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-12-06 22:06:17,910 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2021-12-06 22:06:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-12-06 22:06:17,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-12-06 22:06:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 22:06:17,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:17,911 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:17,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 22:06:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:18,112 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2021-12-06 22:06:18,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:18,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675805873] [2021-12-06 22:06:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:18,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:18,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675805873] [2021-12-06 22:06:18,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675805873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472793927] [2021-12-06 22:06:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:06:18,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:18,456 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 22:06:18,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:06:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 22:06:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:18,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472793927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:18,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:18,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2021-12-06 22:06:18,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054005668] [2021-12-06 22:06:18,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:06:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:06:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:06:18,798 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:19,110 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2021-12-06 22:06:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 22:06:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-06 22:06:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:19,111 INFO L225 Difference]: With dead ends: 144 [2021-12-06 22:06:19,111 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 22:06:19,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 22:06:19,112 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:19,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 35 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 22:06:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-12-06 22:06:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-12-06 22:06:19,130 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2021-12-06 22:06:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:19,130 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-12-06 22:06:19,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-12-06 22:06:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 22:06:19,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:19,131 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:19,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:19,332 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2021-12-06 22:06:19,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:19,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006973547] [2021-12-06 22:06:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:19,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:20,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006973547] [2021-12-06 22:06:20,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006973547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493107804] [2021-12-06 22:06:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:06:20,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:20,095 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:20,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 22:06:20,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-12-06 22:06:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 22:06:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:21,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493107804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:21,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2021-12-06 22:06:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592066888] [2021-12-06 22:06:21,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:21,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 22:06:21,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 22:06:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=8293, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 22:06:21,412 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:22,055 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-12-06 22:06:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 22:06:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-06 22:06:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:22,056 INFO L225 Difference]: With dead ends: 240 [2021-12-06 22:06:22,056 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 22:06:22,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4179 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4207, Invalid=14699, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 22:06:22,057 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:22,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 375 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 22:06:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-06 22:06:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-12-06 22:06:22,072 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2021-12-06 22:06:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:22,072 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-12-06 22:06:22,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-12-06 22:06:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 22:06:22,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:22,073 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:22,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 22:06:22,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:22,274 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:22,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2021-12-06 22:06:22,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128993462] [2021-12-06 22:06:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:22,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:22,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128993462] [2021-12-06 22:06:22,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128993462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337560248] [2021-12-06 22:06:22,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:06:22,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:22,621 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:22,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 22:06:22,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:06:22,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 22:06:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:22,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:22,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337560248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:22,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:22,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2021-12-06 22:06:22,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523412249] [2021-12-06 22:06:22,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:22,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 22:06:22,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 22:06:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 22:06:22,956 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:23,333 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-12-06 22:06:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 22:06:23,333 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-06 22:06:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:23,334 INFO L225 Difference]: With dead ends: 148 [2021-12-06 22:06:23,334 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 22:06:23,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:06:23,335 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:23,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 22:06:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-12-06 22:06:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 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) [2021-12-06 22:06:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-12-06 22:06:23,350 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2021-12-06 22:06:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:23,350 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-12-06 22:06:23,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-12-06 22:06:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 22:06:23,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:23,351 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:23,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 22:06:23,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 22:06:23,552 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2021-12-06 22:06:23,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:23,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222961786] [2021-12-06 22:06:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:23,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:24,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:24,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222961786] [2021-12-06 22:06:24,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222961786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:24,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450861956] [2021-12-06 22:06:24,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:06:24,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:24,372 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:24,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 22:06:24,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-12-06 22:06:24,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:06:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:25,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450861956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:25,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:25,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2021-12-06 22:06:25,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615187689] [2021-12-06 22:06:25,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:25,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 22:06:25,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 22:06:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=8782, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 22:06:25,772 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:26,468 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-12-06 22:06:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 22:06:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-06 22:06:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:26,469 INFO L225 Difference]: With dead ends: 247 [2021-12-06 22:06:26,469 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 22:06:26,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4453, Invalid=15569, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 22:06:26,470 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:26,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 360 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 22:06:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-06 22:06:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 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) [2021-12-06 22:06:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-12-06 22:06:26,485 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2021-12-06 22:06:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:26,485 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-12-06 22:06:26,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-12-06 22:06:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 22:06:26,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:26,486 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:26,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 22:06:26,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 22:06:26,687 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2021-12-06 22:06:26,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:26,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702147917] [2021-12-06 22:06:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:26,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:27,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702147917] [2021-12-06 22:06:27,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702147917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853305396] [2021-12-06 22:06:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:06:27,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:27,041 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:27,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 22:06:27,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-12-06 22:06:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 22:06:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853305396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:27,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:27,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2021-12-06 22:06:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171118226] [2021-12-06 22:06:27,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:27,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:06:27,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:06:27,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:06:27,451 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:27,852 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-12-06 22:06:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 22:06:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 22:06:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:27,853 INFO L225 Difference]: With dead ends: 152 [2021-12-06 22:06:27,853 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 22:06:27,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 22:06:27,854 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:27,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 34 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 22:06:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-12-06 22:06:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-12-06 22:06:27,870 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2021-12-06 22:06:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:27,870 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-12-06 22:06:27,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-12-06 22:06:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 22:06:27,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:27,871 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:27,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:28,072 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2021-12-06 22:06:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53023629] [2021-12-06 22:06:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:28,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53023629] [2021-12-06 22:06:28,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53023629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692409997] [2021-12-06 22:06:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:06:28,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:28,933 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:28,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 22:06:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 22:06:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:30,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:30,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692409997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:30,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:30,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2021-12-06 22:06:30,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280126783] [2021-12-06 22:06:30,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:30,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 22:06:30,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 22:06:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=9285, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 22:06:30,429 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:31,108 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-12-06 22:06:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 22:06:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2021-12-06 22:06:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:31,109 INFO L225 Difference]: With dead ends: 254 [2021-12-06 22:06:31,109 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 22:06:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4678 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4706, Invalid=16464, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 22:06:31,110 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:31,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 301 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 22:06:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-06 22:06:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-12-06 22:06:31,138 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2021-12-06 22:06:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:31,138 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-12-06 22:06:31,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-12-06 22:06:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 22:06:31,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:31,139 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:31,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 22:06:31,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 22:06:31,340 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2021-12-06 22:06:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:31,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832363286] [2021-12-06 22:06:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:31,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:31,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:31,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832363286] [2021-12-06 22:06:31,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832363286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:31,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219150968] [2021-12-06 22:06:31,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:06:31,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:31,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:31,733 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:31,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 22:06:31,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:06:31,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 22:06:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:32,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219150968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:32,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:32,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2021-12-06 22:06:32,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356739259] [2021-12-06 22:06:32,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 22:06:32,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 22:06:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:06:32,068 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:32,418 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2021-12-06 22:06:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 22:06:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-06 22:06:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:32,419 INFO L225 Difference]: With dead ends: 156 [2021-12-06 22:06:32,419 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 22:06:32,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:06:32,420 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:32,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 41 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 22:06:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-12-06 22:06:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-12-06 22:06:32,437 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2021-12-06 22:06:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:32,437 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-12-06 22:06:32,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-12-06 22:06:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:06:32,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:32,438 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:32,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:32,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:32,639 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2021-12-06 22:06:32,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244665419] [2021-12-06 22:06:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:32,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:33,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244665419] [2021-12-06 22:06:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244665419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656970451] [2021-12-06 22:06:33,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:06:33,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:33,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:33,542 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:33,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 22:06:33,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-12-06 22:06:33,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:06:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:34,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:35,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656970451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:35,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:35,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2021-12-06 22:06:35,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818113506] [2021-12-06 22:06:35,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:35,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-06 22:06:35,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-06 22:06:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=9802, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 22:06:35,117 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:35,848 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-12-06 22:06:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 22:06:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 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 147 [2021-12-06 22:06:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:35,849 INFO L225 Difference]: With dead ends: 261 [2021-12-06 22:06:35,849 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 22:06:35,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4966, Invalid=17384, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 22:06:35,850 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:35,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 368 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 22:06:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-06 22:06:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-12-06 22:06:35,871 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2021-12-06 22:06:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:35,871 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-12-06 22:06:35,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-12-06 22:06:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 22:06:35,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:35,872 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:35,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 22:06:36,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:36,073 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2021-12-06 22:06:36,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943800082] [2021-12-06 22:06:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:36,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:36,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943800082] [2021-12-06 22:06:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943800082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849159169] [2021-12-06 22:06:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:06:36,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:36,429 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 22:06:36,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:06:36,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 22:06:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:36,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:36,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849159169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:36,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:36,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2021-12-06 22:06:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681904124] [2021-12-06 22:06:36,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:06:36,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:06:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:06:36,769 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:37,137 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2021-12-06 22:06:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 22:06:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-06 22:06:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:37,138 INFO L225 Difference]: With dead ends: 160 [2021-12-06 22:06:37,138 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 22:06:37,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 22:06:37,139 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:37,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 32 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 22:06:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2021-12-06 22:06:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-12-06 22:06:37,156 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2021-12-06 22:06:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:37,157 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-12-06 22:06:37,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-12-06 22:06:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 22:06:37,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:37,157 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:37,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 22:06:37,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:37,358 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2021-12-06 22:06:37,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:37,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245838301] [2021-12-06 22:06:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:37,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:38,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245838301] [2021-12-06 22:06:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245838301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264923910] [2021-12-06 22:06:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:06:38,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:38,377 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:38,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 22:06:38,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-12-06 22:06:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:38,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 22:06:38,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:39,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264923910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:39,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:39,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2021-12-06 22:06:39,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296555869] [2021-12-06 22:06:39,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:39,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-06 22:06:39,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-06 22:06:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=10333, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 22:06:39,943 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:40,846 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-12-06 22:06:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 22:06:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-06 22:06:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:40,847 INFO L225 Difference]: With dead ends: 268 [2021-12-06 22:06:40,847 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 22:06:40,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5205 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5233, Invalid=18329, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 22:06:40,848 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:40,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 22:06:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-06 22:06:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-12-06 22:06:40,866 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2021-12-06 22:06:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:40,866 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-12-06 22:06:40,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-12-06 22:06:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 22:06:40,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:40,867 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:40,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 22:06:41,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:41,068 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2021-12-06 22:06:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:41,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548789586] [2021-12-06 22:06:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:41,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:41,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:41,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548789586] [2021-12-06 22:06:41,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548789586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199039923] [2021-12-06 22:06:41,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:06:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:41,464 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:41,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 22:06:41,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-12-06 22:06:41,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:41,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 22:06:41,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:41,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:41,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199039923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:41,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2021-12-06 22:06:41,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098798278] [2021-12-06 22:06:41,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:41,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 22:06:41,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 22:06:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:06:41,871 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:42,266 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2021-12-06 22:06:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 22:06:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-06 22:06:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:42,267 INFO L225 Difference]: With dead ends: 164 [2021-12-06 22:06:42,267 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 22:06:42,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 22:06:42,267 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:42,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 23 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 22:06:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2021-12-06 22:06:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2021-12-06 22:06:42,286 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2021-12-06 22:06:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:42,286 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2021-12-06 22:06:42,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2021-12-06 22:06:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 22:06:42,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:42,287 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:42,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 22:06:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:42,488 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2021-12-06 22:06:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95341124] [2021-12-06 22:06:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:42,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:43,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95341124] [2021-12-06 22:06:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95341124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767195869] [2021-12-06 22:06:43,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:06:43,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:43,520 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:43,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 22:06:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 22:06:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:44,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:45,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767195869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:45,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:45,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2021-12-06 22:06:45,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99515859] [2021-12-06 22:06:45,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:45,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 22:06:45,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 22:06:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=10878, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 22:06:45,146 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:46,080 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2021-12-06 22:06:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 22:06:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 155 [2021-12-06 22:06:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:46,081 INFO L225 Difference]: With dead ends: 275 [2021-12-06 22:06:46,081 INFO L226 Difference]: Without dead ends: 157 [2021-12-06 22:06:46,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5479 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5507, Invalid=19299, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:06:46,083 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:46,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 615 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:06:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-06 22:06:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-06 22:06:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-12-06 22:06:46,102 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2021-12-06 22:06:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:46,102 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-12-06 22:06:46,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-12-06 22:06:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 22:06:46,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:46,103 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:46,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:46,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-06 22:06:46,304 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2021-12-06 22:06:46,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:46,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680755294] [2021-12-06 22:06:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:46,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:46,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680755294] [2021-12-06 22:06:46,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680755294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286864480] [2021-12-06 22:06:46,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:06:46,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:46,735 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:46,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 22:06:46,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:06:46,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 22:06:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:46,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:47,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286864480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:47,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:47,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2021-12-06 22:06:47,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488766873] [2021-12-06 22:06:47,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:47,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:06:47,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:06:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:06:47,108 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:47,617 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2021-12-06 22:06:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 22:06:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-06 22:06:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:47,618 INFO L225 Difference]: With dead ends: 168 [2021-12-06 22:06:47,618 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 22:06:47,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 22:06:47,619 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:47,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 22:06:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-06 22:06:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-12-06 22:06:47,639 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2021-12-06 22:06:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:47,640 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-12-06 22:06:47,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-12-06 22:06:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 22:06:47,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:47,640 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:47,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-06 22:06:47,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:47,842 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2021-12-06 22:06:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565122361] [2021-12-06 22:06:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:47,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:48,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:48,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565122361] [2021-12-06 22:06:48,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565122361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:48,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908206248] [2021-12-06 22:06:48,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:06:48,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:48,965 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:48,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 22:06:49,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-12-06 22:06:49,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 22:06:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908206248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:50,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2021-12-06 22:06:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047808929] [2021-12-06 22:06:50,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:50,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 22:06:50,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 22:06:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11437, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 22:06:50,711 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:51,603 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-12-06 22:06:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 22:06:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-06 22:06:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:51,603 INFO L225 Difference]: With dead ends: 282 [2021-12-06 22:06:51,604 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 22:06:51,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5760 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5788, Invalid=20294, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 22:06:51,605 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:51,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 526 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 22:06:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-12-06 22:06:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-12-06 22:06:51,637 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2021-12-06 22:06:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:51,637 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-12-06 22:06:51,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-12-06 22:06:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 22:06:51,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:51,638 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:51,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 22:06:51,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:51,838 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2021-12-06 22:06:51,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:51,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731864720] [2021-12-06 22:06:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:51,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:52,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731864720] [2021-12-06 22:06:52,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731864720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622478076] [2021-12-06 22:06:52,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:06:52,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:52,274 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:52,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 22:06:52,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:06:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 22:06:52,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:52,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:52,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622478076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:52,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:52,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2021-12-06 22:06:52,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439944121] [2021-12-06 22:06:52,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 22:06:52,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 22:06:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 22:06:52,648 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:53,124 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-12-06 22:06:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 22:06:53,124 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 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 160 [2021-12-06 22:06:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:53,125 INFO L225 Difference]: With dead ends: 172 [2021-12-06 22:06:53,125 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 22:06:53,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 22:06:53,126 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:53,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 34 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 22:06:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2021-12-06 22:06:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-12-06 22:06:53,146 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2021-12-06 22:06:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:53,147 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-12-06 22:06:53,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-12-06 22:06:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 22:06:53,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:53,147 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:53,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-06 22:06:53,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 22:06:53,349 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2021-12-06 22:06:53,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:53,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317713706] [2021-12-06 22:06:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:53,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:54,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317713706] [2021-12-06 22:06:54,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317713706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835154888] [2021-12-06 22:06:54,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:06:54,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:54,430 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:54,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 22:06:54,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-12-06 22:06:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 22:06:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:56,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:56,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835154888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:56,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:56,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2021-12-06 22:06:56,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331087545] [2021-12-06 22:06:56,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-06 22:06:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-06 22:06:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=12010, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 22:06:56,193 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:57,086 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2021-12-06 22:06:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 22:06:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 163 [2021-12-06 22:06:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:57,087 INFO L225 Difference]: With dead ends: 289 [2021-12-06 22:06:57,087 INFO L226 Difference]: Without dead ends: 165 [2021-12-06 22:06:57,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6076, Invalid=21314, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 22:06:57,088 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:57,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 450 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:06:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-06 22:06:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-06 22:06:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-12-06 22:06:57,109 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2021-12-06 22:06:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-12-06 22:06:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-12-06 22:06:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:06:57,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:57,109 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:57,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 22:06:57,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 22:06:57,311 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2021-12-06 22:06:57,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:57,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489743102] [2021-12-06 22:06:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:57,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:57,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489743102] [2021-12-06 