./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 92efbe3ff013b6b09e676ab9ef9cb1143c6fae1c9707966a72915cfe34a9681e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:49:41,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:49:41,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:49:41,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:49:41,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:49:41,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:49:41,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:49:41,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:49:41,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:49:41,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:49:41,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:49:41,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:49:41,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:49:41,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:49:41,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:49:41,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:49:41,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:49:41,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:49:41,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:49:41,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:49:41,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:49:41,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:49:41,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:49:41,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:49:41,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:49:41,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:49:41,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:49:41,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:49:41,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:49:41,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:49:41,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:49:41,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:49:41,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:49:41,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:49:41,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:49:41,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:49:41,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:49:41,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:49:41,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:49:41,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:49:41,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:49:41,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:49:41,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:49:41,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:49:41,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:49:41,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:49:41,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:49:41,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:49:41,938 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:49:41,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:49:41,939 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:49:41,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:49:41,939 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:49:41,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:49:41,940 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:49:41,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:49:41,940 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:49:41,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:49:41,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:49:41,941 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:49:41,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:49:41,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:49:41,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:49:41,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:49:41,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:49:41,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:49:41,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:49:41,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:49:41,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:49:41,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:49:41,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:49:41,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:41,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:49:41,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:49:41,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:49:41,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:49:41,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:49:41,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:49:41,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:49:41,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:49:41,946 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_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92efbe3ff013b6b09e676ab9ef9cb1143c6fae1c9707966a72915cfe34a9681e [2022-11-03 02:49:42,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:42,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:42,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:42,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:42,295 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:42,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:49:42,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/bad951ca3/2e96d6becb444645b40b63eee17df24d/FLAG9d383d94b [2022-11-03 02:49:43,060 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:43,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:49:43,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/bad951ca3/2e96d6becb444645b40b63eee17df24d/FLAG9d383d94b [2022-11-03 02:49:43,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/bad951ca3/2e96d6becb444645b40b63eee17df24d [2022-11-03 02:49:43,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:43,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:43,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:43,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:43,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:43,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:43" (1/1) ... [2022-11-03 02:49:43,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7d2cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:43, skipping insertion in model container [2022-11-03 02:49:43,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:43" (1/1) ... [2022-11-03 02:49:43,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:43,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:43,599 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_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c[1014,1027] [2022-11-03 02:49:44,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:44,026 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:44,037 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_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c[1014,1027] [2022-11-03 02:49:44,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:44,303 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:44,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44 WrapperNode [2022-11-03 02:49:44,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:44,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:44,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:44,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:44,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,672 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2442 [2022-11-03 02:49:44,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:44,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:44,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:44,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:44,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:44,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:45,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:45,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:45,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:45,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:45,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (1/1) ... [2022-11-03 02:49:45,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:45,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:45,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:45,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:45,685 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:45,687 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:40,159 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:51:21,475 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:51:21,476 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:51:21,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:21 BoogieIcfgContainer [2022-11-03 02:51:21,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:51:21,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:51:21,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:51:21,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:51:21,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:43" (1/3) ... [2022-11-03 02:51:21,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abd40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:21, skipping insertion in model container [2022-11-03 02:51:21,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:44" (2/3) ... [2022-11-03 02:51:21,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abd40b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:21, skipping insertion in model container [2022-11-03 02:51:21,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:21" (3/3) ... [2022-11-03 02:51:21,485 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:51:21,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:51:21,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:51:21,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:51:21,551 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7aa7d8d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:51:21,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:51:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-03 02:51:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:51:21,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:21,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:51:21,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 17512656, now seen corresponding path program 1 times [2022-11-03 02:51:21,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:21,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12345782] [2022-11-03 02:51:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:51:22,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:51:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:51:22,773 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:51:22,776 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:51:22,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:51:22,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:51:22,785 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:51:22,789 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:51:22,842 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:51:22,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:51:22 BoogieIcfgContainer [2022-11-03 02:51:22,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:51:22,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:51:22,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:51:22,857 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:51:22,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:21" (3/4) ... [2022-11-03 02:51:22,861 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:51:22,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:51:22,863 INFO L158 Benchmark]: Toolchain (without parser) took 99607.55ms. Allocated memory was 136.3MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 95.1MB in the beginning and 4.3GB in the end (delta: -4.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 02:51:22,865 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:51:22,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1045.16ms. Allocated memory was 136.3MB in the beginning and 192.9MB in the end (delta: 56.6MB). Free memory was 94.9MB in the beginning and 149.8MB in the end (delta: -54.8MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2022-11-03 02:51:22,867 INFO L158 Benchmark]: Boogie Procedure Inliner took 368.79ms. Allocated memory is still 192.9MB. Free memory was 149.8MB in the beginning and 99.4MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-11-03 02:51:22,869 INFO L158 Benchmark]: Boogie Preprocessor took 333.23ms. Allocated memory is still 192.9MB. Free memory was 99.4MB in the beginning and 110.8MB in the end (delta: -11.3MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2022-11-03 02:51:22,870 INFO L158 Benchmark]: RCFGBuilder took 96470.35ms. Allocated memory was 192.9MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 110.8MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-11-03 02:51:22,872 INFO L158 Benchmark]: TraceAbstraction took 1375.82ms. Allocated memory is still 5.6GB. Free memory was 4.4GB in the beginning and 4.3GB in the end (delta: 108.0MB). Peak memory consumption was 109.1MB. Max. memory is 16.1GB. [2022-11-03 02:51:22,873 INFO L158 Benchmark]: Witness Printer took 5.87ms. Allocated memory is still 5.6GB. Free memory was 4.3GB in the beginning and 4.3GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:51:22,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1045.16ms. Allocated memory was 136.3MB in the beginning and 192.9MB in the end (delta: 56.6MB). Free memory was 94.9MB in the beginning and 149.8MB in the end (delta: -54.8MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 368.79ms. Allocated memory is still 192.9MB. Free memory was 149.8MB in the beginning and 99.4MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 333.23ms. Allocated memory is still 192.9MB. Free memory was 99.4MB in the beginning and 110.8MB in the end (delta: -11.3MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * RCFGBuilder took 96470.35ms. Allocated memory was 192.9MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 110.8MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * TraceAbstraction took 1375.82ms. Allocated memory is still 5.6GB. Free memory was 4.4GB in the beginning and 4.3GB in the end (delta: 108.0MB). Peak memory consumption was 109.1MB. Max. memory is 16.1GB. * Witness Printer took 5.87ms. Allocated memory is still 5.6GB. Free memory was 4.3GB in the beginning and 4.3GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 285, overapproximation of bitwiseAnd at line 199. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_38 = 0; [L39] const SORT_4 var_81 = 1; [L40] const SORT_4 var_82 = 0; [L41] const SORT_2 var_94 = 0; [L42] const SORT_2 var_96 = 1; [L43] const SORT_3 var_116 = 0; [L44] const SORT_2 var_158 = 2; [L45] const SORT_4 var_306 = 4; [L46] const SORT_2 var_318 = 4; [L47] const SORT_4 var_320 = 7; [L48] const SORT_4 var_425 = 2; [L49] const SORT_4 var_469 = 3; [L51] SORT_1 input_93; [L52] SORT_1 input_95; [L53] SORT_1 input_100; [L54] SORT_1 input_101; [L55] SORT_1 input_105; [L56] SORT_1 input_106; [L57] SORT_1 input_110; [L58] SORT_1 input_111; [L59] SORT_1 input_115; [L60] SORT_1 input_123; [L61] SORT_1 input_130; [L62] SORT_1 input_137; [L63] SORT_1 input_144; [L64] SORT_1 input_148; [L65] SORT_1 input_149; [L66] SORT_1 input_166; [L67] SORT_1 input_170; [L68] SORT_1 input_171; [L69] SORT_1 input_187; [L70] SORT_1 input_191; [L71] SORT_1 input_192; [L72] SORT_1 input_208; [L73] SORT_1 input_212; [L74] SORT_1 input_213; [L75] SORT_1 input_236; [L76] SORT_1 input_239; [L77] SORT_1 input_255; [L78] SORT_1 input_258; [L79] SORT_1 input_274; [L80] SORT_1 input_277; [L81] SORT_1 input_293; [L82] SORT_1 input_296; [L84] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L88] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L89] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L90] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L91] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L92] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_2 init_7_arg_1 = var_5; [L123] state_6 = init_7_arg_1 [L124] SORT_2 init_9_arg_1 = var_5; [L125] state_8 = init_9_arg_1 [L126] SORT_2 init_11_arg_1 = var_5; [L127] state_10 = init_11_arg_1 [L128] SORT_2 init_13_arg_1 = var_5; [L129] state_12 = init_13_arg_1 [L130] SORT_2 init_15_arg_1 = var_5; [L131] state_14 = init_15_arg_1 [L132] SORT_2 init_17_arg_1 = var_5; [L133] state_16 = init_17_arg_1 [L134] SORT_2 init_19_arg_1 = var_5; [L135] state_18 = init_19_arg_1 [L136] SORT_2 init_21_arg_1 = var_5; [L137] state_20 = init_21_arg_1 [L138] SORT_2 init_23_arg_1 = var_5; [L139] state_22 = init_23_arg_1 [L140] SORT_2 init_25_arg_1 = var_5; [L141] state_24 = init_25_arg_1 [L142] SORT_2 init_27_arg_1 = var_5; [L143] state_26 = init_27_arg_1 [L144] SORT_2 init_29_arg_1 = var_5; [L145] state_28 = init_29_arg_1 [L146] SORT_2 init_31_arg_1 = var_5; [L147] state_30 = init_31_arg_1 [L148] SORT_2 init_33_arg_1 = var_5; [L149] state_32 = init_33_arg_1 [L150] SORT_2 init_35_arg_1 = var_5; [L151] state_34 = init_35_arg_1 [L152] SORT_2 init_37_arg_1 = var_5; [L153] state_36 = init_37_arg_1 [L154] SORT_1 init_40_arg_1 = var_38; [L155] state_39 = init_40_arg_1 [L156] SORT_1 init_42_arg_1 = var_38; [L157] state_41 = init_42_arg_1 [L158] SORT_1 init_44_arg_1 = var_38; [L159] state_43 = init_44_arg_1 [L160] SORT_1 init_46_arg_1 = var_38; [L161] state_45 = init_46_arg_1 [L162] SORT_1 init_48_arg_1 = var_38; [L163] state_47 = init_48_arg_1 [L164] SORT_1 init_50_arg_1 = var_38; [L165] state_49 = init_50_arg_1 [L166] SORT_1 init_52_arg_1 = var_38; [L167] state_51 = init_52_arg_1 [L168] SORT_1 init_54_arg_1 = var_38; [L169] state_53 = init_54_arg_1 [L170] SORT_1 init_56_arg_1 = var_38; [L171] state_55 = init_56_arg_1 [L172] SORT_1 init_58_arg_1 = var_38; [L173] state_57 = init_58_arg_1 [L174] SORT_1 init_60_arg_1 = var_38; [L175] state_59 = init_60_arg_1 [L176] SORT_1 init_62_arg_1 = var_38; [L177] state_61 = init_62_arg_1 [L178] SORT_1 init_64_arg_1 = var_38; [L179] state_63 = init_64_arg_1 [L180] SORT_1 init_66_arg_1 = var_38; [L181] state_65 = init_66_arg_1 [L182] SORT_1 init_68_arg_1 = var_38; [L183] state_67 = init_68_arg_1 [L184] SORT_1 init_70_arg_1 = var_38; [L185] state_69 = init_70_arg_1 [L186] SORT_1 init_72_arg_1 = var_38; [L187] state_71 = init_72_arg_1 [L188] SORT_1 init_74_arg_1 = var_38; [L189] state_73 = init_74_arg_1 [L190] SORT_1 init_76_arg_1 = var_38; [L191] state_75 = init_76_arg_1 [L192] SORT_1 init_78_arg_1 = var_38; [L193] state_77 = init_78_arg_1 [L194] SORT_1 init_80_arg_1 = var_38; [L195] state_79 = init_80_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, var_116=0, var_158=2, var_306=4, var_318=4, var_320=7, var_38=0, var_425=2, var_469=3, var_5=0, var_81=1, var_82=0, var_94=0, var_96=1] [L198] input_93 = __VERIFIER_nondet_uchar() [L199] input_93 = input_93 & mask_SORT_1 [L200] input_95 = __VERIFIER_nondet_uchar() [L201] input_95 = input_95 & mask_SORT_1 [L202] input_100 = __VERIFIER_nondet_uchar() [L203] input_100 = input_100 & mask_SORT_1 [L204] input_101 = __VERIFIER_nondet_uchar() [L205] input_101 = input_101 & mask_SORT_1 [L206] input_105 = __VERIFIER_nondet_uchar() [L207] input_105 = input_105 & mask_SORT_1 [L208] input_106 = __VERIFIER_nondet_uchar() [L209] input_106 = input_106 & mask_SORT_1 [L210] input_110 = __VERIFIER_nondet_uchar() [L211] input_110 = input_110 & mask_SORT_1 [L212] input_111 = __VERIFIER_nondet_uchar() [L213] input_111 = input_111 & mask_SORT_1 [L214] input_115 = __VERIFIER_nondet_uchar() [L215] input_115 = input_115 & mask_SORT_1 [L216] input_123 = __VERIFIER_nondet_uchar() [L217] input_123 = input_123 & mask_SORT_1 [L218] input_130 = __VERIFIER_nondet_uchar() [L219] input_130 = input_130 & mask_SORT_1 [L220] input_137 = __VERIFIER_nondet_uchar() [L221] input_137 = input_137 & mask_SORT_1 [L222] input_144 = __VERIFIER_nondet_uchar() [L223] input_144 = input_144 & mask_SORT_1 [L224] input_148 = __VERIFIER_nondet_uchar() [L225] input_148 = input_148 & mask_SORT_1 [L226] input_149 = __VERIFIER_nondet_uchar() [L227] input_149 = input_149 & mask_SORT_1 [L228] input_166 = __VERIFIER_nondet_uchar() [L229] input_166 = input_166 & mask_SORT_1 [L230] input_170 = __VERIFIER_nondet_uchar() [L231] input_170 = input_170 & mask_SORT_1 [L232] input_171 = __VERIFIER_nondet_uchar() [L233] input_171 = input_171 & mask_SORT_1 [L234] input_187 = __VERIFIER_nondet_uchar() [L235] input_187 = input_187 & mask_SORT_1 [L236] input_191 = __VERIFIER_nondet_uchar() [L237] input_191 = input_191 & mask_SORT_1 [L238] input_192 = __VERIFIER_nondet_uchar() [L239] input_192 = input_192 & mask_SORT_1 [L240] input_208 = __VERIFIER_nondet_uchar() [L241] input_208 = input_208 & mask_SORT_1 [L242] input_212 = __VERIFIER_nondet_uchar() [L243] input_212 = input_212 & mask_SORT_1 [L244] input_213 = __VERIFIER_nondet_uchar() [L245] input_213 = input_213 & mask_SORT_1 [L246] input_236 = __VERIFIER_nondet_uchar() [L247] input_239 = __VERIFIER_nondet_uchar() [L248] input_255 = __VERIFIER_nondet_uchar() [L249] input_258 = __VERIFIER_nondet_uchar() [L250] input_274 = __VERIFIER_nondet_uchar() [L251] input_277 = __VERIFIER_nondet_uchar() [L252] input_293 = __VERIFIER_nondet_uchar() [L253] input_296 = __VERIFIER_nondet_uchar() [L256] SORT_1 var_83_arg_0 = state_47; [L257] SORT_4 var_83_arg_1 = var_81; [L258] SORT_4 var_83_arg_2 = var_82; [L259] EXPR var_83_arg_0 ? var_83_arg_1 : var_83_arg_2 [L259] SORT_4 var_83 = var_83_arg_0 ? var_83_arg_1 : var_83_arg_2; [L260] SORT_1 var_84_arg_0 = state_57; [L261] SORT_4 var_84_arg_1 = var_81; [L262] SORT_4 var_84_arg_2 = var_82; [L263] EXPR var_84_arg_0 ? var_84_arg_1 : var_84_arg_2 [L263] SORT_4 var_84 = var_84_arg_0 ? var_84_arg_1 : var_84_arg_2; [L264] SORT_4 var_85_arg_0 = var_83; [L265] SORT_4 var_85_arg_1 = var_84; [L266] SORT_4 var_85 = var_85_arg_0 + var_85_arg_1; [L267] SORT_1 var_86_arg_0 = state_67; [L268] SORT_4 var_86_arg_1 = var_81; [L269] SORT_4 var_86_arg_2 = var_82; [L270] EXPR var_86_arg_0 ? var_86_arg_1 : var_86_arg_2 [L270] SORT_4 var_86 = var_86_arg_0 ? var_86_arg_1 : var_86_arg_2; [L271] SORT_4 var_87_arg_0 = var_85; [L272] SORT_4 var_87_arg_1 = var_86; [L273] SORT_4 var_87 = var_87_arg_0 + var_87_arg_1; [L274] SORT_1 var_88_arg_0 = state_77; [L275] SORT_4 var_88_arg_1 = var_81; [L276] SORT_4 var_88_arg_2 = var_82; [L277] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L277] SORT_4 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L278] SORT_4 var_89_arg_0 = var_87; [L279] SORT_4 var_89_arg_1 = var_88; [L280] SORT_4 var_89 = var_89_arg_0 + var_89_arg_1; [L281] var_89 = var_89 & mask_SORT_4 [L282] SORT_4 var_90_arg_0 = var_89; [L283] SORT_4 var_90_arg_1 = var_81; [L284] SORT_1 var_90 = var_90_arg_0 <= var_90_arg_1; [L285] SORT_1 var_91_arg_0 = ~state_79; [L286] var_91_arg_0 = var_91_arg_0 & mask_SORT_1 [L287] SORT_1 var_91_arg_1 = ~var_90; [L288] var_91_arg_1 = var_91_arg_1 & mask_SORT_1 [L289] SORT_1 var_91 = var_91_arg_0 & var_91_arg_1; [L290] var_91 = var_91 & mask_SORT_1 [L291] SORT_1 bad_92_arg_0 = var_91; [L292] CALL __VERIFIER_assert(!(bad_92_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:51:22,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 92efbe3ff013b6b09e676ab9ef9cb1143c6fae1c9707966a72915cfe34a9681e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:51:25,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:51:25,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:51:25,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:51:25,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:51:25,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:51:25,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:51:25,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:51:25,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:51:25,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:51:25,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:51:25,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:51:25,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:51:25,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:51:25,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:51:25,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:51:25,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:51:25,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:51:25,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:51:25,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:51:25,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:51:25,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:51:25,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:51:25,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:51:25,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:51:25,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:51:25,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:51:25,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:51:25,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:51:25,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:51:25,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:51:25,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:51:25,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:51:25,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:51:25,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:51:25,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:51:25,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:51:25,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:51:25,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:51:25,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:51:25,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:51:25,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:51:25,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:51:25,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:51:25,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:51:25,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:51:25,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:51:25,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:51:25,696 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:51:25,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:51:25,697 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:51:25,697 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:51:25,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:51:25,697 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:51:25,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:51:25,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:51:25,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:51:25,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:51:25,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:51:25,700 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:51:25,700 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:51:25,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:51:25,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:51:25,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:51:25,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:51:25,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:51:25,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:51:25,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:51:25,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:51:25,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:51:25,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:51:25,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:51:25,703 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:51:25,703 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:25,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:51:25,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:51:25,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:51:25,704 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92efbe3ff013b6b09e676ab9ef9cb1143c6fae1c9707966a72915cfe34a9681e [2022-11-03 02:51:26,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:51:26,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:51:26,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:51:26,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:51:26,101 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:51:26,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:51:26,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/592c43d9a/5c0e7f52fae348beae67224d3294f3b9/FLAGd4784b997 [2022-11-03 02:51:26,859 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:51:26,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:51:26,876 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/592c43d9a/5c0e7f52fae348beae67224d3294f3b9/FLAGd4784b997 [2022-11-03 02:51:27,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/data/592c43d9a/5c0e7f52fae348beae67224d3294f3b9 [2022-11-03 02:51:27,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:51:27,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:51:27,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:51:27,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:51:27,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:51:27,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:27,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3e61f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27, skipping insertion in model container [2022-11-03 02:51:27,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:27,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:51:27,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:51:27,336 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_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c[1014,1027] [2022-11-03 02:51:27,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:51:27,789 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:51:27,805 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_0d1315a0-c829-4b36-ab24-a05502575f8d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.5.prop1-func-interl.c[1014,1027] [2022-11-03 02:51:27,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:51:27,996 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:51:27,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27 WrapperNode [2022-11-03 02:51:27,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:51:27,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:51:27,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:51:28,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:51:28,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,195 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2442 [2022-11-03 02:51:28,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:51:28,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:51:28,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:51:28,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:51:28,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,368 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:51:28,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:51:28,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:51:28,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:51:28,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (1/1) ... [2022-11-03 02:51:28,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:51:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:28,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:51:28,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:51:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:51:28,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:51:29,086 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:51:29,088 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:51:31,106 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:51:31,122 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:51:31,123 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:51:31,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:31 BoogieIcfgContainer [2022-11-03 02:51:31,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:51:31,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:51:31,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:51:31,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:51:31,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:51:27" (1/3) ... [2022-11-03 02:51:31,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d7ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:31, skipping insertion in model container [2022-11-03 02:51:31,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:27" (2/3) ... [2022-11-03 02:51:31,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d7ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:31, skipping insertion in model container [2022-11-03 02:51:31,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:31" (3/3) ... [2022-11-03 02:51:31,137 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.5.prop1-func-interl.c [2022-11-03 02:51:31,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:51:31,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:51:31,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:51:31,236 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@229729b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:51:31,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:51:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.4967320261437909) internal successors, (229), 154 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) [2022-11-03 02:51:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:51:31,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:31,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:31,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1165686489, now seen corresponding path program 1 times [2022-11-03 02:51:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:31,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715074350] [2022-11-03 02:51:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:31,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:31,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:51:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:51:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:31,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:31,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715074350] [2022-11-03 02:51:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715074350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:31,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:31,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572967760] [2022-11-03 02:51:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:31,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:31,908 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.4967320261437909) internal successors, (229), 154 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) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:32,238 INFO L93 Difference]: Finished difference Result 601 states and 899 transitions. [2022-11-03 02:51:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2022-11-03 02:51:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:32,258 INFO L225 Difference]: With dead ends: 601 [2022-11-03 02:51:32,258 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:51:32,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:32,270 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 655 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:32,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 871 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:51:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 153. [2022-11-03 02:51:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 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) [2022-11-03 02:51:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 225 transitions. [2022-11-03 02:51:32,334 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 225 transitions. Word has length 13 [2022-11-03 02:51:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:32,334 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 225 transitions. [2022-11-03 02:51:32,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 225 transitions. [2022-11-03 02:51:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:51:32,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:32,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:32,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:32,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash 772659479, now seen corresponding path program 1 times [2022-11-03 02:51:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:32,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300821927] [2022-11-03 02:51:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:32,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:51:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:51:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:33,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:33,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300821927] [2022-11-03 02:51:33,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300821927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:33,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:33,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:33,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743851230] [2022-11-03 02:51:33,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:33,060 INFO L87 Difference]: Start difference. First operand 153 states and 225 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:33,306 INFO L93 Difference]: Finished difference Result 597 states and 883 transitions. [2022-11-03 02:51:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2022-11-03 02:51:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:33,312 INFO L225 Difference]: With dead ends: 597 [2022-11-03 02:51:33,312 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:51:33,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:33,314 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 649 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:33,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 870 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:51:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 155. [2022-11-03 02:51:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.474025974025974) internal successors, (227), 154 