22:06:57,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489743102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531155391] [2021-12-06 22:06:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:06:57,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:57,796 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:57,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 22:06:57,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-12-06 22:06:57,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 22:06:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:58,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:58,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531155391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:58,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:58,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2021-12-06 22:06:58,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755509843] [2021-12-06 22:06:58,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:58,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:06:58,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:06:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:06:58,237 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:06:58,672 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2021-12-06 22:06:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 22:06:58,672 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-06 22:06:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:06:58,673 INFO L225 Difference]: With dead ends: 176 [2021-12-06 22:06:58,673 INFO L226 Difference]: Without dead ends: 174 [2021-12-06 22:06:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 22:06:58,673 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:06:58,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 41 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:06:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-06 22:06:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2021-12-06 22:06:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-12-06 22:06:58,695 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2021-12-06 22:06:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:06:58,695 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-12-06 22:06:58,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-12-06 22:06:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 22:06:58,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:06:58,695 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:58,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 22:06:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:58,897 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:06:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2021-12-06 22:06:58,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:58,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006444009] [2021-12-06 22:06:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:58,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2302 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:00,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006444009] [2021-12-06 22:07:00,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006444009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059055843] [2021-12-06 22:07:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:07:00,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:00,032 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:00,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 22:07:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 22:07:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:01,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059055843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:01,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:01,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 128 [2021-12-06 22:07:01,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792788026] [2021-12-06 22:07:01,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:01,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 22:07:01,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 22:07:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=12597, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 22:07:01,826 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:02,764 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-12-06 22:07:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 22:07:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 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 167 [2021-12-06 22:07:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:02,765 INFO L225 Difference]: With dead ends: 296 [2021-12-06 22:07:02,765 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 22:07:02,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6343 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6371, Invalid=22359, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 22:07:02,766 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:02,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 436 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 22:07:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-06 22:07:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-12-06 22:07:02,788 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2021-12-06 22:07:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:02,788 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-12-06 22:07:02,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-12-06 22:07:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 22:07:02,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:02,789 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:02,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-06 22:07:02,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:02,990 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2021-12-06 22:07:02,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:02,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725794343] [2021-12-06 22:07:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:02,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:03,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:03,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725794343] [2021-12-06 22:07:03,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725794343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844415197] [2021-12-06 22:07:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:07:03,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:03,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:03,467 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 22:07:03,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:07:03,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:03,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 22:07:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844415197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:03,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:03,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2021-12-06 22:07:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853079232] [2021-12-06 22:07:03,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:03,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 22:07:03,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 22:07:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:07:03,845 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:04,297 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-12-06 22:07:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 22:07:04,298 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 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 168 [2021-12-06 22:07:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:04,299 INFO L225 Difference]: With dead ends: 180 [2021-12-06 22:07:04,299 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 22:07:04,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 22:07:04,299 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:04,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:07:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 22:07:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2021-12-06 22:07:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-12-06 22:07:04,322 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2021-12-06 22:07:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:04,322 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-12-06 22:07:04,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-12-06 22:07:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-06 22:07:04,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:04,323 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:04,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 22:07:04,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:04,523 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2021-12-06 22:07:04,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:04,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191472463] [2021-12-06 22:07:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:04,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2421 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:05,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191472463] [2021-12-06 22:07:05,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191472463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688368082] [2021-12-06 22:07:05,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:07:05,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:05,688 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:05,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 22:07:05,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-12-06 22:07:05,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 22:07:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:07,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688368082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:07,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 131 [2021-12-06 22:07:07,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888414801] [2021-12-06 22:07:07,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-06 22:07:07,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-06 22:07:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=13198, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 22:07:07,831 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:08,835 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2021-12-06 22:07:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 22:07:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 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 171 [2021-12-06 22:07:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:08,836 INFO L225 Difference]: With dead ends: 303 [2021-12-06 22:07:08,836 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 22:07:08,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6673, Invalid=23429, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 22:07:08,837 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:08,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 520 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 22:07:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-06 22:07:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-12-06 22:07:08,860 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2021-12-06 22:07:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:08,860 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-12-06 22:07:08,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-12-06 22:07:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 22:07:08,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:08,861 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:08,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-06 22:07:09,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:09,062 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2021-12-06 22:07:09,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:09,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092336769] [2021-12-06 22:07:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:09,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:09,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092336769] [2021-12-06 22:07:09,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092336769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920565615] [2021-12-06 22:07:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:07:09,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:09,588 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 22:07:09,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:07:09,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:07:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:09,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920565615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:09,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:09,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2021-12-06 22:07:09,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110201867] [2021-12-06 22:07:09,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:09,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:07:09,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:07:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:07:09,988 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:10,472 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2021-12-06 22:07:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 22:07:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-06 22:07:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:10,473 INFO L225 Difference]: With dead ends: 184 [2021-12-06 22:07:10,473 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 22:07:10,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:07:10,474 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:10,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 37 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:07:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 22:07:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-12-06 22:07:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-12-06 22:07:10,497 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2021-12-06 22:07:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-12-06 22:07:10,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-12-06 22:07:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 22:07:10,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:10,498 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:10,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-06 22:07:10,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-06 22:07:10,699 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2021-12-06 22:07:10,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:10,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224087885] [2021-12-06 22:07:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:10,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2543 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:11,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224087885] [2021-12-06 22:07:11,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224087885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016504849] [2021-12-06 22:07:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:07:11,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:11,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:11,946 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:11,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 22:07:12,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-12-06 22:07:12,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 22:07:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:13,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:14,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016504849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:14,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:14,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 134 [2021-12-06 22:07:14,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009412316] [2021-12-06 22:07:14,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:14,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-06 22:07:14,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-06 22:07:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=13813, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 22:07:14,017 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:15,095 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2021-12-06 22:07:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 22:07:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 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 175 [2021-12-06 22:07:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:15,096 INFO L225 Difference]: With dead ends: 310 [2021-12-06 22:07:15,096 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 22:07:15,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6954 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6982, Invalid=24524, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 22:07:15,097 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:15,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 651 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:07:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 22:07:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-06 22:07:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-12-06 22:07:15,121 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2021-12-06 22:07:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-12-06 22:07:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-12-06 22:07:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 22:07:15,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:15,122 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:15,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-06 22:07:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:15,323 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2021-12-06 22:07:15,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:15,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533101744] [2021-12-06 22:07:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:15,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533101744] [2021-12-06 22:07:15,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533101744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543617967] [2021-12-06 22:07:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:07:15,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:15,859 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 22:07:15,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-12-06 22:07:15,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 22:07:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543617967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:16,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:16,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2021-12-06 22:07:16,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947167176] [2021-12-06 22:07:16,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:16,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:07:16,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:07:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 22:07:16,354 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:16,870 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2021-12-06 22:07:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 22:07:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-12-06 22:07:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:16,871 INFO L225 Difference]: With dead ends: 188 [2021-12-06 22:07:16,872 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 22:07:16,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 22:07:16,872 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:16,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 22:07:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2021-12-06 22:07:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2021-12-06 22:07:16,896 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2021-12-06 22:07:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:16,897 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2021-12-06 22:07:16,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2021-12-06 22:07:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-06 22:07:16,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:16,897 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:16,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-06 22:07:17,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:17,098 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:17,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2021-12-06 22:07:17,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:17,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925440019] [2021-12-06 22:07:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:17,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2668 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:18,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925440019] [2021-12-06 22:07:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925440019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067981331] [2021-12-06 22:07:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:07:18,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:18,429 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 22:07:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 22:07:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067981331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:20,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 137 [2021-12-06 22:07:20,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37207122] [2021-12-06 22:07:20,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-06 22:07:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-06 22:07:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=14442, Unknown=0, NotChecked=0, Total=18632 [2021-12-06 22:07:20,564 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:21,657 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2021-12-06 22:07:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 22:07:21,658 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 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 179 [2021-12-06 22:07:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:21,658 INFO L225 Difference]: With dead ends: 317 [2021-12-06 22:07:21,658 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 22:07:21,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7270 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7298, Invalid=25644, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 22:07:21,660 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:21,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 567 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 22:07:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-12-06 22:07:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-12-06 22:07:21,685 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2021-12-06 22:07:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:21,685 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-12-06 22:07:21,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-12-06 22:07:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 22:07:21,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:21,686 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:21,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-06 22:07:21,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 22:07:21,887 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2021-12-06 22:07:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305129026] [2021-12-06 22:07:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:21,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:22,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305129026] [2021-12-06 22:07:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305129026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992574368] [2021-12-06 22:07:22,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:07:22,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:22,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:22,407 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:22,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-06 22:07:22,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:07:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 22:07:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:22,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:22,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992574368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:22,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:22,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2021-12-06 22:07:22,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431050763] [2021-12-06 22:07:22,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:22,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:07:22,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:07:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:07:22,816 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:23,377 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2021-12-06 22:07:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:07:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-12-06 22:07:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:23,378 INFO L225 Difference]: With dead ends: 192 [2021-12-06 22:07:23,378 INFO L226 Difference]: Without dead ends: 190 [2021-12-06 22:07:23,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 22:07:23,379 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:23,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 37 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-06 22:07:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2021-12-06 22:07:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2021-12-06 22:07:23,404 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2021-12-06 22:07:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2021-12-06 22:07:23,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2021-12-06 22:07:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 22:07:23,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:23,405 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:23,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-12-06 22:07:23,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 22:07:23,606 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2021-12-06 22:07:23,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:23,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467241836] [2021-12-06 22:07:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:23,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2796 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:25,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467241836] [2021-12-06 22:07:25,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467241836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327887664] [2021-12-06 22:07:25,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:07:25,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:25,048 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:25,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-06 22:07:25,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-12-06 22:07:25,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 22:07:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:27,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:27,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327887664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:27,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:27,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 140 [2021-12-06 22:07:27,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916730222] [2021-12-06 22:07:27,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-12-06 22:07:27,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-12-06 22:07:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=15085, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 22:07:27,219 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:28,337 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2021-12-06 22:07:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 22:07:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 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 183 [2021-12-06 22:07:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:28,338 INFO L225 Difference]: With dead ends: 324 [2021-12-06 22:07:28,338 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 22:07:28,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7593 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7621, Invalid=26789, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 22:07:28,339 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:28,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 22:07:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 22:07:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-12-06 22:07:28,365 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2021-12-06 22:07:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:28,365 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-12-06 22:07:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-12-06 22:07:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 22:07:28,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:28,366 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:28,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-06 22:07:28,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:28,567 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2021-12-06 22:07:28,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:28,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208137160] [2021-12-06 22:07:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:28,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:29,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208137160] [2021-12-06 22:07:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208137160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361783648] [2021-12-06 22:07:29,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:07:29,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:29,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:29,149 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:29,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-06 22:07:29,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:07:29,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 22:07:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:29,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:29,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361783648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:29,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:29,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2021-12-06 22:07:29,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801165865] [2021-12-06 22:07:29,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:29,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 22:07:29,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 22:07:29,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:07:29,598 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:30,156 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-12-06 22:07:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 22:07:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-12-06 22:07:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:30,157 INFO L225 Difference]: With dead ends: 196 [2021-12-06 22:07:30,157 INFO L226 Difference]: Without dead ends: 194 [2021-12-06 22:07:30,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 22:07:30,158 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:30,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-06 22:07:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2021-12-06 22:07:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-12-06 22:07:30,183 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2021-12-06 22:07:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:30,184 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-12-06 22:07:30,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-12-06 22:07:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 22:07:30,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:30,184 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:30,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-12-06 22:07:30,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-06 22:07:30,386 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2021-12-06 22:07:30,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:30,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211028651] [2021-12-06 22:07:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:30,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 2927 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:31,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211028651] [2021-12-06 22:07:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211028651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603011649] [2021-12-06 22:07:31,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:07:31,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:31,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:31,802 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:31,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-06 22:07:31,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-12-06 22:07:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 22:07:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603011649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:34,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:34,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 143 [2021-12-06 22:07:34,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507809281] [2021-12-06 22:07:34,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:34,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-06 22:07:34,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-06 22:07:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=15742, Unknown=0, NotChecked=0, Total=20306 [2021-12-06 22:07:34,087 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:35,249 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2021-12-06 22:07:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:07:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 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 187 [2021-12-06 22:07:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:35,250 INFO L225 Difference]: With dead ends: 331 [2021-12-06 22:07:35,250 INFO L226 Difference]: Without dead ends: 189 [2021-12-06 22:07:35,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7923 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7951, Invalid=27959, Unknown=0, NotChecked=0, Total=35910 [2021-12-06 22:07:35,252 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:35,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-06 22:07:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-12-06 22:07:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-12-06 22:07:35,278 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2021-12-06 22:07:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:35,278 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-12-06 22:07:35,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-12-06 22:07:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 22:07:35,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:35,279 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:35,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-12-06 22:07:35,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:35,480 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2021-12-06 22:07:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282118775] [2021-12-06 22:07:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:35,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:36,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:36,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282118775] [2021-12-06 22:07:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282118775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:36,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924102930] [2021-12-06 22:07:36,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:07:36,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:36,055 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:36,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-06 22:07:36,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-12-06 22:07:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 22:07:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:36,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:36,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924102930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:36,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:36,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2021-12-06 22:07:36,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160946197] [2021-12-06 22:07:36,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:36,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:07:36,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:07:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:07:36,565 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:37,113 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-12-06 22:07:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 22:07:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 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 188 [2021-12-06 22:07:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:37,114 INFO L225 Difference]: With dead ends: 200 [2021-12-06 22:07:37,114 INFO L226 Difference]: Without dead ends: 198 [2021-12-06 22:07:37,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 22:07:37,115 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 151 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:37,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 35 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-06 22:07:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2021-12-06 22:07:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-12-06 22:07:37,142 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2021-12-06 22:07:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:37,142 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-12-06 22:07:37,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-12-06 22:07:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 22:07:37,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:37,143 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:37,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-12-06 22:07:37,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:37,344 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2021-12-06 22:07:37,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722577109] [2021-12-06 22:07:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:37,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3061 proven. 1217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:38,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722577109] [2021-12-06 22:07:38,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722577109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596512249] [2021-12-06 22:07:38,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:07:38,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:38,935 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:38,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-06 22:07:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 22:07:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:41,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:41,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596512249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:41,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:41,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 146 [2021-12-06 22:07:41,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467323188] [2021-12-06 22:07:41,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:41,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-06 22:07:41,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-06 22:07:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=16413, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 22:07:41,231 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:42,485 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2021-12-06 22:07:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 22:07:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 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 191 [2021-12-06 22:07:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:42,486 INFO L225 Difference]: With dead ends: 338 [2021-12-06 22:07:42,486 INFO L226 Difference]: Without dead ends: 193 [2021-12-06 22:07:42,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8260 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8288, Invalid=29154, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 22:07:42,488 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:42,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 629 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:07:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-06 22:07:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-12-06 22:07:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2021-12-06 22:07:42,520 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2021-12-06 22:07:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:42,520 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2021-12-06 22:07:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2021-12-06 22:07:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 22:07:42,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:42,521 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:42,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-12-06 22:07:42,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:42,722 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2021-12-06 22:07:42,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:42,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981681056] [2021-12-06 22:07:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:42,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:43,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981681056] [2021-12-06 22:07:43,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981681056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221066885] [2021-12-06 22:07:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:07:43,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:43,382 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-06 22:07:43,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:07:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 22:07:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:43,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:43,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221066885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:43,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:43,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2021-12-06 22:07:43,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072914290] [2021-12-06 22:07:43,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:07:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:07:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:07:43,847 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:44,417 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2021-12-06 22:07:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 22:07:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 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 192 [2021-12-06 22:07:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:44,418 INFO L225 Difference]: With dead ends: 204 [2021-12-06 22:07:44,418 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 22:07:44,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 22:07:44,419 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:44,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 22:07:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-12-06 22:07:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-12-06 22:07:44,447 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2021-12-06 22:07:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:44,447 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-12-06 22:07:44,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-12-06 22:07:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 22:07:44,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:44,448 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:44,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-12-06 22:07:44,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-12-06 22:07:44,649 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2021-12-06 22:07:44,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:44,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141330140] [2021-12-06 22:07:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:44,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3198 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:46,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:46,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141330140] [2021-12-06 22:07:46,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141330140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:46,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616164835] [2021-12-06 22:07:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:07:46,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:46,310 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:46,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-06 22:07:46,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-12-06 22:07:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:46,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 22:07:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:48,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:48,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616164835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:48,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:48,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 149 [2021-12-06 22:07:48,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493665560] [2021-12-06 22:07:48,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:48,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-06 22:07:48,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-06 22:07:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=17098, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 22:07:48,922 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:50,194 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2021-12-06 22:07:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 22:07:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 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 195 [2021-12-06 22:07:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:50,195 INFO L225 Difference]: With dead ends: 345 [2021-12-06 22:07:50,195 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 22:07:50,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8604 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8632, Invalid=30374, Unknown=0, NotChecked=0, Total=39006 [2021-12-06 22:07:50,197 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 616 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:07:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 22:07:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-12-06 22:07:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-12-06 22:07:50,226 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2021-12-06 22:07:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:50,226 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-12-06 22:07:50,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-12-06 22:07:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 22:07:50,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:50,227 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:50,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-12-06 22:07:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:50,428 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2021-12-06 22:07:50,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:50,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302490483] [2021-12-06 22:07:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:50,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:51,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:51,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302490483] [2021-12-06 22:07:51,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302490483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:51,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652316101] [2021-12-06 22:07:51,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:07:51,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:51,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:51,035 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:51,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-06 22:07:51,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:07:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 22:07:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:51,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:51,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652316101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:51,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:51,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2021-12-06 22:07:51,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75619682] [2021-12-06 22:07:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:51,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 22:07:51,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 22:07:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 22:07:51,485 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:52,050 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-12-06 22:07:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-06 22:07:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 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 196 [2021-12-06 22:07:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:52,051 INFO L225 Difference]: With dead ends: 208 [2021-12-06 22:07:52,051 INFO L226 Difference]: Without dead ends: 206 [2021-12-06 22:07:52,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 22:07:52,052 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:52,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 37 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-06 22:07:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-12-06 22:07:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-12-06 22:07:52,081 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2021-12-06 22:07:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-12-06 22:07:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-12-06 22:07:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 22:07:52,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:52,083 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:52,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-12-06 22:07:52,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-06 22:07:52,284 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2021-12-06 22:07:52,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:52,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197193887] [2021-12-06 22:07:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:52,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3338 proven. 