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 227 transitions. [2022-11-03 02:51:33,327 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 227 transitions. Word has length 13 [2022-11-03 02:51:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:33,328 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 227 transitions. [2022-11-03 02:51:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 227 transitions. [2022-11-03 02:51:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:51:33,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:33,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:33,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:33,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:33,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -36687147, now seen corresponding path program 1 times [2022-11-03 02:51:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439323631] [2022-11-03 02:51:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:33,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:33,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:33,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:51:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:51:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:34,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:34,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439323631] [2022-11-03 02:51:34,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439323631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:34,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:34,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112869344] [2022-11-03 02:51:34,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:34,045 INFO L87 Difference]: Start difference. First operand 155 states and 227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:34,281 INFO L93 Difference]: Finished difference Result 597 states and 882 transitions. [2022-11-03 02:51:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2022-11-03 02:51:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:34,285 INFO L225 Difference]: With dead ends: 597 [2022-11-03 02:51:34,285 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:51:34,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:34,287 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 643 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:34,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 869 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:51:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 157. [2022-11-03 02:51:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4679487179487178) internal successors, (229), 156 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) [2022-11-03 02:51:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-11-03 02:51:34,297 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 13 [2022-11-03 02:51:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:34,297 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-11-03 02:51:34,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-11-03 02:51:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:51:34,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:34,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:34,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 02:51:34,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:34,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash 20571155, now seen corresponding path program 1 times [2022-11-03 02:51:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752136031] [2022-11-03 02:51:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:34,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:34,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:34,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:51:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:34,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:51:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:35,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:35,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752136031] [2022-11-03 02:51:35,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752136031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:35,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:35,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132952659] [2022-11-03 02:51:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:35,012 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:35,191 INFO L93 Difference]: Finished difference Result 597 states and 881 transitions. [2022-11-03 02:51:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2022-11-03 02:51:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:35,196 INFO L225 Difference]: With dead ends: 597 [2022-11-03 02:51:35,196 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:51:35,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:35,198 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 637 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:35,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 871 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:51:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 159. [2022-11-03 02:51:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4620253164556962) internal successors, (231), 158 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 231 transitions. [2022-11-03 02:51:35,207 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 231 transitions. Word has length 13 [2022-11-03 02:51:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:35,207 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 231 transitions. [2022-11-03 02:51:35,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-03 02:51:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 231 transitions. [2022-11-03 02:51:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:51:35,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:35,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:35,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:35,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:35,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 20630737, now seen corresponding path program 1 times [2022-11-03 02:51:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809553626] [2022-11-03 02:51:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:35,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:35,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:35,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:35,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:51:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:51:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:36,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:36,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:36,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809553626] [2022-11-03 02:51:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809553626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:36,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:36,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:51:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787452508] [2022-11-03 02:51:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:51:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:51:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:51:36,346 INFO L87 Difference]: Start difference. First operand 159 states and 231 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) [2022-11-03 02:51:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:38,661 INFO L93 Difference]: Finished difference Result 789 states and 1159 transitions. [2022-11-03 02:51:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:51:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) Word has length 13 [2022-11-03 02:51:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:38,668 INFO L225 Difference]: With dead ends: 789 [2022-11-03 02:51:38,668 INFO L226 Difference]: Without dead ends: 787 [2022-11-03 02:51:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:51:38,670 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1947 mSDsluCounter, 2967 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:38,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 3193 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:51:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-03 02:51:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 167. [2022-11-03 02:51:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4578313253012047) internal successors, (242), 166 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) [2022-11-03 02:51:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 242 transitions. [2022-11-03 02:51:38,681 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 242 transitions. Word has length 13 [2022-11-03 02:51:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:38,682 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 242 transitions. [2022-11-03 02:51:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) [2022-11-03 02:51:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 242 transitions. [2022-11-03 02:51:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:38,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:38,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:38,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:38,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:38,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2059721643, now seen corresponding path program 1 times [2022-11-03 02:51:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:38,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734509582] [2022-11-03 02:51:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:38,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:38,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:51:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:40,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:40,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734509582] [2022-11-03 02:51:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734509582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:40,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:40,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066187196] [2022-11-03 02:51:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:40,232 INFO L87 Difference]: Start difference. First operand 167 states and 242 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:40,433 INFO L93 Difference]: Finished difference Result 619 states and 911 transitions. [2022-11-03 02:51:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 160 [2022-11-03 02:51:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:40,439 INFO L225 Difference]: With dead ends: 619 [2022-11-03 02:51:40,439 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:51:40,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:40,441 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 519 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:40,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 857 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:51:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 213. [2022-11-03 02:51:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4575471698113207) internal successors, (309), 212 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) [2022-11-03 02:51:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 309 transitions. [2022-11-03 02:51:40,450 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 309 transitions. Word has length 160 [2022-11-03 02:51:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:40,451 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 309 transitions. [2022-11-03 02:51:40,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 309 transitions. [2022-11-03 02:51:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:40,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:40,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:40,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:40,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2116804179, now seen corresponding path program 1 times [2022-11-03 02:51:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165316054] [2022-11-03 02:51:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:40,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:40,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:51:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:41,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:41,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165316054] [2022-11-03 02:51:41,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165316054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:41,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:41,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:51:41,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950557139] [2022-11-03 02:51:41,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:41,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:41,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:41,994 INFO L87 Difference]: Start difference. First operand 213 states and 309 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:42,248 INFO L93 Difference]: Finished difference Result 682 states and 1001 transitions. [2022-11-03 02:51:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:51:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:42,252 INFO L225 Difference]: With dead ends: 682 [2022-11-03 02:51:42,252 INFO L226 Difference]: Without dead ends: 525 [2022-11-03 02:51:42,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:42,253 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 812 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:42,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1269 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-03 02:51:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 215. [2022-11-03 02:51:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 214 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2022-11-03 02:51:42,263 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 160 [2022-11-03 02:51:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:42,263 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2022-11-03 02:51:42,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2022-11-03 02:51:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:42,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:42,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:42,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:42,482 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash 144769071, now seen corresponding path program 1 times [2022-11-03 02:51:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:42,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766435193] [2022-11-03 02:51:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:42,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:42,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:42,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:42,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:51:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:51:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:43,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766435193] [2022-11-03 02:51:43,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766435193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:43,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:43,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405733080] [2022-11-03 02:51:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:43,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:43,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:43,939 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:44,150 INFO L93 Difference]: Finished difference Result 424 states and 619 transitions. [2022-11-03 02:51:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 02:51:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:44,153 INFO L225 Difference]: With dead ends: 424 [2022-11-03 02:51:44,153 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:51:44,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:44,154 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 83 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:44,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1148 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-11-03 02:51:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:51:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-11-03 02:51:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4511278195488722) internal successors, (386), 266 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) [2022-11-03 02:51:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 386 transitions. [2022-11-03 02:51:44,163 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 386 transitions. Word has length 160 [2022-11-03 02:51:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:44,163 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 386 transitions. [2022-11-03 02:51:44,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 386 transitions. [2022-11-03 02:51:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:44,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:44,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:44,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:44,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 915502637, now seen corresponding path program 1 times [2022-11-03 02:51:44,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:44,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248475192] [2022-11-03 02:51:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:44,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:44,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:44,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:51:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:45,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:45,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248475192] [2022-11-03 02:51:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248475192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:45,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:45,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138508853] [2022-11-03 02:51:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:45,738 INFO L87 Difference]: Start difference. First operand 267 states and 386 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:45,919 INFO L93 Difference]: Finished difference Result 671 states and 984 transitions. [2022-11-03 02:51:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 160 [2022-11-03 02:51:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:45,924 INFO L225 Difference]: With dead ends: 671 [2022-11-03 02:51:45,924 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:51:45,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:45,925 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 467 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:45,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 855 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:51:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 285. [2022-11-03 02:51:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4507042253521127) internal successors, (412), 284 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 412 transitions. [2022-11-03 02:51:45,935 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 412 transitions. Word has length 160 [2022-11-03 02:51:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:45,935 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 412 transitions. [2022-11-03 02:51:45,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 412 transitions. [2022-11-03 02:51:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:45,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:45,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:45,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:46,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1502981841, now seen corresponding path program 1 times [2022-11-03 02:51:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:46,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364654303] [2022-11-03 02:51:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:46,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:46,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:46,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:46,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:51:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:47,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:47,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364654303] [2022-11-03 02:51:47,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364654303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:47,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:47,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:51:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931326859] [2022-11-03 02:51:47,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:47,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:47,560 INFO L87 Difference]: Start difference. First operand 285 states and 412 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:47,799 INFO L93 Difference]: Finished difference Result 754 states and 1104 transitions. [2022-11-03 02:51:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:51:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:47,802 INFO L225 Difference]: With dead ends: 754 [2022-11-03 02:51:47,802 INFO L226 Difference]: Without dead ends: 597 [2022-11-03 02:51:47,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:47,804 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 790 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:47,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 1266 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-11-03 02:51:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 287. [2022-11-03 02:51:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4475524475524475) internal successors, (414), 286 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) [2022-11-03 02:51:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 414 transitions. [2022-11-03 02:51:47,814 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 414 transitions. Word has length 160 [2022-11-03 02:51:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:47,814 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 414 transitions. [2022-11-03 02:51:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 414 transitions. [2022-11-03 02:51:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:47,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:47,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:47,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:48,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:48,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash -178125647, now seen corresponding path program 1 times [2022-11-03 02:51:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:48,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445153582] [2022-11-03 02:51:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:48,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:51:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:49,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:49,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445153582] [2022-11-03 02:51:49,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445153582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:49,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:49,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:49,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263326255] [2022-11-03 02:51:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:49,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:49,382 INFO L87 Difference]: Start difference. First operand 287 states and 414 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:49,551 INFO L93 Difference]: Finished difference Result 671 states and 982 transitions. [2022-11-03 02:51:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 160 [2022-11-03 02:51:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:49,556 INFO L225 Difference]: With dead ends: 671 [2022-11-03 02:51:49,556 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:51:49,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:49,557 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 415 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:49,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 853 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:51:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 305. [2022-11-03 02:51:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4473684210526316) internal successors, (440), 304 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 440 transitions. [2022-11-03 02:51:49,568 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 440 transitions. Word has length 160 [2022-11-03 02:51:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:49,568 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 440 transitions. [2022-11-03 02:51:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 440 transitions. [2022-11-03 02:51:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:49,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:49,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:49,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:49,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:49,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1864305485, now seen corresponding path program 1 times [2022-11-03 02:51:49,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832456773] [2022-11-03 02:51:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:49,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:49,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:51:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:51,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:51,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832456773] [2022-11-03 02:51:51,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832456773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:51,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:51,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:51:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843048317] [2022-11-03 02:51:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:51,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:51,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:51,091 INFO L87 Difference]: Start difference. First operand 305 states and 440 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:51,312 INFO L93 Difference]: Finished difference Result 774 states and 1132 transitions. [2022-11-03 02:51:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:51:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:51,315 INFO L225 Difference]: With dead ends: 774 [2022-11-03 02:51:51,315 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 02:51:51,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:51,316 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 768 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:51,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1263 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 02:51:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 307. [2022-11-03 02:51:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4444444444444444) internal successors, (442), 306 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) [2022-11-03 02:51:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 442 transitions. [2022-11-03 02:51:51,326 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 442 transitions. Word has length 160 [2022-11-03 02:51:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:51,327 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 442 transitions. [2022-11-03 02:51:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 442 transitions. [2022-11-03 02:51:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:51,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:51,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:51,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:51,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2013265205, now seen corresponding path program 1 times [2022-11-03 02:51:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352802841] [2022-11-03 02:51:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:51,551 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:51,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:51:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:51:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:52,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:52,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352802841] [2022-11-03 02:51:52,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352802841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:52,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:52,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070618971] [2022-11-03 02:51:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:52,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:52,672 INFO L87 Difference]: Start difference. First operand 307 states and 442 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:53,022 INFO L93 Difference]: Finished difference Result 798 states and 1161 transitions. [2022-11-03 02:51:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:51:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 02:51:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:53,025 INFO L225 Difference]: With dead ends: 798 [2022-11-03 02:51:53,025 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 02:51:53,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:51:53,026 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 485 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:53,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1901 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-11-03 02:51:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 02:51:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 437. [2022-11-03 02:51:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.438073394495413) internal successors, (627), 436 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 627 transitions. [2022-11-03 02:51:53,039 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 627 transitions. Word has length 160 [2022-11-03 02:51:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:53,040 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 627 transitions. [2022-11-03 02:51:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 627 transitions. [2022-11-03 02:51:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:53,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:53,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:53,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:53,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:53,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1721002313, now seen corresponding path program 1 times [2022-11-03 02:51:53,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:53,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120845849] [2022-11-03 02:51:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:53,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:53,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:51:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:51:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:54,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:54,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120845849] [2022-11-03 02:51:54,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120845849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:54,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:54,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791334849] [2022-11-03 02:51:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:54,615 INFO L87 Difference]: Start difference. First operand 437 states and 627 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:54,808 INFO L93 Difference]: Finished difference Result 624 states and 899 transitions. [2022-11-03 02:51:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 02:51:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:54,811 INFO L225 Difference]: With dead ends: 624 [2022-11-03 02:51:54,812 INFO L226 Difference]: Without dead ends: 467 [2022-11-03 02:51:54,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:54,813 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 60 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:54,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1200 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-11-03 02:51:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-03 02:51:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-11-03 02:51:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.4291845493562232) internal successors, (666), 466 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 666 transitions. [2022-11-03 02:51:54,848 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 666 transitions. Word has length 160 [2022-11-03 02:51:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:54,848 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 666 transitions. [2022-11-03 02:51:54,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:51:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 666 transitions. [2022-11-03 02:51:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:54,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:54,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:54,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:55,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1313047733, now seen corresponding path program 1 times [2022-11-03 02:51:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:55,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419481905] [2022-11-03 02:51:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:55,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:55,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:51:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:55,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:56,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:56,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419481905] [2022-11-03 02:51:56,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419481905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:56,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:56,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471799466] [2022-11-03 02:51:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:56,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:56,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:56,502 INFO L87 Difference]: Start difference. First operand 467 states and 666 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:56,702 INFO L93 Difference]: Finished difference Result 831 states and 1204 transitions. [2022-11-03 02:51:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 160 [2022-11-03 02:51:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:56,708 INFO L225 Difference]: With dead ends: 831 [2022-11-03 02:51:56,708 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 02:51:56,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:56,709 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 363 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 851 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 02:51:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 485. [2022-11-03 02:51:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.4297520661157024) internal successors, (692), 484 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 692 transitions. [2022-11-03 02:51:56,724 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 692 transitions. Word has length 160 [2022-11-03 02:51:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:56,725 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 692 transitions. [2022-11-03 02:51:56,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 02:51:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 692 transitions. [2022-11-03 02:51:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:56,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:56,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:56,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:56,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2088433225, now seen corresponding path program 1 times [2022-11-03 02:51:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:56,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273936588] [2022-11-03 02:51:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:56,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:56,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:56,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:56,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:51:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:58,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:58,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273936588] [2022-11-03 02:51:58,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273936588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:58,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:58,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:51:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399844272] [2022-11-03 02:51:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:58,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:58,253 INFO L87 Difference]: Start difference. First operand 485 states and 692 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:58,515 INFO L93 Difference]: Finished difference Result 894 states and 1294 transitions. [2022-11-03 02:51:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:51:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:58,519 INFO L225 Difference]: With dead ends: 894 [2022-11-03 02:51:58,519 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 02:51:58,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:58,522 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 630 