1318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:53,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197193887] [2021-12-06 22:07:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197193887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350459222] [2021-12-06 22:07:53,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:07:53,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:53,828 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:53,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-06 22:07:53,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-06 22:07:53,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 22:07:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:56,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350459222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:56,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 152 [2021-12-06 22:07:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119760537] [2021-12-06 22:07:56,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-12-06 22:07:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-12-06 22:07:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=17797, Unknown=0, NotChecked=0, Total=22952 [2021-12-06 22:07:56,474 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:57,853 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2021-12-06 22:07:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 22:07:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 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 199 [2021-12-06 22:07:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:57,854 INFO L225 Difference]: With dead ends: 352 [2021-12-06 22:07:57,854 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 22:07:57,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8955 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8983, Invalid=31619, Unknown=0, NotChecked=0, Total=40602 [2021-12-06 22:07:57,856 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:57,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 702 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:07:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 22:07:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-06 22:07:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-12-06 22:07:57,886 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2021-12-06 22:07:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:57,886 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-12-06 22:07:57,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-12-06 22:07:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-06 22:07:57,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:57,887 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:57,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-12-06 22:07:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-06 22:07:58,088 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:07:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2021-12-06 22:07:58,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:58,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399402528] [2021-12-06 22:07:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:58,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:58,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399402528] [2021-12-06 22:07:58,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399402528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738268127] [2021-12-06 22:07:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:07:58,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:58,771 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:58,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-06 22:07:58,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-12-06 22:07:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 22:07:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:59,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:07:59,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738268127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:59,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:59,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2021-12-06 22:07:59,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784088147] [2021-12-06 22:07:59,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:59,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 22:07:59,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 22:07:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 22:07:59,335 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:07:59,940 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2021-12-06 22:07:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 22:07:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 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 200 [2021-12-06 22:07:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:07:59,941 INFO L225 Difference]: With dead ends: 212 [2021-12-06 22:07:59,941 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 22:07:59,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 22:07:59,942 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:07:59,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 31 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:07:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 22:07:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-12-06 22:07:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-12-06 22:07:59,972 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2021-12-06 22:07:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:07:59,972 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-12-06 22:07:59,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-12-06 22:07:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 22:07:59,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:07:59,973 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:59,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-12-06 22:08:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:00,175 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2021-12-06 22:08:00,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:00,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672507958] [2021-12-06 22:08:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:00,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3481 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:01,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672507958] [2021-12-06 22:08:01,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672507958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348009227] [2021-12-06 22:08:01,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:08:01,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:01,930 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-06 22:08:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:02,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 22:08:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:04,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:04,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348009227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:04,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:04,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 155 [2021-12-06 22:08:04,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387727254] [2021-12-06 22:08:04,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:04,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-06 22:08:04,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-06 22:08:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=18510, Unknown=0, NotChecked=0, Total=23870 [2021-12-06 22:08:04,447 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:05,820 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2021-12-06 22:08:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-06 22:08:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 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 203 [2021-12-06 22:08:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:05,821 INFO L225 Difference]: With dead ends: 359 [2021-12-06 22:08:05,821 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 22:08:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9313 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9341, Invalid=32889, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 22:08:05,823 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:05,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 644 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 22:08:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-06 22:08:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-12-06 22:08:05,859 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2021-12-06 22:08:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-12-06 22:08:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-12-06 22:08:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 22:08:05,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:05,860 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:05,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-12-06 22:08:06,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:06,061 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:06,062 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2021-12-06 22:08:06,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200249562] [2021-12-06 22:08:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:06,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:06,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200249562] [2021-12-06 22:08:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200249562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045760373] [2021-12-06 22:08:06,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:08:06,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:06,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:06,736 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:06,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-06 22:08:06,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:08:06,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 22:08:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:07,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:07,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045760373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:07,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:07,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2021-12-06 22:08:07,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111169406] [2021-12-06 22:08:07,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:07,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 22:08:07,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 22:08:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 22:08:07,200 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:07,863 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2021-12-06 22:08:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 22:08:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 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 204 [2021-12-06 22:08:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:07,864 INFO L225 Difference]: With dead ends: 216 [2021-12-06 22:08:07,864 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 22:08:07,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 22:08:07,865 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:07,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 27 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 22:08:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2021-12-06 22:08:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2021-12-06 22:08:07,897 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2021-12-06 22:08:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:07,897 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2021-12-06 22:08:07,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2021-12-06 22:08:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 22:08:07,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:07,898 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:07,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-12-06 22:08:08,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:08,099 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2021-12-06 22:08:08,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164663456] [2021-12-06 22:08:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:08,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3627 proven. 1423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:10,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164663456] [2021-12-06 22:08:10,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164663456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179262254] [2021-12-06 22:08:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:08:10,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:10,054 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:10,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-06 22:08:10,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-12-06 22:08:10,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:10,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 22:08:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:12,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:12,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179262254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:12,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:12,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 158 [2021-12-06 22:08:12,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087649086] [2021-12-06 22:08:12,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:12,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-06 22:08:12,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-06 22:08:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5569, Invalid=19237, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:08:12,813 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:14,183 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2021-12-06 22:08:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 22:08:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 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 207 [2021-12-06 22:08:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:14,184 INFO L225 Difference]: With dead ends: 366 [2021-12-06 22:08:14,184 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 22:08:14,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9678 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9706, Invalid=34184, Unknown=0, NotChecked=0, Total=43890 [2021-12-06 22:08:14,186 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:14,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 593 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 22:08:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-06 22:08:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-12-06 22:08:14,225 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 207 [2021-12-06 22:08:14,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:14,225 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-12-06 22:08:14,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-12-06 22:08:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 22:08:14,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:14,226 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:14,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-12-06 22:08:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-06 22:08:14,427 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash 434553836, now seen corresponding path program 100 times [2021-12-06 22:08:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770594100] [2021-12-06 22:08:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:14,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:15,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770594100] [2021-12-06 22:08:15,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770594100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511112173] [2021-12-06 22:08:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:08:15,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:15,133 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-06 22:08:15,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:08:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 22:08:15,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:15,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511112173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:15,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2021-12-06 22:08:15,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979475357] [2021-12-06 22:08:15,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 22:08:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 22:08:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 22:08:15,609 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:16,246 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2021-12-06 22:08:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 22:08:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 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 208 [2021-12-06 22:08:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:16,247 INFO L225 Difference]: With dead ends: 220 [2021-12-06 22:08:16,247 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 22:08:16,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4407, Invalid=7583, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 22:08:16,248 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:16,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 33 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 22:08:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2021-12-06 22:08:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2021-12-06 22:08:16,281 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 208 [2021-12-06 22:08:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2021-12-06 22:08:16,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2021-12-06 22:08:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 22:08:16,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:16,282 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:16,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-12-06 22:08:16,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 22:08:16,483 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash 766718413, now seen corresponding path program 101 times [2021-12-06 22:08:16,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:16,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629850935] [2021-12-06 22:08:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:16,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3776 proven. 1477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:18,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:18,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629850935] [2021-12-06 22:08:18,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629850935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:18,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820722265] [2021-12-06 22:08:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:08:18,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:18,238 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:18,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-06 22:08:18,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-12-06 22:08:18,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 22:08:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:20,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:21,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820722265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:21,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:21,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 161 [2021-12-06 22:08:21,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518774046] [2021-12-06 22:08:21,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:21,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-06 22:08:21,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-06 22:08:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5782, Invalid=19978, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 22:08:21,191 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:22,590 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2021-12-06 22:08:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 22:08:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 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 211 [2021-12-06 22:08:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:22,590 INFO L225 Difference]: With dead ends: 373 [2021-12-06 22:08:22,590 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 22:08:22,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10050 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10078, Invalid=35504, Unknown=0, NotChecked=0, Total=45582 [2021-12-06 22:08:22,592 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:22,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 588 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 22:08:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-06 22:08:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-12-06 22:08:22,625 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 211 [2021-12-06 22:08:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:22,625 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-12-06 22:08:22,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-12-06 22:08:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-06 22:08:22,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:22,626 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:22,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-12-06 22:08:22,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-06 22:08:22,827 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 410910600, now seen corresponding path program 102 times [2021-12-06 22:08:22,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:22,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170386365] [2021-12-06 22:08:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:22,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:23,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170386365] [2021-12-06 22:08:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170386365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688599668] [2021-12-06 22:08:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:08:23,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:23,544 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:23,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-06 22:08:23,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2021-12-06 22:08:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 22:08:23,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:24,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688599668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:24,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:24,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2021-12-06 22:08:24,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085297948] [2021-12-06 22:08:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:24,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 22:08:24,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:24,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 22:08:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 22:08:24,118 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:24,756 INFO L93 Difference]: Finished difference Result 224 states and 225 transitions. [2021-12-06 22:08:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-06 22:08:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 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 212 [2021-12-06 22:08:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:24,757 INFO L225 Difference]: With dead ends: 224 [2021-12-06 22:08:24,757 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 22:08:24,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4571, Invalid=7861, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 22:08:24,758 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:24,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 37 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 22:08:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2021-12-06 22:08:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2021-12-06 22:08:24,791 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2021-12-06 22:08:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:24,792 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2021-12-06 22:08:24,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2021-12-06 22:08:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 22:08:24,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:24,793 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:24,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-12-06 22:08:24,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-06 22:08:24,994 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 785711281, now seen corresponding path program 103 times [2021-12-06 22:08:24,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:24,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436313597] [2021-12-06 22:08:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 3928 proven. 1532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:26,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436313597] [2021-12-06 22:08:26,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436313597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715448655] [2021-12-06 22:08:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:08:26,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:26,857 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-12-06 22:08:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 22:08:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:29,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715448655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:29,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:29,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 164 [2021-12-06 22:08:29,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630805935] [2021-12-06 22:08:29,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:29,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-06 22:08:29,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-06 22:08:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5999, Invalid=20733, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 22:08:29,850 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:31,338 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2021-12-06 22:08:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 22:08:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 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 215 [2021-12-06 22:08:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:31,339 INFO L225 Difference]: With dead ends: 380 [2021-12-06 22:08:31,339 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 22:08:31,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=10457, Invalid=36849, Unknown=0, NotChecked=0, Total=47306 [2021-12-06 22:08:31,341 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:31,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 668 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 22:08:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-12-06 22:08:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-12-06 22:08:31,379 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 215 [2021-12-06 22:08:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-12-06 22:08:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-12-06 22:08:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 22:08:31,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:31,380 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:31,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-12-06 22:08:31,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-12-06 22:08:31,581 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash -138643220, now seen corresponding path program 104 times [2021-12-06 22:08:31,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:31,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423436360] [2021-12-06 22:08:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:31,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1378 proven. 4135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:32,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423436360] [2021-12-06 22:08:32,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423436360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701176099] [2021-12-06 22:08:32,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:08:32,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:32,336 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:32,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-12-06 22:08:32,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:08:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 22:08:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:32,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:32,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701176099] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:32,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:32,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 59 [2021-12-06 22:08:32,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112200281] [2021-12-06 22:08:32,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:32,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:08:32,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:08:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 22:08:32,857 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:33,558 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2021-12-06 22:08:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 22:08:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 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 216 [2021-12-06 22:08:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:33,559 INFO L225 Difference]: With dead ends: 228 [2021-12-06 22:08:33,559 INFO L226 Difference]: Without dead ends: 226 [2021-12-06 22:08:33,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 480 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4738, Invalid=8144, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 22:08:33,559 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:33,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 38 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-06 22:08:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2021-12-06 22:08:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 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) [2021-12-06 22:08:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-12-06 22:08:33,598 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 216 [2021-12-06 22:08:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-12-06 22:08:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-12-06 22:08:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 22:08:33,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:33,599 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:33,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-12-06 22:08:33,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:33,800 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1443192013, now seen corresponding path program 105 times [2021-12-06 22:08:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033395785] [2021-12-06 22:08:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:33,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4083 proven. 1588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:35,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033395785] [2021-12-06 22:08:35,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033395785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128342266] [2021-12-06 22:08:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:08:35,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:35,754 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:35,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-12-06 22:08:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-12-06 22:08:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 22:08:35,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:38,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128342266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:38,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:38,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 167 [2021-12-06 22:08:38,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527616788] [2021-12-06 22:08:38,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-06 22:08:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-06 22:08:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6220, Invalid=21502, Unknown=0, NotChecked=0, Total=27722 [2021-12-06 22:08:38,915 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:40,498 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2021-12-06 22:08:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-06 22:08:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 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 219 [2021-12-06 22:08:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:40,499 INFO L225 Difference]: With dead ends: 387 [2021-12-06 22:08:40,499 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 22:08:40,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10815 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10843, Invalid=38219, Unknown=0, NotChecked=0, Total=49062 [2021-12-06 22:08:40,501 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 11 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:40,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 654 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 22:08:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-12-06 22:08:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-12-06 22:08:40,536 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 219 [2021-12-06 22:08:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:40,536 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-12-06 22:08:40,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-12-06 22:08:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 22:08:40,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:40,537 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:40,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-12-06 22:08:40,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:40,739 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash -240107640, now seen corresponding path program 106 times [2021-12-06 22:08:40,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933610894] [2021-12-06 22:08:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:40,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1431 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:41,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933610894] [2021-12-06 22:08:41,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933610894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981966162] [2021-12-06 22:08:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:08:41,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:41,541 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:41,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-12-06 22:08:41,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:08:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 22:08:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:41,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:42,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981966162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:42,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:42,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 60 [2021-12-06 22:08:42,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101159667] [2021-12-06 22:08:42,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:42,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 22:08:42,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 22:08:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:08:42,079 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:42,771 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2021-12-06 22:08:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-06 22:08:42,771 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 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 220 [2021-12-06 22:08:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:42,772 INFO L225 Difference]: With dead ends: 232 [2021-12-06 22:08:42,772 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 22:08:42,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 489 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4908, Invalid=8432, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 22:08:42,772 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 228 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:42,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 34 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 22:08:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2021-12-06 22:08:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2021-12-06 22:08:42,808 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 220 [2021-12-06 22:08:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:42,809 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2021-12-06 22:08:42,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2021-12-06 22:08:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-06 22:08:42,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:42,809 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-12-06 22:08:43,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-12-06 22:08:43,011 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1921335119, now seen corresponding path program 107 times [2021-12-06 22:08:43,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223282370] [2021-12-06 22:08:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:43,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4241 proven. 1645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:44,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223282370] [2021-12-06 22:08:44,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223282370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892755803] [2021-12-06 22:08:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:08:44,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:44,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:44,985 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:44,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-12-06 22:08:45,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-12-06 22:08:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:45,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 22:08:45,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:48,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:48,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892755803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:48,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:48,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 170 [2021-12-06 22:08:48,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34224584] [2021-12-06 22:08:48,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:48,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2021-12-06 22:08:48,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-12-06 22:08:48,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6445, Invalid=22285, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 22:08:48,287 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:49,985 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2021-12-06 22:08:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 22:08:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 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 223 [2021-12-06 22:08:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:49,985 INFO L225 Difference]: With dead ends: 394 [2021-12-06 22:08:49,985 INFO L226 Difference]: Without dead ends: 225 [2021-12-06 22:08:49,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11208 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=11236, Invalid=39614, Unknown=0, NotChecked=0, Total=50850 [2021-12-06 22:08:49,988 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 11 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:49,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 797 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:08:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-06 22:08:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-12-06 22:08:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-12-06 22:08:50,030 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 223 [2021-12-06 22:08:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:50,030 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-12-06 22:08:50,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-12-06 22:08:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 22:08:50,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:50,031 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:50,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-12-06 22:08:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:50,232 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1087386132, now seen corresponding path program 108 times [2021-12-06 22:08:50,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:50,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196844790] [2021-12-06 22:08:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1485 proven. 4456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:51,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196844790] [2021-12-06 22:08:51,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196844790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234891290] [2021-12-06 22:08:51,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:08:51,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:51,041 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:51,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-12-06 22:08:51,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-12-06 22:08:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:08:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 22:08:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:51,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234891290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:51,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:51,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 61 [2021-12-06 22:08:51,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645528616] [2021-12-06 22:08:51,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:51,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 22:08:51,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 22:08:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:08:51,688 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:52,430 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2021-12-06 22:08:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 22:08:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 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 224 [2021-12-06 22:08:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:52,431 INFO L225 Difference]: With dead ends: 236 [2021-12-06 22:08:52,431 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 22:08:52,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5081, Invalid=8725, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 22:08:52,432 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 183 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:52,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 37 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:08:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 22:08:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-12-06 22:08:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2021-12-06 22:08:52,470 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2021-12-06 22:08:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:52,470 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2021-12-06 22:08:52,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2021-12-06 22:08:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-06 22:08:52,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:52,471 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:52,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-12-06 22:08:52,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-12-06 22:08:52,672 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1672091699, now seen corresponding path program 109 times [2021-12-06 22:08:52,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:52,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983731066] [2021-12-06 22:08:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:52,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4402 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:54,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983731066] [2021-12-06 22:08:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983731066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:08:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739517016] [2021-12-06 22:08:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:08:54,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:08:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:08:54,673 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:08:54,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-12-06 22:08:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 22:08:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:08:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:57,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:08:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:08:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739517016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:08:57,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:08:57,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 173 [2021-12-06 22:08:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212386775] [2021-12-06 22:08:57,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:08:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-12-06 22:08:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-12-06 22:08:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6674, Invalid=23082, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 22:08:57,850 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:08:59,580 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2021-12-06 22:08:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-06 22:08:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 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 227 [2021-12-06 22:08:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:08:59,581 INFO L225 Difference]: With dead ends: 401 [2021-12-06 22:08:59,581 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 22:08:59,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11608 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=11636, Invalid=41034, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 22:08:59,584 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:08:59,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 734 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:08:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 22:08:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-06 22:08:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-12-06 22:08:59,626 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 227 [2021-12-06 22:08:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:08:59,626 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-12-06 22:08:59,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-12-06 22:08:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 22:08:59,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:08:59,627 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:59,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-12-06 22:08:59,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-12-06 22:08:59,828 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:08:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1510219896, now seen corresponding path program 110 times [2021-12-06 22:08:59,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239976668] [2021-12-06 22:08:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:59,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1540 proven. 