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:58,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1182 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 02:51:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 495. [2022-11-03 02:51:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.4291497975708503) internal successors, (706), 494 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 706 transitions. [2022-11-03 02:51:58,538 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 706 transitions. Word has length 160 [2022-11-03 02:51:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:58,539 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 706 transitions. [2022-11-03 02:51:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:51:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 706 transitions. [2022-11-03 02:51:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:51:58,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:58,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:58,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:58,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1362528569, now seen corresponding path program 1 times [2022-11-03 02:51:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:58,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841597758] [2022-11-03 02:51:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:58,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:58,757 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:58,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:51:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:00,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:00,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:00,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841597758] [2022-11-03 02:52:00,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841597758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:00,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:00,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936830667] [2022-11-03 02:52:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:00,008 INFO L87 Difference]: Start difference. First operand 495 states and 706 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:00,253 INFO L93 Difference]: Finished difference Result 894 states and 1293 transitions. [2022-11-03 02:52:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:00,257 INFO L225 Difference]: With dead ends: 894 [2022-11-03 02:52:00,257 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 02:52:00,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:00,259 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 623 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:00,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 02:52:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 497. [2022-11-03 02:52:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.4274193548387097) internal successors, (708), 496 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 708 transitions. [2022-11-03 02:52:00,276 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 708 transitions. Word has length 160 [2022-11-03 02:52:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 708 transitions. [2022-11-03 02:52:00,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 708 transitions. [2022-11-03 02:52:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:00,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:00,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:00,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:52:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:00,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1290142011, now seen corresponding path program 1 times [2022-11-03 02:52:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:00,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32623960] [2022-11-03 02:52:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:00,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:00,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:00,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:52:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:01,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:01,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32623960] [2022-11-03 02:52:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32623960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:01,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174939030] [2022-11-03 02:52:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:01,838 INFO L87 Difference]: Start difference. First operand 497 states and 708 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:02,050 INFO L93 Difference]: Finished difference Result 914 states and 1322 transitions. [2022-11-03 02:52:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:02,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:02,053 INFO L225 Difference]: With dead ends: 914 [2022-11-03 02:52:02,053 INFO L226 Difference]: Without dead ends: 757 [2022-11-03 02:52:02,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:02,054 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 643 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:02,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1200 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-03 02:52:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 501. [2022-11-03 02:52:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.426) internal successors, (713), 500 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 713 transitions. [2022-11-03 02:52:02,069 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 713 transitions. Word has length 160 [2022-11-03 02:52:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:02,070 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 713 transitions. [2022-11-03 02:52:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 713 transitions. [2022-11-03 02:52:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:02,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:02,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:02,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:02,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1618621891, now seen corresponding path program 1 times [2022-11-03 02:52:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106808821] [2022-11-03 02:52:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:02,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:02,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:02,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:02,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:52:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:03,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:03,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106808821] [2022-11-03 02:52:03,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106808821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:03,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:03,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816666342] [2022-11-03 02:52:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:03,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:03,668 INFO L87 Difference]: Start difference. First operand 501 states and 713 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:03,903 INFO L93 Difference]: Finished difference Result 914 states and 1321 transitions. [2022-11-03 02:52:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:03,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:03,906 INFO L225 Difference]: With dead ends: 914 [2022-11-03 02:52:03,906 INFO L226 Difference]: Without dead ends: 757 [2022-11-03 02:52:03,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:03,907 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 636 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:03,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1175 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:03,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-03 02:52:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 503. [2022-11-03 02:52:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4243027888446216) internal successors, (715), 502 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 715 transitions. [2022-11-03 02:52:03,920 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 715 transitions. Word has length 160 [2022-11-03 02:52:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:03,920 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 715 transitions. [2022-11-03 02:52:03,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 715 transitions. [2022-11-03 02:52:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:03,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:03,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:03,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 02:52:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:04,150 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 304606143, now seen corresponding path program 1 times [2022-11-03 02:52:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521864344] [2022-11-03 02:52:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:04,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:04,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:04,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:52:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:05,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:05,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521864344] [2022-11-03 02:52:05,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521864344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:05,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:05,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805815587] [2022-11-03 02:52:05,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:05,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:05,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:05,442 INFO L87 Difference]: Start difference. First operand 503 states and 715 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:05,837 INFO L93 Difference]: Finished difference Result 818 states and 1180 transitions. [2022-11-03 02:52:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:05,842 INFO L225 Difference]: With dead ends: 818 [2022-11-03 02:52:05,842 INFO L226 Difference]: Without dead ends: 661 [2022-11-03 02:52:05,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:05,844 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 498 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:05,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 967 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:52:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-03 02:52:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 505. [2022-11-03 02:52:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.4226190476190477) internal successors, (717), 504 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 717 transitions. [2022-11-03 02:52:05,856 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 717 transitions. Word has length 160 [2022-11-03 02:52:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:05,857 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 717 transitions. [2022-11-03 02:52:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 717 transitions. [2022-11-03 02:52:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:05,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:05,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:05,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:06,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:06,073 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 164057533, now seen corresponding path program 1 times [2022-11-03 02:52:06,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:06,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30064901] [2022-11-03 02:52:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:06,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:06,076 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:52:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:07,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:07,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:07,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30064901] [2022-11-03 02:52:07,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30064901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:07,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:07,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153904258] [2022-11-03 02:52:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:07,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:07,423 INFO L87 Difference]: Start difference. First operand 505 states and 717 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:07,634 INFO L93 Difference]: Finished difference Result 934 states and 1349 transitions. [2022-11-03 02:52:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:07,638 INFO L225 Difference]: With dead ends: 934 [2022-11-03 02:52:07,638 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 02:52:07,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:07,640 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 654 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:07,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1217 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 02:52:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 507. [2022-11-03 02:52:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.4209486166007905) internal successors, (719), 506 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 719 transitions. [2022-11-03 02:52:07,654 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 719 transitions. Word has length 160 [2022-11-03 02:52:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:07,654 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 719 transitions. [2022-11-03 02:52:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 719 transitions. [2022-11-03 02:52:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:07,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:07,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:07,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 02:52:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:07,872 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1641380801, now seen corresponding path program 1 times [2022-11-03 02:52:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:07,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610451484] [2022-11-03 02:52:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:07,875 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:07,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:52:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:09,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:09,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:09,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610451484] [2022-11-03 02:52:09,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610451484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:09,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:09,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913448647] [2022-11-03 02:52:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:09,248 INFO L87 Difference]: Start difference. First operand 507 states and 719 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:09,449 INFO L93 Difference]: Finished difference Result 934 states and 1348 transitions. [2022-11-03 02:52:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:09,456 INFO L225 Difference]: With dead ends: 934 [2022-11-03 02:52:09,456 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 02:52:09,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:09,458 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 647 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:09,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1192 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 02:52:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 509. [2022-11-03 02:52:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.419291338582677) internal successors, (721), 508 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 721 transitions. [2022-11-03 02:52:09,470 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 721 transitions. Word has length 160 [2022-11-03 02:52:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:09,471 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 721 transitions. [2022-11-03 02:52:09,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 721 transitions. [2022-11-03 02:52:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:09,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:09,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:09,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 02:52:09,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:09,688 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1218678975, now seen corresponding path program 1 times [2022-11-03 02:52:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275718601] [2022-11-03 02:52:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:09,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:09,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:52:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:10,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:11,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:11,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275718601] [2022-11-03 02:52:11,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275718601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:11,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:11,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:11,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655121483] [2022-11-03 02:52:11,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:11,032 INFO L87 Difference]: Start difference. First operand 509 states and 721 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:11,211 INFO L93 Difference]: Finished difference Result 954 states and 1377 transitions. [2022-11-03 02:52:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:11,213 INFO L225 Difference]: With dead ends: 954 [2022-11-03 02:52:11,213 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:52:11,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:11,214 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 667 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:11,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1235 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:52:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 513. [2022-11-03 02:52:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.41796875) internal successors, (726), 512 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 726 transitions. [2022-11-03 02:52:11,227 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 726 transitions. Word has length 160 [2022-11-03 02:52:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:11,228 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 726 transitions. [2022-11-03 02:52:11,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 726 transitions. [2022-11-03 02:52:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:11,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:11,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:11,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 02:52:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:11,444 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1487940419, now seen corresponding path program 1 times [2022-11-03 02:52:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817727351] [2022-11-03 02:52:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:11,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:11,448 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:11,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:52:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:12,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:12,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:12,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817727351] [2022-11-03 02:52:12,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817727351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:12,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:12,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:12,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174107058] [2022-11-03 02:52:12,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:12,826 INFO L87 Difference]: Start difference. First operand 513 states and 726 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:13,023 INFO L93 Difference]: Finished difference Result 954 states and 1376 transitions. [2022-11-03 02:52:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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 160 [2022-11-03 02:52:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:13,026 INFO L225 Difference]: With dead ends: 954 [2022-11-03 02:52:13,026 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:52:13,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:52:13,027 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 660 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:13,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1210 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:52:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:52:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 515. [2022-11-03 02:52:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.416342412451362) internal successors, (728), 514 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 728 transitions. [2022-11-03 02:52:13,040 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 728 transitions. Word has length 160 [2022-11-03 02:52:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:13,041 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 728 transitions. [2022-11-03 02:52:13,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 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) [2022-11-03 02:52:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 728 transitions. [2022-11-03 02:52:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:13,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:13,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:13,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:13,264 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 208076741, now seen corresponding path program 1 times [2022-11-03 02:52:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:13,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897881670] [2022-11-03 02:52:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:13,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:13,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:13,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:52:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:15,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:16,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897881670] [2022-11-03 02:52:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897881670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [65891862] [2022-11-03 02:52:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:16,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:16,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:16,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:16,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:52:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:18,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:19,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [65891862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268743294] [2022-11-03 02:52:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:19,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:19,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:19,386 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:19,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:52:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:20,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:21,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268743294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:21,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:21,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:52:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046402249] [2022-11-03 02:52:21,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:52:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:52:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:52:21,693 INFO L87 Difference]: Start difference. First operand 515 states and 728 transitions. Second operand has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:22,007 INFO L93 Difference]: Finished difference Result 1100 states and 1563 transitions. [2022-11-03 02:52:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:52:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 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 [2022-11-03 02:52:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:22,011 INFO L225 Difference]: With dead ends: 1100 [2022-11-03 02:52:22,011 INFO L226 Difference]: Without dead ends: 943 [2022-11-03 02:52:22,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 936 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:52:22,013 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1194 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:22,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 2235 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-03 02:52:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-03 02:52:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 814. [2022-11-03 02:52:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.4022140221402215) internal successors, (1140), 813 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1140 transitions. [2022-11-03 02:52:22,032 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1140 transitions. Word has length 160 [2022-11-03 02:52:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:22,032 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1140 transitions. [2022-11-03 02:52:22,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.4375) internal successors, (311), 16 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1140 transitions. [2022-11-03 02:52:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:22,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:22,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:22,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:22,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:52:22,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:52:22,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:22,645 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash -184950269, now seen corresponding path program 1 times [2022-11-03 02:52:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:22,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220809133] [2022-11-03 02:52:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:22,648 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:22,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:52:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:24,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:25,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220809133] [2022-11-03 02:52:25,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220809133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036473509] [2022-11-03 02:52:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:25,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:52:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:28,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036473509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138625725] [2022-11-03 02:52:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:28,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:28,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:52:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138625725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:30,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:30,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:52:30,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443374204] [2022-11-03 02:52:30,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:30,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:52:30,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:52:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:52:30,880 INFO L87 Difference]: Start difference. First operand 814 states and 1140 transitions. Second operand has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 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) [2022-11-03 02:52:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:31,090 INFO L93 Difference]: Finished difference Result 1668 states and 2342 transitions. [2022-11-03 02:52:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:52:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 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) Word has length 160 [2022-11-03 02:52:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:31,094 INFO L225 Difference]: With dead ends: 1668 [2022-11-03 02:52:31,094 INFO L226 Difference]: Without dead ends: 1511 [2022-11-03 02:52:31,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 936 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:52:31,096 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 719 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:31,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2543 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-03 02:52:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-11-03 02:52:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1384. [2022-11-03 02:52:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3890093998553867) internal successors, (1921), 1383 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1921 transitions. [2022-11-03 02:52:31,129 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1921 transitions. Word has length 160 [2022-11-03 02:52:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:31,130 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1921 transitions. [2022-11-03 02:52:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 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) [2022-11-03 02:52:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1921 transitions. [2022-11-03 02:52:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:31,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:31,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:31,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:31,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:52:31,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 02:52:31,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:31,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash -994296895, now seen corresponding path program 1 times [2022-11-03 02:52:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:31,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978959323] [2022-11-03 02:52:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:31,750 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:52:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:34,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:34,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978959323] [2022-11-03 02:52:34,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978959323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:34,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [508864272] [2022-11-03 02:52:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:34,453 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:34,454 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:34,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:52:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:37,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:37,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [508864272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:37,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846164130] [2022-11-03 02:52:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:37,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:37,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:37,652 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:37,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:52:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:52:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846164130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:39,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:39,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:52:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916344606] [2022-11-03 02:52:39,766 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:39,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:52:39,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:52:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:52:39,768 INFO L87 Difference]: Start difference. First operand 1384 states and 1921 transitions. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 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) [2022-11-03 02:52:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:39,986 INFO L93 Difference]: Finished difference Result 2678 states and 3710 transitions. [2022-11-03 02:52:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:52:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-03 02:52:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:39,995 INFO L225 Difference]: With dead ends: 2678 [2022-11-03 02:52:39,996 INFO L226 Difference]: Without dead ends: 2521 [2022-11-03 02:52:39,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 936 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:52:39,997 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 539 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:39,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 2934 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 02:52:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2022-11-03 02:52:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2404. [2022-11-03 02:52:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 1.3745318352059925) internal successors, (3303), 2403 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3303 transitions. [2022-11-03 02:52:40,061 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3303 transitions. Word has length 160 [2022-11-03 02:52:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:40,061 INFO L495 AbstractCegarLoop]: Abstraction has 2404 states and 3303 transitions. [2022-11-03 02:52:40,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 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) [2022-11-03 02:52:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3303 transitions. [2022-11-03 02:52:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:52:40,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:40,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:40,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:40,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:40,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:40,673 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash -994237313, now seen corresponding path program 1 times [2022-11-03 02:52:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:40,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256019624] [2022-11-03 02:52:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:40,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:40,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:40,677 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:52:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:52:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:43,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:48,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256019624] [2022-11-03 02:52:48,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256019624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207322581] [2022-11-03 02:52:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:48,360 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:52:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:52:50,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:51,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207322581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123541255] [2022-11-03 02:53:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:51,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:51,498 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:51,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:53:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:52,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:53:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:55,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:54:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123541255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:03,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:03,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:54:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621062640] [2022-11-03 02:54:03,848 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:54:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:54:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1629, Unknown=28, NotChecked=0, Total=1892 [2022-11-03 02:54:03,851 INFO L87 Difference]: Start difference. First operand 2404 states and 3303 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:08,789 INFO L93 Difference]: Finished difference Result 4974 states and 6851 transitions. [2022-11-03 02:54:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:54:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 02:54:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:08,803 INFO L225 Difference]: With dead ends: 4974 [2022-11-03 02:54:08,803 INFO L226 Difference]: Without dead ends: 4972 [2022-11-03 02:54:08,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 929 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=663, Invalid=4279, Unknown=28, NotChecked=0, Total=4970 [2022-11-03 02:54:08,805 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1871 mSDsluCounter, 8783 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 9042 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:08,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 9042 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 248 Unchecked, 0.1s Time] [2022-11-03 02:54:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2022-11-03 02:54:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4935. [2022-11-03 02:54:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 1.3785974868261046) internal successors, (6802), 4934 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 6802 transitions. [2022-11-03 02:54:08,921 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 6802 transitions. Word has length 160 [2022-11-03 02:54:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:08,922 INFO L495 AbstractCegarLoop]: Abstraction has 4935 states and 6802 transitions. [2022-11-03 02:54:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 6802 transitions. [2022-11-03 02:54:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:54:08,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:08,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:08,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:09,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 02:54:09,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:54:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:09,545 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:09,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1347325695, now seen corresponding path program 1 times [2022-11-03 02:54:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369074566] [2022-11-03 02:54:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:09,549 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:09,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:54:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:54:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:13,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:19,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369074566] [2022-11-03 02:54:19,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369074566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:19,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400911232] [2022-11-03 02:54:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:19,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:19,125 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:54:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:54:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:23,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:27,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400911232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016656193] [2022-11-03 02:55:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:27,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:27,430 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:27,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:55:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:55:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:30,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:55:38,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016656193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:38,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:38,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:55:38,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960393587] [2022-11-03 02:55:38,535 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:38,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:55:38,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:55:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1630, Unknown=27, NotChecked=0, Total=1892 [2022-11-03 02:55:38,538 INFO L87 Difference]: Start difference. First operand 4935 states and 6802 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:43,647 INFO L93 Difference]: Finished difference Result 6931 states and 9576 transitions. [2022-11-03 02:55:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:55:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 02:55:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:43,672 INFO L225 Difference]: With dead ends: 6931 [2022-11-03 02:55:43,673 INFO L226 Difference]: Without dead ends: 6929 [2022-11-03 02:55:43,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 926 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 75.6s TimeCoverageRelationStatistics Valid=665, Invalid=4278, Unknown=27, NotChecked=0, Total=4970 [2022-11-03 02:55:43,677 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 2016 mSDsluCounter, 10846 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 11317 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:43,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 11317 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 239 Unchecked, 0.1s Time] [2022-11-03 02:55:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2022-11-03 02:55:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 6775. [2022-11-03 02:55:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6775 states, 6774 states have (on average 1.382344257454975) internal successors, (9364), 6774 states have internal predecessors, (9364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 9364 transitions. [2022-11-03 02:55:43,874 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 9364 transitions. Word has length 160 [2022-11-03 02:55:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:43,875 INFO L495 AbstractCegarLoop]: Abstraction has 6775 states and 9364 transitions. [2022-11-03 02:55:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 9364 transitions. [2022-11-03 02:55:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:55:43,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:43,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:43,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:44,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:55:44,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 02:55:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:44,510 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 919055491, now seen corresponding path program 1 times [2022-11-03 02:55:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628926525] [2022-11-03 02:55:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:44,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:44,513 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:44,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:55:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:55:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:55:47,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:56:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:56:00,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:56:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628926525] [2022-11-03 02:56:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628926525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:56:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176006281] [2022-11-03 02:56:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:00,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:56:00,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:56:00,952 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:56:00,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:56:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:56:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:56:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176006281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561733730] [2022-11-03 02:57:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:05,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:05,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:57:05,529 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:57:05,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:57:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:57:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:08,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:57:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561733730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:16,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:57:16,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:57:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550610146] [2022-11-03 02:57:16,333 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:57:16,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:57:16,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:57:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1626, Unknown=30, NotChecked=0, Total=1892 [2022-11-03 02:57:16,335 INFO L87 Difference]: Start difference. First operand 6775 states and 9364 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:22,568 INFO L93 Difference]: Finished difference Result 10606 states and 14764 transitions. [2022-11-03 02:57:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 02:57:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 02:57:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:22,577 INFO L225 Difference]: With dead ends: 10606 [2022-11-03 02:57:22,577 INFO L226 Difference]: Without dead ends: 10604 [2022-11-03 02:57:22,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 927 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=765, Invalid=5057, Unknown=30, NotChecked=0, Total=5852 [2022-11-03 02:57:22,581 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 3960 mSDsluCounter, 8114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3960 SdHoareTripleChecker+Valid, 8373 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:22,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3960 Valid, 8373 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 170 Unchecked, 0.0s Time] [2022-11-03 02:57:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10604 states. [2022-11-03 02:57:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10604 to 10366. [2022-11-03 02:57:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 1.3935359382537384) internal successors, (14444), 10365 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 14444 transitions. [2022-11-03 02:57:22,848 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 14444 transitions. Word has length 160 [2022-11-03 02:57:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:22,849 INFO L495 AbstractCegarLoop]: Abstraction has 10366 states and 14444 transitions. [2022-11-03 02:57:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 14444 transitions. [2022-11-03 02:57:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:57:22,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:22,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:22,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:57:23,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:57:23,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:57:23,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:57:23,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -903425021, now seen corresponding path program 1 times [2022-11-03 02:57:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:57:23,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933967683] [2022-11-03 02:57:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:57:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:57:23,480 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:57:23,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:57:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:57:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:24,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:57:24,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:57:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933967683] [2022-11-03 02:57:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933967683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:24,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:57:24,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:57:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147717105] [2022-11-03 02:57:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:24,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:57:24,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:57:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:57:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:57:24,756 INFO L87 Difference]: Start difference. First operand 10366 states and 14444 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:57:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:25,301 INFO L93 Difference]: Finished difference Result 13984 states and 19056 transitions. [2022-11-03 02:57:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:57:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 02:57:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:25,321 INFO L225 Difference]: With dead ends: 13984 [2022-11-03 02:57:25,321 INFO L226 Difference]: Without dead ends: 13033 [2022-11-03 02:57:25,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:57:25,327 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 148 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:25,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1672 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-11-03 02:57:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13033 states. [2022-11-03 02:57:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13033 to 10478. [2022-11-03 02:57:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10477 states have (on average 1.3923833158346854) internal successors, (14588), 10477 states have internal predecessors, (14588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 14588 transitions. [2022-11-03 02:57:25,648 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 14588 transitions. Word has length 160 [2022-11-03 02:57:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:25,649 INFO L495 AbstractCegarLoop]: Abstraction has 10478 states and 14588 transitions. [2022-11-03 02:57:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 02:57:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 14588 transitions. [2022-11-03 02:57:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:57:25,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:25,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:25,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 02:57:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:57:25,882 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash -243893499, now seen corresponding path program 1 times [2022-11-03 02:57:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:57:25,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194495603] [2022-11-03 02:57:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:57:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:57:25,885 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:57:25,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:57:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:57:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:29,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:38,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:57:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194495603] [2022-11-03 02:57:38,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194495603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177013044] [2022-11-03 02:57:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:57:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:57:38,202 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:57:38,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:57:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:57:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:42,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:58:39,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [177013044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:39,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106352702] [2022-11-03 02:58:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:39,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:58:39,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:58:39,621 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:58:39,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:58:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:58:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:43,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:58:54,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106352702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:54,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:58:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:58:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908411681] [2022-11-03 02:58:54,022 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:58:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:58:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:58:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:58:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1628, Unknown=29, NotChecked=0, Total=1892 [2022-11-03 02:58:54,025 INFO L87 Difference]: Start difference. First operand 10478 states and 14588 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:59:00,212 INFO L93 Difference]: Finished difference Result 12649 states and 17583 transitions. [2022-11-03 02:59:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:59:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 02:59:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:59:00,231 INFO L225 Difference]: With dead ends: 12649 [2022-11-03 02:59:00,231 INFO L226 Difference]: Without dead ends: 12647 [2022-11-03 02:59:00,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 926 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=660, Invalid=4281, Unknown=29, NotChecked=0, Total=4970 [2022-11-03 02:59:00,237 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 2329 mSDsluCounter, 7660 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 7919 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:59:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 7919 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-11-03 02:59:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12647 states. [2022-11-03 02:59:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12647 to 12526. [2022-11-03 02:59:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12526 states, 12525 states have (on average 1.39249500998004) internal successors, (17441), 12525 states have internal predecessors, (17441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12526 states to 12526 states and 17441 transitions. [2022-11-03 02:59:00,716 INFO L78 Accepts]: Start accepts. Automaton has 12526 states and 17441 transitions. Word has length 160 [2022-11-03 02:59:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:59:00,717 INFO L495 AbstractCegarLoop]: Abstraction has 12526 states and 17441 transitions. [2022-11-03 02:59:00,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:59:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 12526 states