4621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:00,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239976668] [2021-12-06 22:09:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239976668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744285189] [2021-12-06 22:09:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:09:00,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:00,649 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:00,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-12-06 22:09:00,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:09:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:00,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 22:09:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:00,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744285189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:01,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:01,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 62 [2021-12-06 22:09:01,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487172598] [2021-12-06 22:09:01,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:01,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 22:09:01,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 22:09:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:09:01,163 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:01,935 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2021-12-06 22:09:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-06 22:09:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 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 228 [2021-12-06 22:09:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:01,935 INFO L225 Difference]: With dead ends: 240 [2021-12-06 22:09:01,935 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 22:09:01,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 507 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5257, Invalid=9023, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 22:09:01,936 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:01,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 23 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 22:09:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2021-12-06 22:09:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2021-12-06 22:09:01,975 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 228 [2021-12-06 22:09:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:01,975 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2021-12-06 22:09:01,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2021-12-06 22:09:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-06 22:09:01,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:01,976 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:01,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-12-06 22:09:02,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-12-06 22:09:02,177 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1173675855, now seen corresponding path program 111 times [2021-12-06 22:09:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895192539] [2021-12-06 22:09:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:02,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4566 proven. 1762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:04,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895192539] [2021-12-06 22:09:04,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895192539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395725393] [2021-12-06 22:09:04,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:09:04,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:04,352 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:04,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-12-06 22:09:04,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-12-06 22:09:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 22:09:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:07,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:07,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395725393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:07,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:07,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 176 [2021-12-06 22:09:07,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757585636] [2021-12-06 22:09:07,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-12-06 22:09:07,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-12-06 22:09:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6907, Invalid=23893, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 22:09:07,714 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:09,461 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2021-12-06 22:09:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 22:09:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 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 231 [2021-12-06 22:09:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:09,462 INFO L225 Difference]: With dead ends: 408 [2021-12-06 22:09:09,462 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 22:09:09,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12015 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=12043, Invalid=42479, Unknown=0, NotChecked=0, Total=54522 [2021-12-06 22:09:09,464 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 11 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:09,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 832 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:09:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 22:09:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-12-06 22:09:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-12-06 22:09:09,503 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 231 [2021-12-06 22:09:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:09,503 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-12-06 22:09:09,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-12-06 22:09:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 22:09:09,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:09,504 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:09,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-12-06 22:09:09,705 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 203997932, now seen corresponding path program 112 times [2021-12-06 22:09:09,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:09,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510433418] [2021-12-06 22:09:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:09,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1596 proven. 4789 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:10,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510433418] [2021-12-06 22:09:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510433418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054131348] [2021-12-06 22:09:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:09:10,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:10,531 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-12-06 22:09:10,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:09:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 22:09:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:10,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:11,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054131348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:11,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:11,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 63 [2021-12-06 22:09:11,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312413002] [2021-12-06 22:09:11,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:11,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 22:09:11,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 22:09:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 22:09:11,058 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:11,796 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2021-12-06 22:09:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 22:09:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 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 232 [2021-12-06 22:09:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:11,797 INFO L225 Difference]: With dead ends: 244 [2021-12-06 22:09:11,797 INFO L226 Difference]: Without dead ends: 242 [2021-12-06 22:09:11,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 516 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5436, Invalid=9326, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 22:09:11,798 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:11,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 38 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-06 22:09:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2021-12-06 22:09:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2021-12-06 22:09:11,838 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2021-12-06 22:09:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2021-12-06 22:09:11,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2021-12-06 22:09:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 22:09:11,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:11,839 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:11,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:12,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-12-06 22:09:12,040 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash -71511347, now seen corresponding path program 113 times [2021-12-06 22:09:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16197675] [2021-12-06 22:09:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:12,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4733 proven. 1822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:14,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16197675] [2021-12-06 22:09:14,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16197675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662762569] [2021-12-06 22:09:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:09:14,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:14,253 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:14,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-12-06 22:09:14,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-12-06 22:09:14,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-06 22:09:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:17,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:17,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662762569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:17,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:17,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119, 119] total 179 [2021-12-06 22:09:17,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693252136] [2021-12-06 22:09:17,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-12-06 22:09:17,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-12-06 22:09:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7144, Invalid=24718, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 22:09:17,713 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:19,558 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2021-12-06 22:09:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-06 22:09:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 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 235 [2021-12-06 22:09:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:19,559 INFO L225 Difference]: With dead ends: 415 [2021-12-06 22:09:19,559 INFO L226 Difference]: Without dead ends: 237 [2021-12-06 22:09:19,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12429 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=12457, Invalid=43949, Unknown=0, NotChecked=0, Total=56406 [2021-12-06 22:09:19,561 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:19,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 816 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:09:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-06 22:09:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-12-06 22:09:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-12-06 22:09:19,602 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 235 [2021-12-06 22:09:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:19,602 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-12-06 22:09:19,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-12-06 22:09:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 22:09:19,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:19,603 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:19,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:19,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-12-06 22:09:19,804 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -445063288, now seen corresponding path program 114 times [2021-12-06 22:09:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128644152] [2021-12-06 22:09:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:19,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1653 proven. 4960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:20,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128644152] [2021-12-06 22:09:20,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128644152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230597207] [2021-12-06 22:09:20,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:09:20,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:20,685 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:20,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-12-06 22:09:20,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2021-12-06 22:09:20,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 22:09:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:21,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:21,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230597207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:21,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:21,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 64 [2021-12-06 22:09:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248774094] [2021-12-06 22:09:21,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 22:09:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 22:09:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:09:21,338 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:22,160 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2021-12-06 22:09:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-06 22:09:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 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 236 [2021-12-06 22:09:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:22,161 INFO L225 Difference]: With dead ends: 248 [2021-12-06 22:09:22,161 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 22:09:22,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5618, Invalid=9634, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 22:09:22,162 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 187 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:22,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 32 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 22:09:22,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2021-12-06 22:09:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2021-12-06 22:09:22,203 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2021-12-06 22:09:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:22,203 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2021-12-06 22:09:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2021-12-06 22:09:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 22:09:22,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:22,204 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:22,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:22,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:22,405 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -311549775, now seen corresponding path program 115 times [2021-12-06 22:09:22,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143585013] [2021-12-06 22:09:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:22,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 4903 proven. 1883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:24,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:24,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143585013] [2021-12-06 22:09:24,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143585013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:24,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171679773] [2021-12-06 22:09:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:09:24,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:24,660 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:24,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-12-06 22:09:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 22:09:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:27,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:28,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171679773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:28,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:28,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 182 [2021-12-06 22:09:28,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758352465] [2021-12-06 22:09:28,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2021-12-06 22:09:28,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2021-12-06 22:09:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7385, Invalid=25557, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 22:09:28,136 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:29,959 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2021-12-06 22:09:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 22:09:29,959 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 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 239 [2021-12-06 22:09:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:29,960 INFO L225 Difference]: With dead ends: 422 [2021-12-06 22:09:29,960 INFO L226 Difference]: Without dead ends: 241 [2021-12-06 22:09:29,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12850 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=12878, Invalid=45444, Unknown=0, NotChecked=0, Total=58322 [2021-12-06 22:09:29,962 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:29,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 674 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:09:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-06 22:09:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-12-06 22:09:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-12-06 22:09:30,009 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 239 [2021-12-06 22:09:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:30,009 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-12-06 22:09:30,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-12-06 22:09:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 22:09:30,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:30,010 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:30,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:30,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-12-06 22:09:30,211 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1284462572, now seen corresponding path program 116 times [2021-12-06 22:09:30,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:30,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758273511] [2021-12-06 22:09:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:30,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1711 proven. 5134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:31,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758273511] [2021-12-06 22:09:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758273511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283462366] [2021-12-06 22:09:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:09:31,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:31,121 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:31,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-12-06 22:09:31,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:09:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 22:09:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:31,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283462366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:31,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:31,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 65 [2021-12-06 22:09:31,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079791304] [2021-12-06 22:09:31,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:31,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 22:09:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 22:09:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:09:31,679 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:32,473 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2021-12-06 22:09:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 22:09:32,473 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 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 240 [2021-12-06 22:09:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:32,473 INFO L225 Difference]: With dead ends: 252 [2021-12-06 22:09:32,473 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 22:09:32,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3951 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5803, Invalid=9947, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 22:09:32,474 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 252 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:32,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 35 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 22:09:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2021-12-06 22:09:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2021-12-06 22:09:32,517 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 240 [2021-12-06 22:09:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:32,517 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2021-12-06 22:09:32,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2021-12-06 22:09:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-06 22:09:32,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:32,518 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:32,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-12-06 22:09:32,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-12-06 22:09:32,719 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1565662669, now seen corresponding path program 117 times [2021-12-06 22:09:32,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:32,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801867186] [2021-12-06 22:09:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:32,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5076 proven. 1945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:35,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801867186] [2021-12-06 22:09:35,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801867186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698209027] [2021-12-06 22:09:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:09:35,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:35,295 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:35,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-12-06 22:09:35,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-12-06 22:09:35,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-06 22:09:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:38,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:39,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698209027] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:39,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:39,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 185 [2021-12-06 22:09:39,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322478489] [2021-12-06 22:09:39,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:39,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-06 22:09:39,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:39,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-06 22:09:39,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7630, Invalid=26410, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 22:09:39,132 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:41,103 INFO L93 Difference]: Finished difference Result 429 states and 431 transitions. [2021-12-06 22:09:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-06 22:09:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 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 243 [2021-12-06 22:09:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:41,104 INFO L225 Difference]: With dead ends: 429 [2021-12-06 22:09:41,104 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 22:09:41,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13278 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=13306, Invalid=46964, Unknown=0, NotChecked=0, Total=60270 [2021-12-06 22:09:41,107 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 11 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:41,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 807 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:09:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 22:09:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-12-06 22:09:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-12-06 22:09:41,154 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 243 [2021-12-06 22:09:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:41,154 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-12-06 22:09:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-12-06 22:09:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 22:09:41,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:41,155 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:41,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-12-06 22:09:41,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:41,356 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1312767880, now seen corresponding path program 118 times [2021-12-06 22:09:41,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434318402] [2021-12-06 22:09:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:41,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1770 proven. 5311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:42,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434318402] [2021-12-06 22:09:42,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434318402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618353588] [2021-12-06 22:09:42,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:09:42,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:42,364 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:42,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-12-06 22:09:42,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:09:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 22:09:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:42,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:42,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618353588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:42,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:42,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 66 [2021-12-06 22:09:42,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245896247] [2021-12-06 22:09:42,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 22:09:42,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 22:09:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:09:42,939 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:43,854 INFO L93 Difference]: Finished difference Result 256 states and 257 transitions. [2021-12-06 22:09:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 22:09:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 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 244 [2021-12-06 22:09:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:43,855 INFO L225 Difference]: With dead ends: 256 [2021-12-06 22:09:43,855 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 22:09:43,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 543 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5991, Invalid=10265, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 22:09:43,856 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 200 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:43,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 36 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 22:09:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-12-06 22:09:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 249 transitions. [2021-12-06 22:09:43,902 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 249 transitions. Word has length 244 [2021-12-06 22:09:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 249 transitions. [2021-12-06 22:09:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 249 transitions. [2021-12-06 22:09:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-06 22:09:43,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:43,906 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:43,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-12-06 22:09:44,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:44,107 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1299464015, now seen corresponding path program 119 times [2021-12-06 22:09:44,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:44,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371234306] [2021-12-06 22:09:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:44,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5252 proven. 2008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:46,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371234306] [2021-12-06 22:09:46,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371234306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510839024] [2021-12-06 22:09:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:09:46,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:46,451 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:46,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-12-06 22:09:46,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-12-06 22:09:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-06 22:09:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:50,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510839024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:50,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:50,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 188 [2021-12-06 22:09:50,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649467671] [2021-12-06 22:09:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:50,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2021-12-06 22:09:50,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2021-12-06 22:09:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7879, Invalid=27277, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 22:09:50,380 INFO L87 Difference]: Start difference. First operand 248 states and 249 transitions. Second operand has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:52,372 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2021-12-06 22:09:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 22:09:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 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 247 [2021-12-06 22:09:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:52,372 INFO L225 Difference]: With dead ends: 436 [2021-12-06 22:09:52,372 INFO L226 Difference]: Without dead ends: 249 [2021-12-06 22:09:52,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13713 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=13741, Invalid=48509, Unknown=0, NotChecked=0, Total=62250 [2021-12-06 22:09:52,375 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 11 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:52,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 679 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:09:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-06 22:09:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-12-06 22:09:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-12-06 22:09:52,425 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 247 [2021-12-06 22:09:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:52,425 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-12-06 22:09:52,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-12-06 22:09:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-06 22:09:52,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:52,426 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:52,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-12-06 22:09:52,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:52,627 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1078693100, now seen corresponding path program 120 times [2021-12-06 22:09:52,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148586698] [2021-12-06 22:09:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:52,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1830 proven. 5491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:53,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148586698] [2021-12-06 22:09:53,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148586698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949908297] [2021-12-06 22:09:53,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:09:53,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:53,532 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:53,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-12-06 22:09:53,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-12-06 22:09:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 22:09:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:54,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949908297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:54,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:54,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 67 [2021-12-06 22:09:54,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911237020] [2021-12-06 22:09:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:54,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 22:09:54,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 22:09:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 22:09:54,234 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:09:55,153 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2021-12-06 22:09:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 22:09:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 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 248 [2021-12-06 22:09:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:09:55,153 INFO L225 Difference]: With dead ends: 260 [2021-12-06 22:09:55,153 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 22:09:55,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 552 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=6182, Invalid=10588, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 22:09:55,154 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 131 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:09:55,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 31 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:09:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 22:09:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-12-06 22:09:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2021-12-06 22:09:55,205 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 248 [2021-12-06 22:09:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:09:55,205 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2021-12-06 22:09:55,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2021-12-06 22:09:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-06 22:09:55,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:09:55,206 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:55,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-12-06 22:09:55,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:55,407 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:09:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 405653709, now seen corresponding path program 121 times [2021-12-06 22:09:55,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782774357] [2021-12-06 22:09:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:55,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5431 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:09:57,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782774357] [2021-12-06 22:09:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782774357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218267421] [2021-12-06 22:09:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:09:57,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:57,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:57,923 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-12-06 22:09:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-06 22:09:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:01,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:01,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218267421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:01,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:01,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 191 [2021-12-06 22:10:01,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745612164] [2021-12-06 22:10:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:01,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-12-06 22:10:01,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-12-06 22:10:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8132, Invalid=28158, Unknown=0, NotChecked=0, Total=36290 [2021-12-06 22:10:01,503 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:03,663 INFO L93 Difference]: Finished difference Result 443 states and 445 transitions. [2021-12-06 22:10:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 22:10:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 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 251 [2021-12-06 22:10:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:03,663 INFO L225 Difference]: With dead ends: 443 [2021-12-06 22:10:03,663 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 22:10:03,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14155 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=14183, Invalid=50079, Unknown=0, NotChecked=0, Total=64262 [2021-12-06 22:10:03,666 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:03,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1022 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:10:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 22:10:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-12-06 22:10:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-12-06 22:10:03,717 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 251 [2021-12-06 22:10:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:03,717 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-12-06 22:10:03,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-12-06 22:10:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 22:10:03,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:03,718 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:03,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-12-06 22:10:03,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:03,919 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -328794232, now seen corresponding path program 122 times [2021-12-06 22:10:03,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103068235] [2021-12-06 22:10:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:03,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1891 proven. 5674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:04,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:04,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103068235] [2021-12-06 22:10:04,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103068235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:04,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858007401] [2021-12-06 22:10:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:10:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:04,953 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:04,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-12-06 22:10:05,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:10:05,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 22:10:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:05,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:05,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858007401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:05,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2021-12-06 22:10:05,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16109096] [2021-12-06 22:10:05,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:05,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 22:10:05,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 22:10:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:10:05,585 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:06,477 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2021-12-06 22:10:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-06 22:10:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 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 252 [2021-12-06 22:10:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:06,477 INFO L225 Difference]: With dead ends: 264 [2021-12-06 22:10:06,478 INFO L226 Difference]: Without dead ends: 262 [2021-12-06 22:10:06,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 561 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4338 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=6376, Invalid=10916, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 22:10:06,479 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:06,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 31 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:10:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-06 22:10:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2021-12-06 22:10:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.007843137254902) internal successors, (257), 255 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2021-12-06 22:10:06,530 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 252 [2021-12-06 22:10:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:06,530 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2021-12-06 22:10:06,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2021-12-06 22:10:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-06 22:10:06,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:06,531 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:06,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-12-06 22:10:06,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-12-06 22:10:06,732 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1716256945, now seen corresponding path program 123 times [2021-12-06 22:10:06,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612390564] [2021-12-06 22:10:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:06,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5613 proven. 2137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:09,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:09,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612390564] [2021-12-06 22:10:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612390564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:09,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678218528] [2021-12-06 22:10:09,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:10:09,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:09,416 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:09,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-12-06 22:10:09,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-12-06 22:10:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-06 22:10:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:13,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678218528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:13,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:13,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 194 [2021-12-06 22:10:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899499385] [2021-12-06 22:10:13,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-06 22:10:13,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-06 22:10:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8389, Invalid=29053, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 22:10:13,413 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:15,707 INFO L93 Difference]: Finished difference Result 450 states and 452 transitions. [2021-12-06 22:10:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 22:10:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 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 255 [2021-12-06 22:10:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:15,707 INFO L225 Difference]: With dead ends: 450 [2021-12-06 22:10:15,707 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 22:10:15,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14604 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=14632, Invalid=51674, Unknown=0, NotChecked=0, Total=66306 [2021-12-06 22:10:15,710 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 11 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:15,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 916 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:10:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 22:10:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-12-06 22:10:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2021-12-06 22:10:15,758 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 255 [2021-12-06 22:10:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:15,758 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2021-12-06 22:10:15,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2021-12-06 22:10:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-06 22:10:15,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:15,759 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:15,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-12-06 22:10:15,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-12-06 22:10:15,960 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2034590188, now seen corresponding path program 124 times [2021-12-06 22:10:15,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659513131] [2021-12-06 22:10:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:15,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 1953 proven. 5860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:16,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659513131] [2021-12-06 22:10:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659513131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668130904] [2021-12-06 22:10:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:10:16,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:16,971 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:16,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-12-06 22:10:17,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:10:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-06 22:10:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:17,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668130904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:17,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:17,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 69 [2021-12-06 22:10:17,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019721282] [2021-12-06 22:10:17,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:17,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 22:10:17,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 22:10:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 22:10:17,548 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:18,517 INFO L93 Difference]: Finished difference Result 268 states and 269 transitions. [2021-12-06 22:10:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-12-06 22:10:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 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 256 [2021-12-06 22:10:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:18,518 INFO L225 Difference]: With dead ends: 268 [2021-12-06 22:10:18,518 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 22:10:18,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 570 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=6573, Invalid=11249, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 22:10:18,519 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 274 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:18,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 28 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:10:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 22:10:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-12-06 22:10:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2021-12-06 22:10:18,571 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 256 [2021-12-06 22:10:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:18,572 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2021-12-06 22:10:18,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2021-12-06 22:10:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-06 22:10:18,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:18,572 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:18,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-12-06 22:10:18,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-12-06 22:10:18,774 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1902629837, now seen corresponding path program 125 times [2021-12-06 22:10:18,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:18,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685733757] [2021-12-06 22:10:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:18,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5798 proven. 2203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:21,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685733757] [2021-12-06 22:10:21,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685733757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815287044] [2021-12-06 22:10:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:10:21,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:21,529 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:21,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-12-06 22:10:21,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2021-12-06 22:10:21,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-06 22:10:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:25,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:25,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815287044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:25,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:25,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 197 [2021-12-06 22:10:25,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984246072] [2021-12-06 22:10:25,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:25,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-12-06 22:10:25,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-12-06 22:10:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8650, Invalid=29962, Unknown=0, NotChecked=0, Total=38612 [2021-12-06 22:10:25,600 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:27,813 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2021-12-06 22:10:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-06 22:10:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 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 259 [2021-12-06 22:10:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:27,814 INFO L225 Difference]: With dead ends: 457 [2021-12-06 22:10:27,814 INFO L226 Difference]: Without dead ends: 261 [2021-12-06 22:10:27,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15060 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=15088, Invalid=53294, Unknown=0, NotChecked=0, Total=68382 [2021-12-06 22:10:27,817 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:27,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 865 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:10:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-06 22:10:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-12-06 22:10:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-12-06 22:10:27,881 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 259 [2021-12-06 22:10:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-12-06 22:10:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-12-06 22:10:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-06 22:10:27,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:27,883 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:27,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-12-06 22:10:28,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-12-06 22:10:28,084 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:28,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1173872760, now seen corresponding path program 126 times [2021-12-06 22:10:28,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:28,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448222482] [2021-12-06 22:10:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:28,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2016 proven. 6049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:29,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448222482] [2021-12-06 22:10:29,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448222482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806010247] [2021-12-06 22:10:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:10:29,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:29,104 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:29,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-12-06 22:10:29,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2021-12-06 22:10:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 22:10:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:29,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:29,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806010247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:29,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:29,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2021-12-06 22:10:29,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748556376] [2021-12-06 22:10:29,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:29,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 22:10:29,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 22:10:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 22:10:29,863 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:30,768 INFO L93 Difference]: Finished difference Result 272 states and 273 transitions. [2021-12-06 22:10:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-06 22:10:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 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 260 [2021-12-06 22:10:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:30,769 INFO L225 Difference]: With dead ends: 272 [2021-12-06 22:10:30,769 INFO L226 Difference]: Without dead ends: 270 [2021-12-06 22:10:30,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=6773, Invalid=11587, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 22:10:30,770 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 272 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:30,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 47 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:10:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-06 22:10:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-12-06 22:10:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2021-12-06 22:10:30,822 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 260 [2021-12-06 22:10:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:30,822 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2021-12-06 22:10:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2021-12-06 22:10:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-06 22:10:30,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:30,823 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-12-06 22:10:31,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:31,024 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1214848847, now seen corresponding path program 127 times [2021-12-06 22:10:31,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487727687] [2021-12-06 22:10:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:31,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 5986 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:33,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:33,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487727687] [2021-12-06 22:10:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487727687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650035317] [2021-12-06 22:10:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:10:33,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:33,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:33,806 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:33,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-12-06 22:10:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 22:10:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:37,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:37,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650035317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:37,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:37,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 200 [2021-12-06 22:10:37,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004994468] [2021-12-06 22:10:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:37,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2021-12-06 22:10:37,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2021-12-06 22:10:37,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8915, Invalid=30885, Unknown=0, NotChecked=0, Total=39800 [2021-12-06 22:10:37,913 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:40,387 INFO L93 Difference]: Finished difference Result 464 states and 466 transitions. [2021-12-06 22:10:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-12-06 22:10:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 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 263 [2021-12-06 22:10:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:40,387 INFO L225 Difference]: With dead ends: 464 [2021-12-06 22:10:40,388 INFO L226 Difference]: Without dead ends: 265 [2021-12-06 22:10:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15523 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=15551, Invalid=54939, Unknown=0, NotChecked=0, Total=70490 [2021-12-06 22:10:40,390 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 11 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:40,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1130 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:10:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-06 22:10:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-12-06 22:10:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-12-06 22:10:40,441 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 263 [2021-12-06 22:10:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:40,441 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-12-06 22:10:40,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-12-06 22:10:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-06 22:10:40,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:40,442 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:40,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-12-06 22:10:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:40,643 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -614148372, now seen corresponding path program 128 times [2021-12-06 22:10:40,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579142008] [2021-12-06 22:10:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:40,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2080 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:41,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579142008] [2021-12-06 22:10:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579142008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941561081] [2021-12-06 22:10:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:10:41,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:41,742 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:41,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-12-06 22:10:41,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:10:41,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 22:10:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:42,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941561081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:42,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:42,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 71 [2021-12-06 22:10:42,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338264439] [2021-12-06 22:10:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 22:10:42,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 22:10:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 22:10:42,354 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:43,340 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2021-12-06 22:10:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-06 22:10:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 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 264 [2021-12-06 22:10:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:43,341 INFO L225 Difference]: With dead ends: 276 [2021-12-06 22:10:43,341 INFO L226 Difference]: Without dead ends: 274 [2021-12-06 22:10:43,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6976, Invalid=11930, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 22:10:43,342 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 204 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:43,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 36 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:10:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-06 22:10:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2021-12-06 22:10:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2021-12-06 22:10:43,393 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 264 [2021-12-06 22:10:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:43,394 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2021-12-06 22:10:43,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2021-12-06 22:10:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-06 22:10:43,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:43,395 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:43,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-12-06 22:10:43,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-12-06 22:10:43,596 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 471350989, now seen corresponding path program 129 times [2021-12-06 22:10:43,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:43,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265248078] [2021-12-06 22:10:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:43,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6177 proven. 2338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:46,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265248078] [2021-12-06 22:10:46,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265248078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480158998] [2021-12-06 22:10:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:10:46,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:46,489 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:46,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-12-06 22:10:46,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-12-06 22:10:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:46,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-06 22:10:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:50,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480158998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:51,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 203 [2021-12-06 22:10:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993314484] [2021-12-06 22:10:51,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:51,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-06 22:10:51,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-06 22:10:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9184, Invalid=31822, Unknown=0, NotChecked=0, Total=41006 [2021-12-06 22:10:51,161 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:53,524 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2021-12-06 22:10:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-06 22:10:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 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 267 [2021-12-06 22:10:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:53,525 INFO L225 Difference]: With dead ends: 471 [2021-12-06 22:10:53,525 INFO L226 Difference]: Without dead ends: 269 [2021-12-06 22:10:53,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15993 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=16021, Invalid=56609, Unknown=0, NotChecked=0, Total=72630 [2021-12-06 22:10:53,527 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 11 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:53,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 848 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:10:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-06 22:10:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-06 22:10:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-12-06 22:10:53,581 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 267 [2021-12-06 22:10:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:53,581 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-12-06 22:10:53,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-12-06 22:10:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-06 22:10:53,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:53,582 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:53,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-12-06 22:10:53,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:53,783 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 523935624, now seen corresponding path program 130 times [2021-12-06 22:10:53,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500989806] [2021-12-06 22:10:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:53,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2145 proven. 6436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:54,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:54,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500989806] [2021-12-06 22:10:54,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500989806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:54,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961575355] [2021-12-06 22:10:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:10:54,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:54,838 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:54,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-12-06 22:10:54,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:10:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 22:10:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:55,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961575355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:55,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 72 [2021-12-06 22:10:55,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941094970] [2021-12-06 22:10:55,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:55,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 22:10:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 22:10:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 22:10:55,487 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:56,473 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2021-12-06 22:10:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-06 22:10:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 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 268 [2021-12-06 22:10:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:56,474 INFO L225 Difference]: With dead ends: 280 [2021-12-06 22:10:56,474 INFO L226 Difference]: Without dead ends: 278 [2021-12-06 22:10:56,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 597 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=7182, Invalid=12278, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 22:10:56,475 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 288 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:56,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 29 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:10:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-06 22:10:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 272. [2021-12-06 22:10:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2021-12-06 22:10:56,533 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 268 [2021-12-06 22:10:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2021-12-06 22:10:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2021-12-06 22:10:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-06 22:10:56,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:56,535 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:56,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-12-06 22:10:56,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:56,735 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 659841201, now seen corresponding path program 131 times [2021-12-06 22:10:56,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:56,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934971120] [2021-12-06 22:10:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:56,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6371 proven. 2407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:59,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:59,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934971120] [2021-12-06 22:10:59,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934971120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:59,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072117323] [2021-12-06 22:10:59,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:10:59,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:59,726 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:59,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-12-06 22:11:00,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-12-06 22:11:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-06 22:11:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:04,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:04,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072117323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:04,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:04,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137, 137] total 206 [2021-12-06 22:11:04,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502250496] [2021-12-06 22:11:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:04,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2021-12-06 22:11:04,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2021-12-06 22:11:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=32773, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 22:11:04,404 INFO L87 Difference]: Start difference. First operand 272 states and 273 transitions. Second operand has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:06,786 INFO L93 Difference]: Finished difference Result 478 states and 480 transitions. [2021-12-06 22:11:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-06 22:11:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 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 271 [2021-12-06 22:11:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:06,787 INFO L225 Difference]: With dead ends: 478 [2021-12-06 22:11:06,787 INFO L226 Difference]: Without dead ends: 273 [2021-12-06 22:11:06,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16470 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=16498, Invalid=58304, Unknown=0, NotChecked=0, Total=74802 [2021-12-06 22:11:06,789 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:06,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 982 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:11:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-06 22:11:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-12-06 22:11:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2021-12-06 22:11:06,843 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 271 [2021-12-06 22:11:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:06,843 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2021-12-06 22:11:06,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2021-12-06 22:11:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-06 22:11:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:06,844 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:06,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-12-06 22:11:07,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-12-06 22:11:07,046 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 479325164, now seen corresponding path program 132 times [2021-12-06 22:11:07,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156003215] [2021-12-06 22:11:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:07,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2211 proven. 6634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:08,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156003215] [2021-12-06 22:11:08,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156003215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231543970] [2021-12-06 22:11:08,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:11:08,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:08,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:08,169 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:08,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-12-06 22:11:08,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-12-06 22:11:08,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-06 22:11:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231543970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:08,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:08,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 73 [2021-12-06 22:11:08,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144436803] [2021-12-06 22:11:08,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:08,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 22:11:08,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:08,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 22:11:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 22:11:08,938 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:09,896 INFO L93 Difference]: Finished difference Result 284 states and 285 transitions. [2021-12-06 22:11:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 22:11:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 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 272 [2021-12-06 22:11:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:09,897 INFO L225 Difference]: With dead ends: 284 [2021-12-06 22:11:09,897 INFO L226 Difference]: Without dead ends: 282 [2021-12-06 22:11:09,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 606 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=7391, Invalid=12631, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 22:11:09,898 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:09,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 33 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:11:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-06 22:11:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 276. [2021-12-06 22:11:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2021-12-06 22:11:09,955 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 272 [2021-12-06 22:11:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2021-12-06 22:11:09,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2021-12-06 22:11:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-06 22:11:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:09,957 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:09,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-12-06 22:11:10,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-12-06 22:11:10,157 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1185478195, now seen corresponding path program 133 times [2021-12-06 22:11:10,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:10,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531426944] [2021-12-06 22:11:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:10,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6568 proven. 2477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:13,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531426944] [2021-12-06 22:11:13,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531426944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982275613] [2021-12-06 22:11:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:11:13,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:13,226 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-12-06 22:11:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-06 22:11:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:17,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982275613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:17,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:17,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 209 [2021-12-06 22:11:17,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139747092] [2021-12-06 22:11:17,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:17,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2021-12-06 22:11:17,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2021-12-06 22:11:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9734, Invalid=33738, Unknown=0, NotChecked=0, Total=43472 [2021-12-06 22:11:17,761 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 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) [2021-12-06 22:11:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:20,126 INFO L93 Difference]: Finished difference Result 485 states and 487 transitions. [2021-12-06 22:11:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-06 22:11:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 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) Word has length 275 [2021-12-06 22:11:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:20,126 INFO L225 Difference]: With dead ends: 485 [2021-12-06 22:11:20,126 INFO L226 Difference]: Without dead ends: 277 [2021-12-06 22:11:20,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16954 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=16982, Invalid=60024, Unknown=0, NotChecked=0, Total=77006 [2021-12-06 22:11:20,129 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 11 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:20,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 768 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:11:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-06 22:11:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-12-06 22:11:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-12-06 22:11:20,185 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 275 [2021-12-06 22:11:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:20,185 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-12-06 22:11:20,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 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) [2021-12-06 22:11:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-12-06 22:11:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-06 22:11:20,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:20,186 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:20,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-12-06 22:11:20,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-12-06 22:11:20,387 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1914077064, now seen corresponding path program 134 times [2021-12-06 22:11:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738068972] [2021-12-06 22:11:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:20,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2278 proven. 6835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:21,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738068972] [2021-12-06 22:11:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738068972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724005040] [2021-12-06 22:11:21,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:11:21,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:21,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:21,474 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:21,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-12-06 22:11:21,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:11:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 139 conjunts are in the unsatisfiable core [2021-12-06 22:11:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:21,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724005040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:22,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 74 [2021-12-06 22:11:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915136082] [2021-12-06 22:11:22,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 22:11:22,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 22:11:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:11:22,124 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:23,183 INFO L93 Difference]: Finished difference Result 288 states and 289 transitions. [2021-12-06 22:11:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 22:11:23,183 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 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 276 [2021-12-06 22:11:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:23,184 INFO L225 Difference]: With dead ends: 288 [2021-12-06 22:11:23,184 INFO L226 Difference]: Without dead ends: 286 [2021-12-06 22:11:23,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5166 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=7603, Invalid=12989, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 22:11:23,185 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 284 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:23,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 40 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:11:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-06 22:11:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2021-12-06 22:11:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.007168458781362) internal successors, (281), 279 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2021-12-06 22:11:23,246 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 276 [2021-12-06 22:11:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:23,246 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2021-12-06 22:11:23,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2021-12-06 22:11:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-06 22:11:23,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:23,247 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:23,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-12-06 22:11:23,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-12-06 22:11:23,448 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2006155087, now seen corresponding path program 135 times [2021-12-06 22:11:23,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:23,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721551167] [2021-12-06 22:11:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:23,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6768 proven. 2548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:26,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721551167] [2021-12-06 22:11:26,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721551167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488786357] [2021-12-06 22:11:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:11:26,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:26,619 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:26,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-12-06 22:11:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-12-06 22:11:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 22:11:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:31,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488786357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:31,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:31,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141, 141] total 212 [2021-12-06 22:11:31,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108061] [2021-12-06 22:11:31,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:31,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2021-12-06 22:11:31,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2021-12-06 22:11:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10015, Invalid=34717, Unknown=0, NotChecked=0, Total=44732 [2021-12-06 22:11:31,563 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:34,071 INFO L93 Difference]: Finished difference Result 492 states and 494 transitions. [2021-12-06 22:11:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 22:11:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 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 279 [2021-12-06 22:11:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:34,072 INFO L225 Difference]: With dead ends: 492 [2021-12-06 22:11:34,072 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 22:11:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17445 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=17473, Invalid=61769, Unknown=0, NotChecked=0, Total=79242 [2021-12-06 22:11:34,075 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 11 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:34,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1005 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:11:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 22:11:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-12-06 22:11:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2021-12-06 22:11:34,132 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 279 [2021-12-06 22:11:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:34,132 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2021-12-06 22:11:34,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2021-12-06 22:11:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-06 22:11:34,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:34,133 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:34,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-12-06 22:11:34,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:34,334 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1152688364, now seen corresponding path program 136 times [2021-12-06 22:11:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:34,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209019600] [2021-12-06 22:11:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:34,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2346 proven. 7039 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:35,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209019600] [2021-12-06 22:11:35,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209019600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675980819] [2021-12-06 22:11:35,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:11:35,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:35,501 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:35,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-12-06 22:11:35,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:11:35,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-06 22:11:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:35,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:36,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675980819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:36,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:36,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 75 [2021-12-06 22:11:36,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019734667] [2021-12-06 22:11:36,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:36,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 22:11:36,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 22:11:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 22:11:36,213 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:37,261 INFO L93 Difference]: Finished difference Result 292 states and 293 transitions. [2021-12-06 22:11:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-06 22:11:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 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 280 [2021-12-06 22:11:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:37,261 INFO L225 Difference]: With dead ends: 292 [2021-12-06 22:11:37,262 INFO L226 Difference]: Without dead ends: 290 [2021-12-06 22:11:37,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5311 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=7818, Invalid=13352, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 22:11:37,263 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 225 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:37,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 38 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:11:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-06 22:11:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2021-12-06 22:11:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0070671378091873) internal successors, (285), 283 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 285 transitions. [2021-12-06 22:11:37,321 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 285 transitions. Word has length 280 [2021-12-06 22:11:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 285 transitions. [2021-12-06 22:11:37,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 285 transitions. [2021-12-06 22:11:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-06 22:11:37,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:37,322 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:37,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-12-06 22:11:37,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:37,523 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1480340685, now seen corresponding path program 137 times [2021-12-06 22:11:37,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94357655] [2021-12-06 22:11:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:37,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 6971 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:40,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94357655] [2021-12-06 22:11:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94357655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754444394] [2021-12-06 22:11:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:11:40,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:40,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:40,754 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-12-06 22:11:41,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2021-12-06 22:11:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-06 22:11:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:45,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754444394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:45,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:45,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143, 143] total 215 [2021-12-06 22:11:45,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483045358] [2021-12-06 22:11:45,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2021-12-06 22:11:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2021-12-06 22:11:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=35710, Unknown=0, NotChecked=0, Total=46010 [2021-12-06 22:11:45,441 INFO L87 Difference]: Start difference. First operand 284 states and 285 transitions. Second operand has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:47,848 INFO L93 Difference]: Finished difference Result 499 states and 501 transitions. [2021-12-06 22:11:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 22:11:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 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 283 [2021-12-06 22:11:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:47,849 INFO L225 Difference]: With dead ends: 499 [2021-12-06 22:11:47,849 INFO L226 Difference]: Without dead ends: 285 [2021-12-06 22:11:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17943 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=17971, Invalid=63539, Unknown=0, NotChecked=0, Total=81510 [2021-12-06 22:11:47,852 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 11 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:47,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 725 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:11:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-06 22:11:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-12-06 22:11:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-12-06 22:11:47,917 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 283 [2021-12-06 22:11:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:47,917 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-12-06 22:11:47,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-12-06 22:11:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-06 22:11:47,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:47,918 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:47,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-12-06 22:11:48,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-12-06 22:11:48,119 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1991491464, now seen corresponding path program 138 times [2021-12-06 22:11:48,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436814504] [2021-12-06 22:11:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:48,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2415 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:49,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:49,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436814504] [2021-12-06 22:11:49,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436814504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:49,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371455868] [2021-12-06 22:11:49,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:11:49,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:49,348 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:49,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-12-06 22:11:49,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2021-12-06 22:11:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-06 22:11:49,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:49,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:50,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371455868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:50,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:50,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 76 [2021-12-06 22:11:50,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905371110] [2021-12-06 22:11:50,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:50,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 22:11:50,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 22:11:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3064, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 22:11:50,153 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:51,265 INFO L93 Difference]: Finished difference Result 296 states and 297 transitions. [2021-12-06 22:11:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-06 22:11:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 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 284 [2021-12-06 22:11:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:51,266 INFO L225 Difference]: With dead ends: 296 [2021-12-06 22:11:51,266 INFO L226 Difference]: Without dead ends: 294 [2021-12-06 22:11:51,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 633 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=8036, Invalid=13720, Unknown=0, NotChecked=0, Total=21756 [2021-12-06 22:11:51,267 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 294 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:51,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:11:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-06 22:11:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2021-12-06 22:11:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2021-12-06 22:11:51,327 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 284 [2021-12-06 22:11:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:51,327 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2021-12-06 22:11:51,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2021-12-06 22:11:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-06 22:11:51,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:51,328 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:51,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-12-06 22:11:51,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:51,529 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2143764657, now seen corresponding path program 139 times [2021-12-06 22:11:51,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:51,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563794171] [2021-12-06 22:11:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:51,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7177 proven. 