and 17441 transitions. [2022-11-03 02:59:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:59:00,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:59:00,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:59:00,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:59:00,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:59:01,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:59:01,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:01,359 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:59:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:59:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2022487687, now seen corresponding path program 1 times [2022-11-03 02:59:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:59:01,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298563775] [2022-11-03 02:59:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:59:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:59:01,362 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:59:01,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:59:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:59:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:59:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:59:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:59:12,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:59:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298563775] [2022-11-03 02:59:12,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298563775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:59:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [150866435] [2022-11-03 02:59:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:59:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:59:12,982 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:59:12,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:59:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:14,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:59:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:59:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:16,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [150866435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58452668] [2022-11-03 03:00:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:16,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:00:16,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:00:16,657 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:00:16,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 03:00:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:00:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:00:21,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:00:32,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58452668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:32,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:00:32,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 03:00:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110251346] [2022-11-03 03:00:32,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:00:32,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:00:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:00:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:00:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1632, Unknown=25, NotChecked=0, Total=1892 [2022-11-03 03:00:32,341 INFO L87 Difference]: Start difference. First operand 12526 states and 17441 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:00:42,148 INFO L93 Difference]: Finished difference Result 30097 states and 42298 transitions. [2022-11-03 03:00:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:00:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 03:00:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:00:42,178 INFO L225 Difference]: With dead ends: 30097 [2022-11-03 03:00:42,179 INFO L226 Difference]: Without dead ends: 30095 [2022-11-03 03:00:42,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 923 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=660, Invalid=4285, Unknown=25, NotChecked=0, Total=4970 [2022-11-03 03:00:42,185 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1546 mSDsluCounter, 8302 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 8560 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:00:42,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 8560 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-11-03 03:00:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30095 states. [2022-11-03 03:00:42,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30095 to 29487. [2022-11-03 03:00:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29487 states, 29486 states have (on average 1.4072780302516448) internal successors, (41495), 29486 states have internal predecessors, (41495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29487 states to 29487 states and 41495 transitions. [2022-11-03 03:00:43,047 INFO L78 Accepts]: Start accepts. Automaton has 29487 states and 41495 transitions. Word has length 160 [2022-11-03 03:00:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:00:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 29487 states and 41495 transitions. [2022-11-03 03:00:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:00:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 29487 states and 41495 transitions. [2022-11-03 03:00:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:00:43,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:00:43,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:00:43,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:00:43,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-03 03:00:43,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-03 03:00:43,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:00:43,674 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:00:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:00:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 806333961, now seen corresponding path program 1 times [2022-11-03 03:00:43,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:00:43,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684321679] [2022-11-03 03:00:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:00:43,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:00:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:00:43,678 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:00:43,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:00:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 03:00:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:00:48,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:01:00,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684321679] [2022-11-03 03:01:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684321679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691677574] [2022-11-03 03:01:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:00,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:00,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:00,780 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:00,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 03:01:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 03:01:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:01:06,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:02:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691677574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045977394] [2022-11-03 03:02:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:12,914 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:12,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 03:02:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:02:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:02:17,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:02:28,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045977394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:28,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:28,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 03:02:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053633607] [2022-11-03 03:02:28,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:02:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:02:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1630, Unknown=27, NotChecked=0, Total=1892 [2022-11-03 03:02:28,389 INFO L87 Difference]: Start difference. First operand 29487 states and 41495 transitions. Second operand has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:37,793 INFO L93 Difference]: Finished difference Result 46967 states and 66445 transitions. [2022-11-03 03:02:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:02:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 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 [2022-11-03 03:02:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:37,829 INFO L225 Difference]: With dead ends: 46967 [2022-11-03 03:02:37,829 INFO L226 Difference]: Without dead ends: 46965 [2022-11-03 03:02:37,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 924 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=665, Invalid=4278, Unknown=27, NotChecked=0, Total=4970 [2022-11-03 03:02:37,838 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 2232 mSDsluCounter, 7046 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 7298 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:37,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2232 Valid, 7298 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 353 Unchecked, 0.1s Time] [2022-11-03 03:02:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46965 states. [2022-11-03 03:02:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46965 to 46468. [2022-11-03 03:02:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4172208233800332) internal successors, (65854), 46467 states have internal predecessors, (65854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65854 transitions. [2022-11-03 03:02:39,125 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65854 transitions. Word has length 160 [2022-11-03 03:02:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:39,125 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65854 transitions. [2022-11-03 03:02:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.727272727272727) internal successors, (780), 44 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65854 transitions. [2022-11-03 03:02:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:02:39,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:39,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:02:39,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 03:02:39,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-03 03:02:39,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 03:02:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:39,744 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 419456645, now seen corresponding path program 1 times [2022-11-03 03:02:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32975705] [2022-11-03 03:02:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:39,748 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:39,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 03:02:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:02:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:02:41,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:02:41,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32975705] [2022-11-03 03:02:41,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32975705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:02:41,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:02:41,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:02:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131622193] [2022-11-03 03:02:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:02:41,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:02:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:02:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:02:41,025 INFO L87 Difference]: Start difference. First operand 46468 states and 65854 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 03:02:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:43,025 INFO L93 Difference]: Finished difference Result 87762 states and 123805 transitions. [2022-11-03 03:02:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:02:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 03:02:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:43,079 INFO L225 Difference]: With dead ends: 87762 [2022-11-03 03:02:43,079 INFO L226 Difference]: Without dead ends: 81103 [2022-11-03 03:02:43,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:02:43,095 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 503 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:43,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1910 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-11-03 03:02:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81103 states. [2022-11-03 03:02:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81103 to 46468. [2022-11-03 03:02:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4165321626100242) internal successors, (65822), 46467 states have internal predecessors, (65822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65822 transitions. [2022-11-03 03:02:44,944 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65822 transitions. Word has length 160 [2022-11-03 03:02:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65822 transitions. [2022-11-03 03:02:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 03:02:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65822 transitions. [2022-11-03 03:02:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:02:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:44,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:02:44,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:45,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:45,192 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash -862715641, now seen corresponding path program 1 times [2022-11-03 03:02:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:45,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383713252] [2022-11-03 03:02:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:45,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:45,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:45,196 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:45,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 03:02:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:02:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:02:46,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:02:46,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383713252] [2022-11-03 03:02:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383713252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:02:46,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:02:46,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:02:46,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924214272] [2022-11-03 03:02:46,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:02:46,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:02:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:02:46,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:02:46,577 INFO L87 Difference]: Start difference. First operand 46468 states and 65822 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 03:02:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:48,716 INFO L93 Difference]: Finished difference Result 66436 states and 92751 transitions. [2022-11-03 03:02:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:02:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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 160 [2022-11-03 03:02:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:48,766 INFO L225 Difference]: With dead ends: 66436 [2022-11-03 03:02:48,766 INFO L226 Difference]: Without dead ends: 63329 [2022-11-03 03:02:48,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:02:48,777 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 270 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:48,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1616 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-11-03 03:02:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63329 states. [2022-11-03 03:02:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63329 to 46468. [2022-11-03 03:02:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 1.4154991714550111) internal successors, (65774), 46467 states have internal predecessors, (65774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:02:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 65774 transitions. [2022-11-03 03:02:50,571 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 65774 transitions. Word has length 160 [2022-11-03 03:02:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:50,571 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 65774 transitions. [2022-11-03 03:02:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 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) [2022-11-03 03:02:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 65774 transitions. [2022-11-03 03:02:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:02:50,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:50,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:02:50,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:50,804 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash -878234359, now seen corresponding path program 1 times [2022-11-03 03:02:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:50,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713560548] [2022-11-03 03:02:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:50,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:50,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:50,808 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:50,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:02:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:02:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:02:56,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:03:02,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:03:02,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713560548] [2022-11-03 03:03:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713560548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:02,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674041162] [2022-11-03 03:03:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:03:02,959 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:03:02,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:03:02,960 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:03:02,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1315a0-c829-4b36-ab24-a05502575f8d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 03:03:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:03:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:03:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:03:08,981 INFO L328 TraceCheckSpWp]: Computing backward predicates...