2693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:54,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:54,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563794171] [2021-12-06 22:11:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563794171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:11:54,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53477516] [2021-12-06 22:11:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:11:54,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:54,825 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-12-06 22:11:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 22:11:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:59,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53477516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:59,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:11:59,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145, 145] total 218 [2021-12-06 22:11:59,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011442306] [2021-12-06 22:11:59,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:59,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2021-12-06 22:11:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2021-12-06 22:11:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10589, Invalid=36717, Unknown=0, NotChecked=0, Total=47306 [2021-12-06 22:11:59,758 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:02,446 INFO L93 Difference]: Finished difference Result 506 states and 508 transitions. [2021-12-06 22:12:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-06 22:12:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 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 287 [2021-12-06 22:12:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:02,447 INFO L225 Difference]: With dead ends: 506 [2021-12-06 22:12:02,447 INFO L226 Difference]: Without dead ends: 289 [2021-12-06 22:12:02,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18448 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=18476, Invalid=65334, Unknown=0, NotChecked=0, Total=83810 [2021-12-06 22:12:02,450 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 11 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:02,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 973 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:12:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-06 22:12:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-12-06 22:12:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-12-06 22:12:02,515 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 287 [2021-12-06 22:12:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:02,516 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-12-06 22:12:02,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-12-06 22:12:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-06 22:12:02,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:02,517 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:02,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-12-06 22:12:02,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:02,717 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash 766834156, now seen corresponding path program 140 times [2021-12-06 22:12:02,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:02,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636899772] [2021-12-06 22:12:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:02,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2485 proven. 7456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:03,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636899772] [2021-12-06 22:12:03,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636899772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360557954] [2021-12-06 22:12:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:12:03,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:03,984 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:03,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-12-06 22:12:04,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:12:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-06 22:12:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:04,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360557954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:04,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:04,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 77 [2021-12-06 22:12:04,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523269561] [2021-12-06 22:12:04,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:04,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 22:12:04,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:04,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 22:12:04,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3143, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:12:04,632 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:05,742 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2021-12-06 22:12:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-06 22:12:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 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 288 [2021-12-06 22:12:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:05,743 INFO L225 Difference]: With dead ends: 300 [2021-12-06 22:12:05,743 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 22:12:05,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 642 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5607 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=8257, Invalid=14093, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 22:12:05,744 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 231 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:05,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 40 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:12:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 22:12:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 292. [2021-12-06 22:12:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.006872852233677) internal successors, (293), 291 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2021-12-06 22:12:05,805 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 288 [2021-12-06 22:12:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2021-12-06 22:12:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2021-12-06 22:12:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-06 22:12:05,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:05,806 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:05,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-12-06 22:12:06,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:06,007 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -169885747, now seen corresponding path program 141 times [2021-12-06 22:12:06,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:06,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961292766] [2021-12-06 22:12:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:06,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7386 proven. 2767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:09,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961292766] [2021-12-06 22:12:09,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961292766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664708736] [2021-12-06 22:12:09,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:12:09,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:09,437 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:09,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-12-06 22:12:09,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2021-12-06 22:12:09,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 22:12:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:14,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664708736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:14,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:14,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147, 147] total 221 [2021-12-06 22:12:14,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419674003] [2021-12-06 22:12:14,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:14,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2021-12-06 22:12:14,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2021-12-06 22:12:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10882, Invalid=37738, Unknown=0, NotChecked=0, Total=48620 [2021-12-06 22:12:14,637 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:17,471 INFO L93 Difference]: Finished difference Result 513 states and 515 transitions. [2021-12-06 22:12:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-06 22:12:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 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 291 [2021-12-06 22:12:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:17,472 INFO L225 Difference]: With dead ends: 513 [2021-12-06 22:12:17,472 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 22:12:17,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18960 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=18988, Invalid=67154, Unknown=0, NotChecked=0, Total=86142 [2021-12-06 22:12:17,475 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 11 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:17,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 731 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:12:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 22:12:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-12-06 22:12:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2021-12-06 22:12:17,537 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 291 [2021-12-06 22:12:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:17,537 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2021-12-06 22:12:17,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2021-12-06 22:12:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-06 22:12:17,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:17,538 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:17,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-12-06 22:12:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:17,739 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -550871160, now seen corresponding path program 142 times [2021-12-06 22:12:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494675425] [2021-12-06 22:12:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:17,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2556 proven. 7669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:18,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494675425] [2021-12-06 22:12:18,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494675425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491012361] [2021-12-06 22:12:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:12:18,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:18,938 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:18,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-12-06 22:12:19,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:12:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 147 conjunts are in the unsatisfiable core [2021-12-06 22:12:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491012361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:19,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:19,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 78 [2021-12-06 22:12:19,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395912976] [2021-12-06 22:12:19,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:19,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 22:12:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 22:12:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3223, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:12:19,640 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:20,728 INFO L93 Difference]: Finished difference Result 304 states and 305 transitions. [2021-12-06 22:12:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-06 22:12:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 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 292 [2021-12-06 22:12:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:20,729 INFO L225 Difference]: With dead ends: 304 [2021-12-06 22:12:20,729 INFO L226 Difference]: Without dead ends: 302 [2021-12-06 22:12:20,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 651 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=8481, Invalid=14471, Unknown=0, NotChecked=0, Total=22952 [2021-12-06 22:12:20,730 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 159 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:20,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 35 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:12:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-06 22:12:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2021-12-06 22:12:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.006779661016949) internal successors, (297), 295 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 297 transitions. [2021-12-06 22:12:20,798 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 297 transitions. Word has length 292 [2021-12-06 22:12:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:20,798 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 297 transitions. [2021-12-06 22:12:20,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 297 transitions. [2021-12-06 22:12:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-06 22:12:20,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:20,799 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:20,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-12-06 22:12:21,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:21,000 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash 72130737, now seen corresponding path program 143 times [2021-12-06 22:12:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972246454] [2021-12-06 22:12:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:21,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7598 proven. 2842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:24,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972246454] [2021-12-06 22:12:24,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972246454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139744685] [2021-12-06 22:12:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:12:24,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:24,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:24,504 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:24,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-12-06 22:12:24,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-12-06 22:12:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-06 22:12:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:29,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139744685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:29,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:29,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149, 149] total 224 [2021-12-06 22:12:29,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567591689] [2021-12-06 22:12:29,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2021-12-06 22:12:29,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2021-12-06 22:12:29,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11179, Invalid=38773, Unknown=0, NotChecked=0, Total=49952 [2021-12-06 22:12:29,661 INFO L87 Difference]: Start difference. First operand 296 states and 297 transitions. Second operand has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:32,390 INFO L93 Difference]: Finished difference Result 520 states and 522 transitions. [2021-12-06 22:12:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-06 22:12:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 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 295 [2021-12-06 22:12:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:32,391 INFO L225 Difference]: With dead ends: 520 [2021-12-06 22:12:32,391 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 22:12:32,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19479 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=19507, Invalid=68999, Unknown=0, NotChecked=0, Total=88506 [2021-12-06 22:12:32,394 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:32,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 960 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:12:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 22:12:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-12-06 22:12:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2021-12-06 22:12:32,464 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 295 [2021-12-06 22:12:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:32,464 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2021-12-06 22:12:32,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2021-12-06 22:12:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-06 22:12:32,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:32,465 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:32,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-12-06 22:12:32,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:32,666 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash 58387180, now seen corresponding path program 144 times [2021-12-06 22:12:32,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:32,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621612651] [2021-12-06 22:12:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:32,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2628 proven. 7885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:33,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:33,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621612651] [2021-12-06 22:12:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621612651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:33,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766882261] [2021-12-06 22:12:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:12:33,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:33,942 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:33,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-12-06 22:12:34,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-12-06 22:12:34,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:34,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-06 22:12:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:34,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:34,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766882261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:34,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:34,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 79 [2021-12-06 22:12:34,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440040967] [2021-12-06 22:12:34,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 22:12:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 22:12:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3304, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 22:12:34,827 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:35,985 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2021-12-06 22:12:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-12-06 22:12:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 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 296 [2021-12-06 22:12:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:35,986 INFO L225 Difference]: With dead ends: 308 [2021-12-06 22:12:35,986 INFO L226 Difference]: Without dead ends: 306 [2021-12-06 22:12:35,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 660 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5911 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=8708, Invalid=14854, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 22:12:35,987 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 231 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:35,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 41 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:12:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-06 22:12:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 300. [2021-12-06 22:12:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.0066889632107023) internal successors, (301), 299 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2021-12-06 22:12:36,057 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 296 [2021-12-06 22:12:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:36,058 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2021-12-06 22:12:36,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2021-12-06 22:12:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-06 22:12:36,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:36,059 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:36,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-12-06 22:12:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-12-06 22:12:36,259 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -44455219, now seen corresponding path program 145 times [2021-12-06 22:12:36,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:36,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124365317] [2021-12-06 22:12:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:36,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 7813 proven. 2918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:39,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124365317] [2021-12-06 22:12:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124365317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583244827] [2021-12-06 22:12:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:12:39,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:39,896 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:39,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-12-06 22:12:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:40,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 150 conjunts are in the unsatisfiable core [2021-12-06 22:12:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:44,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:45,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583244827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:45,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:45,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 227 [2021-12-06 22:12:45,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724585597] [2021-12-06 22:12:45,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:45,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 227 states [2021-12-06 22:12:45,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2021-12-06 22:12:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11480, Invalid=39822, Unknown=0, NotChecked=0, Total=51302 [2021-12-06 22:12:45,126 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:48,101 INFO L93 Difference]: Finished difference Result 527 states and 529 transitions. [2021-12-06 22:12:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-06 22:12:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 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 299 [2021-12-06 22:12:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:48,102 INFO L225 Difference]: With dead ends: 527 [2021-12-06 22:12:48,102 INFO L226 Difference]: Without dead ends: 301 [2021-12-06 22:12:48,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20005 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=20033, Invalid=70869, Unknown=0, NotChecked=0, Total=90902 [2021-12-06 22:12:48,105 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:48,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1181 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:12:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-06 22:12:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-12-06 22:12:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0066666666666666) internal successors, (302), 300 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2021-12-06 22:12:48,177 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 299 [2021-12-06 22:12:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:48,177 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2021-12-06 22:12:48,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2021-12-06 22:12:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-06 22:12:48,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:48,178 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:48,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-12-06 22:12:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-12-06 22:12:48,379 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -879599736, now seen corresponding path program 146 times [2021-12-06 22:12:48,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553852622] [2021-12-06 22:12:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:48,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2701 proven. 8104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:49,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553852622] [2021-12-06 22:12:49,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553852622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118640084] [2021-12-06 22:12:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:12:49,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:49,732 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:49,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-12-06 22:12:49,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:12:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 22:12:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118640084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:12:50,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:12:50,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 80 [2021-12-06 22:12:50,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734407987] [2021-12-06 22:12:50,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:12:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 22:12:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 22:12:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3386, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 22:12:50,388 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:12:51,681 INFO L93 Difference]: Finished difference Result 312 states and 313 transitions. [2021-12-06 22:12:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-06 22:12:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 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 300 [2021-12-06 22:12:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:12:51,682 INFO L225 Difference]: With dead ends: 312 [2021-12-06 22:12:51,682 INFO L226 Difference]: Without dead ends: 310 [2021-12-06 22:12:51,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 669 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8938, Invalid=15242, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 22:12:51,683 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 314 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:12:51,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 28 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:12:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-06 22:12:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2021-12-06 22:12:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0066006600660067) internal successors, (305), 303 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2021-12-06 22:12:51,749 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 300 [2021-12-06 22:12:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:12:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2021-12-06 22:12:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2021-12-06 22:12:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-06 22:12:51,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:12:51,750 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:51,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-12-06 22:12:51,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-12-06 22:12:51,952 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:12:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -555441999, now seen corresponding path program 147 times [2021-12-06 22:12:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:51,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806708252] [2021-12-06 22:12:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:51,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8031 proven. 2995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:55,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806708252] [2021-12-06 22:12:55,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806708252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797646033] [2021-12-06 22:12:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:12:55,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:55,611 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-12-06 22:12:55,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2021-12-06 22:12:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-06 22:12:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:01,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:01,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797646033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:01,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:01,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153, 153] total 230 [2021-12-06 22:13:01,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654744605] [2021-12-06 22:13:01,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:01,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2021-12-06 22:13:01,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2021-12-06 22:13:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11785, Invalid=40885, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 22:13:01,573 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:04,650 INFO L93 Difference]: Finished difference Result 534 states and 536 transitions. [2021-12-06 22:13:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-12-06 22:13:04,650 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 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 303 [2021-12-06 22:13:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:04,651 INFO L225 Difference]: With dead ends: 534 [2021-12-06 22:13:04,651 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 22:13:04,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20538 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=20566, Invalid=72764, Unknown=0, NotChecked=0, Total=93330 [2021-12-06 22:13:04,654 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 11 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:04,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1162 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:13:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 22:13:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-12-06 22:13:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2021-12-06 22:13:04,728 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 303 [2021-12-06 22:13:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:04,729 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2021-12-06 22:13:04,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2021-12-06 22:13:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-06 22:13:04,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:04,730 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:04,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-12-06 22:13:04,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-12-06 22:13:04,931 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1007779860, now seen corresponding path program 148 times [2021-12-06 22:13:04,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:04,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924766568] [2021-12-06 22:13:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:04,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2775 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:06,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924766568] [2021-12-06 22:13:06,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924766568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169570616] [2021-12-06 22:13:06,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:13:06,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:06,271 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:06,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-12-06 22:13:06,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:13:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-06 22:13:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:06,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169570616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:06,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:06,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 81 [2021-12-06 22:13:06,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920879498] [2021-12-06 22:13:06,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:06,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 22:13:06,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 22:13:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3469, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 22:13:06,966 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:08,128 INFO L93 Difference]: Finished difference Result 316 states and 317 transitions. [2021-12-06 22:13:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-12-06 22:13:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-12-06 22:13:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:08,129 INFO L225 Difference]: With dead ends: 316 [2021-12-06 22:13:08,129 INFO L226 Difference]: Without dead ends: 314 [2021-12-06 22:13:08,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 678 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6223 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9171, Invalid=15635, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:13:08,130 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:08,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 38 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:13:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-06 22:13:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 308. [2021-12-06 22:13:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.006514657980456) internal successors, (309), 307 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 309 transitions. [2021-12-06 22:13:08,205 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 309 transitions. Word has length 304 [2021-12-06 22:13:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:08,205 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 309 transitions. [2021-12-06 22:13:08,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 309 transitions. [2021-12-06 22:13:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-06 22:13:08,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:08,206 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:08,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-12-06 22:13:08,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-12-06 22:13:08,407 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -943589939, now seen corresponding path program 149 times [2021-12-06 22:13:08,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989678801] [2021-12-06 22:13:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:08,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8252 proven. 3073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:12,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989678801] [2021-12-06 22:13:12,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989678801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903570515] [2021-12-06 22:13:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:13:12,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:12,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:12,343 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:12,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-12-06 22:13:12,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-12-06 22:13:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-06 22:13:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:17,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:18,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903570515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:18,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:18,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 233 [2021-12-06 22:13:18,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124991411] [2021-12-06 22:13:18,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 233 states [2021-12-06 22:13:18,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2021-12-06 22:13:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12094, Invalid=41962, Unknown=0, NotChecked=0, Total=54056 [2021-12-06 22:13:18,220 INFO L87 Difference]: Start difference. First operand 308 states and 309 transitions. Second operand has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:21,311 INFO L93 Difference]: Finished difference Result 541 states and 543 transitions. [2021-12-06 22:13:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-06 22:13:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 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 307 [2021-12-06 22:13:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:21,311 INFO L225 Difference]: With dead ends: 541 [2021-12-06 22:13:21,311 INFO L226 Difference]: Without dead ends: 309 [2021-12-06 22:13:21,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21078 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21106, Invalid=74684, Unknown=0, NotChecked=0, Total=95790 [2021-12-06 22:13:21,315 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 11 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:21,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1182 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:13:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-06 22:13:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-12-06 22:13:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2021-12-06 22:13:21,390 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 307 [2021-12-06 22:13:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:21,390 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2021-12-06 22:13:21,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2021-12-06 22:13:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-06 22:13:21,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:21,391 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:21,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-12-06 22:13:21,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-12-06 22:13:21,592 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1241759624, now seen corresponding path program 150 times [2021-12-06 22:13:21,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:21,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668524808] [2021-12-06 22:13:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:21,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2850 proven. 8551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:22,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:22,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668524808] [2021-12-06 22:13:22,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668524808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:22,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953649660] [2021-12-06 22:13:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:13:22,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:22,990 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:22,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-12-06 22:13:23,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2021-12-06 22:13:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-06 22:13:23,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:23,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953649660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:23,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 82 [2021-12-06 22:13:23,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892700825] [2021-12-06 22:13:23,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:23,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 22:13:23,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 22:13:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3553, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 22:13:23,990 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:25,242 INFO L93 Difference]: Finished difference Result 320 states and 321 transitions. [2021-12-06 22:13:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-06 22:13:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 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 308 [2021-12-06 22:13:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:25,243 INFO L225 Difference]: With dead ends: 320 [2021-12-06 22:13:25,243 INFO L226 Difference]: Without dead ends: 318 [2021-12-06 22:13:25,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 687 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9407, Invalid=16033, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 22:13:25,244 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:25,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 38 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:13:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-06 22:13:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2021-12-06 22:13:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0064308681672025) internal successors, (313), 311 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2021-12-06 22:13:25,321 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 308 [2021-12-06 22:13:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2021-12-06 22:13:25,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2021-12-06 22:13:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-06 22:13:25,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:25,322 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:25,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-12-06 22:13:25,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:25,523 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 712458417, now seen corresponding path program 151 times [2021-12-06 22:13:25,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903632748] [2021-12-06 22:13:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:25,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8476 proven. 3152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:29,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903632748] [2021-12-06 22:13:29,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903632748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060591728] [2021-12-06 22:13:29,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:13:29,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:29,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:29,438 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:29,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-12-06 22:13:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 156 conjunts are in the unsatisfiable core [2021-12-06 22:13:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:35,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060591728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:35,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:35,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157, 157] total 236 [2021-12-06 22:13:35,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879183312] [2021-12-06 22:13:35,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:35,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2021-12-06 22:13:35,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2021-12-06 22:13:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12407, Invalid=43053, Unknown=0, NotChecked=0, Total=55460 [2021-12-06 22:13:35,011 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:38,113 INFO L93 Difference]: Finished difference Result 548 states and 550 transitions. [2021-12-06 22:13:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-12-06 22:13:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 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 311 [2021-12-06 22:13:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:38,113 INFO L225 Difference]: With dead ends: 548 [2021-12-06 22:13:38,113 INFO L226 Difference]: Without dead ends: 313 [2021-12-06 22:13:38,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21625 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=21653, Invalid=76629, Unknown=0, NotChecked=0, Total=98282 [2021-12-06 22:13:38,117 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 11 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:38,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 935 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:13:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-06 22:13:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-12-06 22:13:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2021-12-06 22:13:38,194 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 311 [2021-12-06 22:13:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:38,194 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2021-12-06 22:13:38,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2021-12-06 22:13:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-06 22:13:38,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:38,195 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:38,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-12-06 22:13:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:38,396 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1091062548, now seen corresponding path program 152 times [2021-12-06 22:13:38,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663461644] [2021-12-06 22:13:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:38,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 2926 proven. 8779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:39,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663461644] [2021-12-06 22:13:39,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663461644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530226753] [2021-12-06 22:13:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:13:39,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:39,818 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:39,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-12-06 22:13:39,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:13:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 22:13:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:40,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530226753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:40,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:40,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 83 [2021-12-06 22:13:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492093347] [2021-12-06 22:13:40,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 22:13:40,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 22:13:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3638, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:13:40,521 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:41,738 INFO L93 Difference]: Finished difference Result 324 states and 325 transitions. [2021-12-06 22:13:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-12-06 22:13:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 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 312 [2021-12-06 22:13:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:41,739 INFO L225 Difference]: With dead ends: 324 [2021-12-06 22:13:41,739 INFO L226 Difference]: Without dead ends: 322 [2021-12-06 22:13:41,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 696 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6543 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9646, Invalid=16436, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 22:13:41,740 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:41,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 29 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:13:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-06 22:13:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2021-12-06 22:13:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0063492063492063) internal successors, (317), 315 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2021-12-06 22:13:41,821 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 312 [2021-12-06 22:13:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:41,822 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2021-12-06 22:13:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2021-12-06 22:13:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-06 22:13:41,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:41,823 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:41,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-12-06 22:13:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:42,025 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 472948941, now seen corresponding path program 153 times [2021-12-06 22:13:42,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:42,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073391042] [2021-12-06 22:13:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:42,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8703 proven. 3232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:46,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073391042] [2021-12-06 22:13:46,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073391042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706010276] [2021-12-06 22:13:46,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:13:46,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:46,060 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:46,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-12-06 22:13:46,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2021-12-06 22:13:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-06 22:13:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8932 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:51,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8932 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:52,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706010276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:52,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:52,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159, 159] total 239 [2021-12-06 22:13:52,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027653762] [2021-12-06 22:13:52,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:52,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 239 states [2021-12-06 22:13:52,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2021-12-06 22:13:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12724, Invalid=44158, Unknown=0, NotChecked=0, Total=56882 [2021-12-06 22:13:52,294 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand has 239 states, 239 states have (on average 2.3179916317991633) internal successors, (554), 239 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:55,649 INFO L93 Difference]: Finished difference Result 555 states and 557 transitions. [2021-12-06 22:13:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-06 22:13:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 239 states, 239 states have (on average 2.3179916317991633) internal successors, (554), 239 states have internal predecessors, (554), 0 states have call successors, (0), 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 315 [2021-12-06 22:13:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:55,650 INFO L225 Difference]: With dead ends: 555 [2021-12-06 22:13:55,650 INFO L226 Difference]: Without dead ends: 317 [2021-12-06 22:13:55,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22179 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=22207, Invalid=78599, Unknown=0, NotChecked=0, Total=100806 [2021-12-06 22:13:55,654 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:55,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1093 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:13:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-06 22:13:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-12-06 22:13:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0063291139240507) internal successors, (318), 316 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2021-12-06 22:13:55,727 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 315 [2021-12-06 22:13:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:55,727 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2021-12-06 22:13:55,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 239 states, 239 states have (on average 2.3179916317991633) internal successors, (554), 239 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2021-12-06 22:13:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-06 22:13:55,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:55,728 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-12-06 22:13:55,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:55,929 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -694780024, now seen corresponding path program 154 times [2021-12-06 22:13:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:55,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551099816] [2021-12-06 22:13:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:55,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3003 proven. 9010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:57,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551099816] [2021-12-06 22:13:57,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551099816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271370170] [2021-12-06 22:13:57,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:13:57,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:57,459 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:57,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-12-06 22:13:57,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:13:57,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:57,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 159 conjunts are in the unsatisfiable core [2021-12-06 22:13:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3081 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:57,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3081 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271370170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:58,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:58,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 84 [2021-12-06 22:13:58,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836605624] [2021-12-06 22:13:58,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 22:13:58,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 22:13:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=3724, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 22:13:58,223 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:59,486 INFO L93 Difference]: Finished difference Result 328 states and 329 transitions. [2021-12-06 22:13:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-06 22:13:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2021-12-06 22:13:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:59,487 INFO L225 Difference]: With dead ends: 328 [2021-12-06 22:13:59,487 INFO L226 Difference]: Without dead ends: 326 [2021-12-06 22:13:59,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 705 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9888, Invalid=16844, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 22:13:59,489 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 167 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 59 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:13:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-06 22:13:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 320. [2021-12-06 22:13:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.006269592476489) internal successors, (321), 319 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 321 transitions. [2021-12-06 22:13:59,563 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 321 transitions. Word has length 316 [2021-12-06 22:13:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:59,563 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 321 transitions. [2021-12-06 22:13:59,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 321 transitions. [2021-12-06 22:13:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-06 22:13:59,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:59,564 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:59,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-12-06 22:13:59,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-12-06 22:13:59,765 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:13:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -739475279, now seen corresponding path program 155 times [2021-12-06 22:13:59,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:59,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368412518] [2021-12-06 22:13:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:59,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 8933 proven. 3313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:03,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368412518] [2021-12-06 22:14:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368412518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321556518] [2021-12-06 22:14:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:14:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:03,856 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:03,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-12-06 22:14:04,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2021-12-06 22:14:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-06 22:14:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 9165 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:09,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 9165 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:09,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321556518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:09,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:09,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161, 161] total 242 [2021-12-06 22:14:09,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885645848] [2021-12-06 22:14:09,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:09,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2021-12-06 22:14:09,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2021-12-06 22:14:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13045, Invalid=45277, Unknown=0, NotChecked=0, Total=58322 [2021-12-06 22:14:09,779 INFO L87 Difference]: Start difference. First operand 320 states and 321 transitions. Second operand has 242 states, 242 states have (on average 2.3181818181818183) internal successors, (561), 242 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:13,000 INFO L93 Difference]: Finished difference Result 562 states and 564 transitions. [2021-12-06 22:14:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-12-06 22:14:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 2.3181818181818183) internal successors, (561), 242 states have internal predecessors, (561), 0 states have call successors, (0), 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 319 [2021-12-06 22:14:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:13,001 INFO L225 Difference]: With dead ends: 562 [2021-12-06 22:14:13,001 INFO L226 Difference]: Without dead ends: 321 [2021-12-06 22:14:13,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22740 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=22768, Invalid=80594, Unknown=0, NotChecked=0, Total=103362 [2021-12-06 22:14:13,005 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 11 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:13,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1064 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:14:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-06 22:14:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2021-12-06 22:14:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.00625) internal successors, (322), 320 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2021-12-06 22:14:13,086 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 319 [2021-12-06 22:14:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:13,086 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2021-12-06 22:14:13,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 2.3181818181818183) internal successors, (561), 242 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2021-12-06 22:14:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-06 22:14:13,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:13,087 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:13,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-12-06 22:14:13,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-12-06 22:14:13,288 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 377391596, now seen corresponding path program 156 times [2021-12-06 22:14:13,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:13,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274515868] [2021-12-06 22:14:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:13,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3081 proven. 9244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:14,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274515868] [2021-12-06 22:14:14,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274515868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684492319] [2021-12-06 22:14:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:14:14,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:14,745 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:14,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-12-06 22:14:15,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-12-06 22:14:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 161 conjunts are in the unsatisfiable core [2021-12-06 22:14:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3160 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:15,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3160 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684492319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:15,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:15,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 85 [2021-12-06 22:14:15,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419312075] [2021-12-06 22:14:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:15,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 22:14:15,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:15,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 22:14:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=3811, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 22:14:15,660 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:16,918 INFO L93 Difference]: Finished difference Result 332 states and 333 transitions. [2021-12-06 22:14:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-12-06 22:14:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 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 320 [2021-12-06 22:14:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:16,919 INFO L225 Difference]: With dead ends: 332 [2021-12-06 22:14:16,919 INFO L226 Difference]: Without dead ends: 330 [2021-12-06 22:14:16,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 714 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6871 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=10133, Invalid=17257, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 22:14:16,921 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 256 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:16,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 35 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:14:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-06 22:14:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2021-12-06 22:14:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.0061919504643964) internal successors, (325), 323 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 325 transitions. [2021-12-06 22:14:17,003 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 325 transitions. Word has length 320 [2021-12-06 22:14:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:17,003 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 325 transitions. [2021-12-06 22:14:17,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 325 transitions. [2021-12-06 22:14:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-06 22:14:17,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:17,004 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:17,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-12-06 22:14:17,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-12-06 22:14:17,205 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1346524211, now seen corresponding path program 157 times [2021-12-06 22:14:17,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328356143] [2021-12-06 22:14:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:17,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9166 proven. 3395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:21,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328356143] [2021-12-06 22:14:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328356143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075636322] [2021-12-06 22:14:21,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:14:21,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:21,437 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:21,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-12-06 22:14:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-06 22:14:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9401 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:27,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9401 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:27,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075636322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:27,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:27,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 245 [2021-12-06 22:14:27,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885215715] [2021-12-06 22:14:27,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:27,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2021-12-06 22:14:27,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2021-12-06 22:14:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13370, Invalid=46410, Unknown=0, NotChecked=0, Total=59780 [2021-12-06 22:14:27,404 INFO L87 Difference]: Start difference. First operand 324 states and 325 transitions. Second operand has 245 states, 245 states have (on average 2.3183673469387753) internal successors, (568), 245 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:30,811 INFO L93 Difference]: Finished difference Result 569 states and 571 transitions. [2021-12-06 22:14:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-06 22:14:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 2.3183673469387753) internal successors, (568), 245 states have internal predecessors, (568), 0 states have call successors, (0), 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 323 [2021-12-06 22:14:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:30,812 INFO L225 Difference]: With dead ends: 569 [2021-12-06 22:14:30,812 INFO L226 Difference]: Without dead ends: 325 [2021-12-06 22:14:30,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23308 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=23336, Invalid=82614, Unknown=0, NotChecked=0, Total=105950 [2021-12-06 22:14:30,816 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 11 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:30,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1108 Invalid, 2230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:14:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-06 22:14:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-12-06 22:14:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0061728395061729) internal successors, (326), 324 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2021-12-06 22:14:30,899 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 323 [2021-12-06 22:14:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:30,899 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2021-12-06 22:14:30,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 2.3183673469387753) internal successors, (568), 245 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2021-12-06 22:14:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 22:14:30,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:30,900 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:30,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-12-06 22:14:31,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-12-06 22:14:31,101 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash -614293624, now seen corresponding path program 158 times [2021-12-06 22:14:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820523616] [2021-12-06 22:14:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:31,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3160 proven. 9481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:32,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820523616] [2021-12-06 22:14:32,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820523616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956755261] [2021-12-06 22:14:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:14:32,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:32,633 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-12-06 22:14:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:14:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-06 22:14:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3240 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3240 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:33,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956755261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:33,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:33,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 86 [2021-12-06 22:14:33,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546712166] [2021-12-06 22:14:33,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:33,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 22:14:33,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 22:14:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3411, Invalid=3899, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 22:14:33,359 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:34,666 INFO L93 Difference]: Finished difference Result 336 states and 337 transitions. [2021-12-06 22:14:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-06 22:14:34,666 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 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 324 [2021-12-06 22:14:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:34,666 INFO L225 Difference]: With dead ends: 336 [2021-12-06 22:14:34,667 INFO L226 Difference]: Without dead ends: 334 [2021-12-06 22:14:34,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 723 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10381, Invalid=17675, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 22:14:34,668 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 173 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:34,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 41 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:14:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-06 22:14:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 328. [2021-12-06 22:14:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0061162079510704) internal successors, (329), 327 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 329 transitions. [2021-12-06 22:14:34,745 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 329 transitions. Word has length 324 [2021-12-06 22:14:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:34,746 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 329 transitions. [2021-12-06 22:14:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 329 transitions. [2021-12-06 22:14:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-06 22:14:34,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:34,747 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-12-06 22:14:34,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:34,948 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 439115953, now seen corresponding path program 159 times [2021-12-06 22:14:34,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:34,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460302023] [2021-12-06 22:14:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:34,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9402 proven. 3478 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:39,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460302023] [2021-12-06 22:14:39,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460302023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455744822] [2021-12-06 22:14:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:14:39,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:39,289 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:39,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-12-06 22:14:39,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-12-06 22:14:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:39,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 164 conjunts are in the unsatisfiable core [2021-12-06 22:14:39,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9640 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:45,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9640 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455744822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:45,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:45,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165, 165] total 248 [2021-12-06 22:14:45,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893328980] [2021-12-06 22:14:45,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:45,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2021-12-06 22:14:45,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:45,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2021-12-06 22:14:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13699, Invalid=47557, Unknown=0, NotChecked=0, Total=61256 [2021-12-06 22:14:45,708 INFO L87 Difference]: Start difference. First operand 328 states and 329 transitions. Second operand has 248 states, 248 states have (on average 2.318548387096774) internal successors, (575), 248 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:49,221 INFO L93 Difference]: Finished difference Result 576 states and 578 transitions. [2021-12-06 22:14:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-12-06 22:14:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 2.318548387096774) internal successors, (575), 248 states have internal predecessors, (575), 0 states have call successors, (0), 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 327 [2021-12-06 22:14:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:49,221 INFO L225 Difference]: With dead ends: 576 [2021-12-06 22:14:49,222 INFO L226 Difference]: Without dead ends: 329 [2021-12-06 22:14:49,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23883 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=23911, Invalid=84659, Unknown=0, NotChecked=0, Total=108570 [2021-12-06 22:14:49,226 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 11 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:49,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1018 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:14:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-06 22:14:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-06 22:14:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 328 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 330 transitions. [2021-12-06 22:14:49,304 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 330 transitions. Word has length 327 [2021-12-06 22:14:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:49,305 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 330 transitions. [2021-12-06 22:14:49,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 2.318548387096774) internal successors, (575), 248 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 330 transitions. [2021-12-06 22:14:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 22:14:49,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:49,310 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:49,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-12-06 22:14:49,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-12-06 22:14:49,511 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1047199468, now seen corresponding path program 160 times [2021-12-06 22:14:49,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:49,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777818515] [2021-12-06 22:14:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:49,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3240 proven. 9721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:51,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777818515] [2021-12-06 22:14:51,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777818515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006648567] [2021-12-06 22:14:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:14:51,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:51,181 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:51,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-12-06 22:14:51,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:14:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-06 22:14:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3321 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:51,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3321 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:51,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006648567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:51,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:51,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 87 [2021-12-06 22:14:51,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059177755] [2021-12-06 22:14:51,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:51,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 22:14:51,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 22:14:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3494, Invalid=3988, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 22:14:51,990 INFO L87 Difference]: Start difference. First operand 329 states and 330 transitions. Second operand has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:53,309 INFO L93 Difference]: Finished difference Result 340 states and 341 transitions. [2021-12-06 22:14:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-06 22:14:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 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 328 [2021-12-06 22:14:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:53,310 INFO L225 Difference]: With dead ends: 340 [2021-12-06 22:14:53,310 INFO L226 Difference]: Without dead ends: 338 [2021-12-06 22:14:53,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 732 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=10632, Invalid=18098, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 22:14:53,311 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 257 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 35 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:14:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-06 22:14:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2021-12-06 22:14:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.0060422960725075) internal successors, (333), 331 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 333 transitions. [2021-12-06 22:14:53,395 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 333 transitions. Word has length 328 [2021-12-06 22:14:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:53,395 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 333 transitions. [2021-12-06 22:14:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 333 transitions. [2021-12-06 22:14:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-06 22:14:53,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:53,397 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:53,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-12-06 22:14:53,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:53,598 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1518266675, now seen corresponding path program 161 times [2021-12-06 22:14:53,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:53,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111521377] [2021-12-06 22:14:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:53,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9641 proven. 3562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:57,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111521377] [2021-12-06 22:14:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111521377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928282735] [2021-12-06 22:14:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:14:57,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:57,974 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:57,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-12-06 22:14:58,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2021-12-06 22:14:58,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 166 conjunts are in the unsatisfiable core [2021-12-06 22:14:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9882 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:04,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9882 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:04,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928282735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:04,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:04,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167, 167] total 251 [2021-12-06 22:15:04,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780968131] [2021-12-06 22:15:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2021-12-06 22:15:04,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2021-12-06 22:15:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14032, Invalid=48718, Unknown=0, NotChecked=0, Total=62750 [2021-12-06 22:15:04,520 INFO L87 Difference]: Start difference. First operand 332 states and 333 transitions. Second operand has 251 states, 251 states have (on average 2.318725099601594) internal successors, (582), 251 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:08,003 INFO L93 Difference]: Finished difference Result 583 states and 585 transitions. [2021-12-06 22:15:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-06 22:15:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 251 states have (on average 2.318725099601594) internal successors, (582), 251 states have internal predecessors, (582), 0 states have call successors, (0), 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 331 [2021-12-06 22:15:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:08,004 INFO L225 Difference]: With dead ends: 583 [2021-12-06 22:15:08,004 INFO L226 Difference]: Without dead ends: 333 [2021-12-06 22:15:08,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24465 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=24493, Invalid=86729, Unknown=0, NotChecked=0, Total=111222 [2021-12-06 22:15:08,008 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 11 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:08,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1008 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:15:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-06 22:15:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2021-12-06 22:15:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.0060240963855422) internal successors, (334), 332 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 334 transitions. [2021-12-06 22:15:08,088 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 334 transitions. Word has length 331 [2021-12-06 22:15:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:08,088 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 334 transitions. [2021-12-06 22:15:08,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 251 states have (on average 2.318725099601594) internal successors, (582), 251 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 334 transitions. [2021-12-06 22:15:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-12-06 22:15:08,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:08,090 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:08,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-12-06 22:15:08,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:08,291 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 813703048, now seen corresponding path program 162 times [2021-12-06 22:15:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:08,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867847749] [2021-12-06 22:15:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:08,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13285 backedges. 3321 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:09,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:09,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867847749] [2021-12-06 22:15:09,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867847749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:09,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791289427] [2021-12-06 22:15:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:15:09,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:09,969 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:09,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-12-06 22:15:10,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2021-12-06 22:15:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 167 conjunts are in the unsatisfiable core [2021-12-06 22:15:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13285 backedges. 3403 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13285 backedges. 3403 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:10,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791289427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:10,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:10,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 88 [2021-12-06 22:15:10,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872441715] [2021-12-06 22:15:10,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:10,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 22:15:10,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 22:15:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3578, Invalid=4078, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 22:15:10,997 INFO L87 Difference]: Start difference. First operand 333 states and 334 transitions. Second operand has 88 states, 88 states have (on average 3.8181818181818183) internal successors, (336), 88 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:12,442 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2021-12-06 22:15:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-06 22:15:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.8181818181818183) internal successors, (336), 88 states have internal predecessors, (336), 0 states have call successors, (0), 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 332 [2021-12-06 22:15:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:12,443 INFO L225 Difference]: With dead ends: 344 [2021-12-06 22:15:12,443 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 22:15:12,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 741 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7378 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=10886, Invalid=18526, Unknown=0, NotChecked=0, Total=29412 [2021-12-06 22:15:12,445 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 264 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:12,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 40 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:15:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 22:15:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2021-12-06 22:15:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.0059701492537314) internal successors, (337), 335 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2021-12-06 22:15:12,531 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 332 [2021-12-06 22:15:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:12,532 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2021-12-06 22:15:12,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.8181818181818183) internal successors, (336), 88 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2021-12-06 22:15:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-06 22:15:12,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:12,533 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:12,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-12-06 22:15:12,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:12,734 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash 236904625, now seen corresponding path program 163 times [2021-12-06 22:15:12,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:12,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798770242] [2021-12-06 22:15:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:12,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 9883 proven. 3647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:17,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798770242] [2021-12-06 22:15:17,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798770242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116250236] [2021-12-06 22:15:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:15:17,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:17,038 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-12-06 22:15:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 22:15:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 10127 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:23,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 10127 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:23,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116250236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:23,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:23,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169, 169] total 254 [2021-12-06 22:15:23,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141438373] [2021-12-06 22:15:23,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2021-12-06 22:15:23,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2021-12-06 22:15:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14369, Invalid=49893, Unknown=0, NotChecked=0, Total=64262 [2021-12-06 22:15:23,573 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand has 254 states, 254 states have (on average 2.3188976377952755) internal successors, (589), 254 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:27,538 INFO L93 Difference]: Finished difference Result 590 states and 592 transitions. [2021-12-06 22:15:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-06 22:15:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 2.3188976377952755) internal successors, (589), 254 states have internal predecessors, (589), 0 states have call successors, (0), 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 335 [2021-12-06 22:15:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:27,539 INFO L225 Difference]: With dead ends: 590 [2021-12-06 22:15:27,539 INFO L226 Difference]: Without dead ends: 337 [2021-12-06 22:15:27,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25054 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=25082, Invalid=88824, Unknown=0, NotChecked=0, Total=113906 [2021-12-06 22:15:27,544 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:27,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1555 Invalid, 3142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:15:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-06 22:15:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2021-12-06 22:15:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.005952380952381) internal successors, (338), 336 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 338 transitions. [2021-12-06 22:15:27,634 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 338 transitions. Word has length 335 [2021-12-06 22:15:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:27,634 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 338 transitions. [2021-12-06 22:15:27,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 2.3188976377952755) internal successors, (589), 254 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 338 transitions. [2021-12-06 22:15:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-06 22:15:27,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:27,635 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:27,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-12-06 22:15:27,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:27,836 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2091193324, now seen corresponding path program 164 times [2021-12-06 22:15:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998405426] [2021-12-06 22:15:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13613 backedges. 3403 proven. 10210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:29,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998405426] [2021-12-06 22:15:29,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998405426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168278706] [2021-12-06 22:15:29,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:15:29,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:29,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:29,503 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:29,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-12-06 22:15:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:15:29,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 169 conjunts are in the unsatisfiable core [2021-12-06 22:15:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13613 backedges. 3486 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13613 backedges. 3486 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:30,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168278706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:30,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:30,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 89 [2021-12-06 22:15:30,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095606962] [2021-12-06 22:15:30,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:30,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 22:15:30,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 22:15:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3663, Invalid=4169, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 22:15:30,249 INFO L87 Difference]: Start difference. First operand 337 states and 338 transitions. Second operand has 89 states, 89 states have (on average 3.8202247191011236) internal successors, (340), 89 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:31,643 INFO L93 Difference]: Finished difference Result 348 states and 349 transitions. [2021-12-06 22:15:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-12-06 22:15:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.8202247191011236) internal successors, (340), 89 states have internal predecessors, (340), 0 states have call successors, (0), 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 336 [2021-12-06 22:15:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:31,644 INFO L225 Difference]: With dead ends: 348 [2021-12-06 22:15:31,644 INFO L226 Difference]: Without dead ends: 346 [2021-12-06 22:15:31,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 750 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7551 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=11143, Invalid=18959, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 22:15:31,645 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 268 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:31,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 36 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:15:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-06 22:15:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 340. [2021-12-06 22:15:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.0058997050147493) internal successors, (341), 339 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2021-12-06 22:15:31,728 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 336 [2021-12-06 22:15:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2021-12-06 22:15:31,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.8202247191011236) internal successors, (340), 89 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2021-12-06 22:15:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-06 22:15:31,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:31,729 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:31,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-12-06 22:15:31,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:31,930 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 244507085, now seen corresponding path program 165 times [2021-12-06 22:15:31,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265805746] [2021-12-06 22:15:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:31,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 10128 proven. 3733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:36,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:36,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265805746] [2021-12-06 22:15:36,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265805746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:36,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073354785] [2021-12-06 22:15:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:15:36,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:36,460 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:36,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-12-06 22:15:36,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2021-12-06 22:15:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-06 22:15:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 10375 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:42,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 10375 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073354785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:43,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:43,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171, 171] total 257 [2021-12-06 22:15:43,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058243295] [2021-12-06 22:15:43,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2021-12-06 22:15:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2021-12-06 22:15:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14710, Invalid=51082, Unknown=0, NotChecked=0, Total=65792 [2021-12-06 22:15:43,085 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand has 257 states, 257 states have (on average 2.3190661478599224) internal successors, (596), 257 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:46,687 INFO L93 Difference]: Finished difference Result 597 states and 599 transitions. [2021-12-06 22:15:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-06 22:15:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.3190661478599224) internal successors, (596), 257 states have internal predecessors, (596), 0 states have call successors, (0), 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 339 [2021-12-06 22:15:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:46,688 INFO L225 Difference]: With dead ends: 597 [2021-12-06 22:15:46,688 INFO L226 Difference]: Without dead ends: 341 [2021-12-06 22:15:46,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25650 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=25678, Invalid=90944, Unknown=0, NotChecked=0, Total=116622 [2021-12-06 22:15:46,693 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 11 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:46,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1158 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:15:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-06 22:15:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-12-06 22:15:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0058823529411764) internal successors, (342), 340 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2021-12-06 22:15:46,783 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 339 [2021-12-06 22:15:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:46,783 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2021-12-06 22:15:46,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.3190661478599224) internal successors, (596), 257 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2021-12-06 22:15:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-06 22:15:46,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:46,784 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:46,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-12-06 22:15:46,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:46,985 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1677262968, now seen corresponding path program 166 times [2021-12-06 22:15:46,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:46,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501318803] [2021-12-06 22:15:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:46,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13945 backedges. 3486 proven. 10459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:48,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501318803] [2021-12-06 22:15:48,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501318803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860911841] [2021-12-06 22:15:48,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:15:48,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:48,636 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:48,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-12-06 22:15:48,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:15:48,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-06 22:15:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13945 backedges. 3570 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:49,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13945 backedges. 3570 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860911841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:49,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:49,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 90 [2021-12-06 22:15:49,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470766483] [2021-12-06 22:15:49,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:49,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 22:15:49,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 22:15:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3749, Invalid=4261, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 22:15:49,503 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand has 90 states, 90 states have (on average 3.8222222222222224) internal successors, (344), 90 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:50,897 INFO L93 Difference]: Finished difference Result 352 states and 353 transitions. [2021-12-06 22:15:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-12-06 22:15:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.8222222222222224) internal successors, (344), 90 states have internal predecessors, (344), 0 states have call successors, (0), 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 340 [2021-12-06 22:15:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:50,897 INFO L225 Difference]: With dead ends: 352 [2021-12-06 22:15:50,898 INFO L226 Difference]: Without dead ends: 350 [2021-12-06 22:15:50,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 759 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7726 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=11403, Invalid=19397, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 22:15:50,899 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 185 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:50,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 29 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:15:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-06 22:15:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 344. [2021-12-06 22:15:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0058309037900874) internal successors, (345), 343 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 345 transitions. [2021-12-06 22:15:50,991 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 345 transitions. Word has length 340 [2021-12-06 22:15:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:50,991 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 345 transitions. [2021-12-06 22:15:50,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.8222222222222224) internal successors, (344), 90 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 345 transitions. [2021-12-06 22:15:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-06 22:15:50,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:50,992 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:51,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-12-06 22:15:51,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-12-06 22:15:51,193 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash 313262257, now seen corresponding path program 167 times [2021-12-06 22:15:51,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:51,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756804010] [2021-12-06 22:15:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:51,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 10376 proven. 3820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:55,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756804010] [2021-12-06 22:15:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756804010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:55,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483914418] [2021-12-06 22:15:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:15:55,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:55,598 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:55,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-12-06 22:15:55,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-12-06 22:15:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-06 22:15:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 10626 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:02,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 10626 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483914418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:02,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:02,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [173, 173, 173] total 260 [2021-12-06 22:16:02,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134811256] [2021-12-06 22:16:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 260 states [2021-12-06 22:16:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 260 interpolants. [2021-12-06 22:16:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15055, Invalid=52285, Unknown=0, NotChecked=0, Total=67340 [2021-12-06 22:16:02,562 INFO L87 Difference]: Start difference. First operand 344 states and 345 transitions. Second operand has 260 states, 260 states have (on average 2.3192307692307694) internal successors, (603), 260 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:06,513 INFO L93 Difference]: Finished difference Result 604 states and 606 transitions. [2021-12-06 22:16:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-12-06 22:16:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 260 states, 260 states have (on average 2.3192307692307694) internal successors, (603), 260 states have internal predecessors, (603), 0 states have call successors, (0), 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 343 [2021-12-06 22:16:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:06,514 INFO L225 Difference]: With dead ends: 604 [2021-12-06 22:16:06,514 INFO L226 Difference]: Without dead ends: 345 [2021-12-06 22:16:06,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26253 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=26281, Invalid=93089, Unknown=0, NotChecked=0, Total=119370 [2021-12-06 22:16:06,519 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 11 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:06,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1407 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:16:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-06 22:16:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-12-06 22:16:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.005813953488372) internal successors, (346), 344 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 346 transitions. [2021-12-06 22:16:06,611 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 346 transitions. Word has length 343 [2021-12-06 22:16:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 346 transitions. [2021-12-06 22:16:06,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 260 states, 260 states have (on average 2.3192307692307694) internal successors, (603), 260 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 346 transitions. [2021-12-06 22:16:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-06 22:16:06,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:06,612 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:06,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-12-06 22:16:06,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-12-06 22:16:06,813 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1762969836, now seen corresponding path program 168 times [2021-12-06 22:16:06,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772128287] [2021-12-06 22:16:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:06,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 3570 proven. 10711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:08,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772128287] [2021-12-06 22:16:08,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772128287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896845557] [2021-12-06 22:16:08,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:16:08,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:08,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:08,598 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:08,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-12-06 22:16:08,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-12-06 22:16:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:16:08,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 173 conjunts are in the unsatisfiable core [2021-12-06 22:16:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 3655 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:09,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 3655 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896845557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:09,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 91 [2021-12-06 22:16:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192980371] [2021-12-06 22:16:09,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 22:16:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 22:16:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3836, Invalid=4354, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 22:16:09,619 INFO L87 Difference]: Start difference. First operand 345 states and 346 transitions. Second operand has 91 states, 91 states have (on average 3.8241758241758244) internal successors, (348), 91 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:11,054 INFO L93 Difference]: Finished difference Result 356 states and 357 transitions. [2021-12-06 22:16:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-12-06 22:16:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.8241758241758244) internal successors, (348), 91 states have internal predecessors, (348), 0 states have call successors, (0), 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 344 [2021-12-06 22:16:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:11,055 INFO L225 Difference]: With dead ends: 356 [2021-12-06 22:16:11,055 INFO L226 Difference]: Without dead ends: 354 [2021-12-06 22:16:11,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 768 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7903 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=11666, Invalid=19840, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 22:16:11,056 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 358 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:11,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 41 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:16:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-06 22:16:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 348. [2021-12-06 22:16:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.005763688760807) internal successors, (349), 347 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 349 transitions. [2021-12-06 22:16:11,142 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 349 transitions. Word has length 344 [2021-12-06 22:16:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:11,142 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 349 transitions. [2021-12-06 22:16:11,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.8241758241758244) internal successors, (348), 91 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 349 transitions. [2021-12-06 22:16:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-06 22:16:11,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:11,144 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:11,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-12-06 22:16:11,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:11,345 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1779109069, now seen corresponding path program 169 times [2021-12-06 22:16:11,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998323578] [2021-12-06 22:16:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:11,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 10627 proven. 3908 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:16,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998323578] [2021-12-06 22:16:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998323578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:16,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838282759] [2021-12-06 22:16:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:16:16,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:16,168 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:16,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-12-06 22:16:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 174 conjunts are in the unsatisfiable core [2021-12-06 22:16:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 10880 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:22,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 10880 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:23,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838282759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:23,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:23,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [175, 175, 175] total 263 [2021-12-06 22:16:23,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157393393] [2021-12-06 22:16:23,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:23,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2021-12-06 22:16:23,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2021-12-06 22:16:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15404, Invalid=53502, Unknown=0, NotChecked=0, Total=68906 [2021-12-06 22:16:23,043 INFO L87 Difference]: Start difference. First operand 348 states and 349 transitions. Second operand has 263 states, 263 states have (on average 2.3193916349809887) internal successors, (610), 263 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:27,074 INFO L93 Difference]: Finished difference Result 611 states and 613 transitions. [2021-12-06 22:16:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-12-06 22:16:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 2.3193916349809887) internal successors, (610), 263 states have internal predecessors, (610), 0 states have call successors, (0), 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 347 [2021-12-06 22:16:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:27,075 INFO L225 Difference]: With dead ends: 611 [2021-12-06 22:16:27,075 INFO L226 Difference]: Without dead ends: 349 [2021-12-06 22:16:27,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26863 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=26891, Invalid=95259, Unknown=0, NotChecked=0, Total=122150 [2021-12-06 22:16:27,080 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 11 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:27,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1379 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:16:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-06 22:16:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-12-06 22:16:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.0057471264367817) internal successors, (350), 348 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2021-12-06 22:16:27,175 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 347 [2021-12-06 22:16:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:27,175 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2021-12-06 22:16:27,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 2.3193916349809887) internal successors, (610), 263 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2021-12-06 22:16:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-06 22:16:27,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:27,177 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:27,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-12-06 22:16:27,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-12-06 22:16:27,378 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1376731016, now seen corresponding path program 170 times [2021-12-06 22:16:27,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:27,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38706952] [2021-12-06 22:16:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:27,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14621 backedges. 3655 proven. 10966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:29,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:29,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38706952] [2021-12-06 22:16:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38706952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:29,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403386140] [2021-12-06 22:16:29,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:16:29,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:29,096 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:29,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-12-06 22:16:29,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:16:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:16:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 175 conjunts are in the unsatisfiable core [2021-12-06 22:16:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14621 backedges. 3741 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:29,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14621 backedges. 3741 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:29,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403386140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:29,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:29,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 92 [2021-12-06 22:16:29,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115065958] [2021-12-06 22:16:29,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:29,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 22:16:29,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 22:16:29,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3924, Invalid=4448, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:16:29,873 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand has 92 states, 92 states have (on average 3.8260869565217392) internal successors, (352), 92 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:31,312 INFO L93 Difference]: Finished difference Result 360 states and 361 transitions. [2021-12-06 22:16:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-12-06 22:16:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.8260869565217392) internal successors, (352), 92 states have internal predecessors, (352), 0 states have call successors, (0), 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 348 [2021-12-06 22:16:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:31,313 INFO L225 Difference]: With dead ends: 360 [2021-12-06 22:16:31,313 INFO L226 Difference]: Without dead ends: 358 [2021-12-06 22:16:31,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 777 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8082 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=11932, Invalid=20288, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 22:16:31,315 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:31,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 33 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:16:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-06 22:16:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 352. [2021-12-06 22:16:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0056980056980056) internal successors, (353), 351 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2021-12-06 22:16:31,412 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 348 [2021-12-06 22:16:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:31,412 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2021-12-06 22:16:31,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.8260869565217392) internal successors, (352), 92 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2021-12-06 22:16:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-06 22:16:31,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:31,413 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:31,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-12-06 22:16:31,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:31,614 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:31,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1555808433, now seen corresponding path program 171 times [2021-12-06 22:16:31,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:31,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892877580] [2021-12-06 22:16:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:31,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 10881 proven. 3997 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:36,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892877580] [2021-12-06 22:16:36,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892877580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763206066] [2021-12-06 22:16:36,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:16:36,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:36,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:36,865 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:36,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-12-06 22:16:37,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2021-12-06 22:16:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:16:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 176 conjunts are in the unsatisfiable core [2021-12-06 22:16:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 11137 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:43,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 11137 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:44,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763206066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:44,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:44,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [177, 177, 177] total 266 [2021-12-06 22:16:44,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312404423] [2021-12-06 22:16:44,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 266 states [2021-12-06 22:16:44,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 266 interpolants. [2021-12-06 22:16:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15757, Invalid=54733, Unknown=0, NotChecked=0, Total=70490 [2021-12-06 22:16:44,022 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand has 266 states, 266 states have (on average 2.319548872180451) internal successors, (617), 266 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:48,195 INFO L93 Difference]: Finished difference Result 618 states and 620 transitions. [2021-12-06 22:16:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-12-06 22:16:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 266 states, 266 states have (on average 2.319548872180451) internal successors, (617), 266 states have internal predecessors, (617), 0 states have call successors, (0), 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 351 [2021-12-06 22:16:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:48,196 INFO L225 Difference]: With dead ends: 618 [2021-12-06 22:16:48,196 INFO L226 Difference]: Without dead ends: 353 [2021-12-06 22:16:48,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27480 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=27508, Invalid=97454, Unknown=0, NotChecked=0, Total=124962 [2021-12-06 22:16:48,200 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 11 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:48,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1312 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:16:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-06 22:16:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-12-06 22:16:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0056818181818181) internal successors, (354), 352 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 354 transitions. [2021-12-06 22:16:48,290 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 354 transitions. Word has length 351 [2021-12-06 22:16:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:48,290 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 354 transitions. [2021-12-06 22:16:48,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 266 states, 266 states have (on average 2.319548872180451) internal successors, (617), 266 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 354 transitions. [2021-12-06 22:16:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-12-06 22:16:48,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:48,292 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:48,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-12-06 22:16:48,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:48,493 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1839341036, now seen corresponding path program 172 times [2021-12-06 22:16:48,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:48,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520905144] [2021-12-06 22:16:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:48,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14965 backedges. 3741 proven. 11224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:50,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520905144] [2021-12-06 22:16:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520905144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714607442] [2021-12-06 22:16:50,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:16:50,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:50,252 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:50,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-12-06 22:16:50,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:16:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:16:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 177 conjunts are in the unsatisfiable core [2021-12-06 22:16:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:16:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14965 backedges. 3828 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:50,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14965 backedges. 3828 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:51,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714607442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:51,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:51,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 93 [2021-12-06 22:16:51,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787091948] [2021-12-06 22:16:51,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:51,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-06 22:16:51,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-06 22:16:51,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4013, Invalid=4543, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 22:16:51,062 INFO L87 Difference]: Start difference. First operand 353 states and 354 transitions. Second operand has 93 states, 93 states have (on average 3.827956989247312) internal successors, (356), 93 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:16:52,542 INFO L93 Difference]: Finished difference Result 364 states and 365 transitions. [2021-12-06 22:16:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-12-06 22:16:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.827956989247312) internal successors, (356), 93 states have internal predecessors, (356), 0 states have call successors, (0), 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 352 [2021-12-06 22:16:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:16:52,543 INFO L225 Difference]: With dead ends: 364 [2021-12-06 22:16:52,543 INFO L226 Difference]: Without dead ends: 362 [2021-12-06 22:16:52,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 786 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8263 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=12201, Invalid=20741, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 22:16:52,544 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:16:52,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 26 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:16:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-06 22:16:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 356. [2021-12-06 22:16:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.0056338028169014) internal successors, (357), 355 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 357 transitions. [2021-12-06 22:16:52,634 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 357 transitions. Word has length 352 [2021-12-06 22:16:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:16:52,635 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 357 transitions. [2021-12-06 22:16:52,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.827956989247312) internal successors, (356), 93 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:16:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 357 transitions. [2021-12-06 22:16:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-06 22:16:52,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:16:52,636 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2021-12-06 22:16:52,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-12-06 22:16:52,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:52,837 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:16:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:16:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash 620861389, now seen corresponding path program 173 times [2021-12-06 22:16:52,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:16:52,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631579701] [2021-12-06 22:16:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:16:52,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:16:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:16:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 11138 proven. 4087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:57,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:16:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631579701] [2021-12-06 22:16:57,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631579701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:16:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865227372] [2021-12-06 22:16:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:16:57,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:16:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:16:57,769 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:16:57,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-12-06 22:16:58,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2021-12-06 22:16:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:16:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 178 conjunts are in the unsatisfiable core [2021-12-06 22:16:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:17:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 11397 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:17:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:17:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 11397 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:17:05,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865227372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:17:05,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:17:05,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [179, 179, 179] total 269 [2021-12-06 22:17:05,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171334555] [2021-12-06 22:17:05,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:17:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2021-12-06 22:17:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:17:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2021-12-06 22:17:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16114, Invalid=55978, Unknown=0, NotChecked=0, Total=72092 [2021-12-06 22:17:05,163 INFO L87 Difference]: Start difference. First operand 356 states and 357 transitions. Second operand has 269 states, 269 states have (on average 2.319702602230483) internal successors, (624), 269 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:17:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:17:09,325 INFO L93 Difference]: Finished difference Result 625 states and 627 transitions. [2021-12-06 22:17:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-12-06 22:17:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 2.319702602230483) internal successors, (624), 269 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-12-06 22:17:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:17:09,326 INFO L225 Difference]: With dead ends: 625 [2021-12-06 22:17:09,326 INFO L226 Difference]: Without dead ends: 357 [2021-12-06 22:17:09,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28104 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=28132, Invalid=99674, Unknown=0, NotChecked=0, Total=127806 [2021-12-06 22:17:09,331 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 11 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:17:09,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1272 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:17:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-06 22:17:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-12-06 22:17:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.0056179775280898) internal successors, (358), 356 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:17:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 358 transitions. [2021-12-06 22:17:09,422 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 358 transitions. Word has length 355 [2021-12-06 22:17:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:17:09,422 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 358 transitions. [2021-12-06 22:17:09,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 2.319702602230483) internal successors, (624), 269 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:17:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 358 transitions. [2021-12-06 22:17:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-12-06 22:17:09,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:17:09,424 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1, 1, 1] [2021-12-06 22:17:09,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-12-06 22:17:09,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:17:09,624 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:17:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:17:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1957748616, now seen corresponding path program 174 times [2021-12-06 22:17:09,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:17:09,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640528691] [2021-12-06 22:17:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:17:09,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:17:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:17:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15313 backedges. 3828 proven. 11485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:17:11,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:17:11,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640528691] [2021-12-06 22:17:11,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640528691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:17:11,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447972546] [2021-12-06 22:17:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:17:11,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:17:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:17:11,402 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:17:11,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd7abe4-2814-49fe-bd63-2c5887208728/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-12-06 22:17:11,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2021-12-06 22:17:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:17:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 179 conjunts are in the unsatisfiable core [2021-12-06 22:17:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:17:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15313 backedges. 3916 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:17:12,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:17:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15313 backedges. 3916 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:17:12,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447972546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:17:12,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:17:12,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92, 92] total 94 [2021-12-06 22:17:12,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076319623] [2021-12-06 22:17:12,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:17:12,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 22:17:12,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:17:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 22:17:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4103, Invalid=4639, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 22:17:12,543 INFO L87 Difference]: Start difference. First operand 357 states and 358 transitions. Second operand has 94 states, 94 states have (on average 3.8297872340425534) internal successors, (360), 94 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)