./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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 3f9c397d5aa1cb71d12753e83c412ed40b6f0435c493fbfb32e773ed4e1a0a10 --- 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 03:28:18,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:18,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:18,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:18,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:18,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:18,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:18,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:18,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:18,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:18,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:18,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:18,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:18,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:18,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:18,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:18,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:18,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:18,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:18,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:18,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:18,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:18,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:18,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:18,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:18,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:18,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:18,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:18,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:18,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:18,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:18,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:18,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:18,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:18,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:18,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:18,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:18,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:18,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:18,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:18,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:18,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:28:18,934 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:18,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:18,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:18,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:18,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:18,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:18,936 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:18,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:18,936 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:18,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:18,937 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:18,937 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:18,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:18,938 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:18,938 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:18,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:18,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:18,939 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:18,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:18,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:18,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:18,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:18,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:18,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:18,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:18,941 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:18,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:18,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:18,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:18,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:18,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:18,943 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:18,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:18,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:18,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:18,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:18,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:18,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:18,945 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f9c397d5aa1cb71d12753e83c412ed40b6f0435c493fbfb32e773ed4e1a0a10 [2022-11-03 03:28:19,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:19,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:19,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:19,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:19,251 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:19,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:19,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/9c01c2eec/ea0aee4f2d5649cdbd414f2f312a53c5/FLAG788f0d71e [2022-11-03 03:28:19,917 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:19,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:19,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/9c01c2eec/ea0aee4f2d5649cdbd414f2f312a53c5/FLAG788f0d71e [2022-11-03 03:28:20,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/9c01c2eec/ea0aee4f2d5649cdbd414f2f312a53c5 [2022-11-03 03:28:20,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:20,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:20,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:20,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:20,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:20,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cede2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20, skipping insertion in model container [2022-11-03 03:28:20,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:20,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:20,469 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c[1107,1120] [2022-11-03 03:28:20,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:20,650 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:20,671 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c[1107,1120] [2022-11-03 03:28:20,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:20,798 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:20,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20 WrapperNode [2022-11-03 03:28:20,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:20,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:20,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:20,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:20,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,912 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 669 [2022-11-03 03:28:20,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:20,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:20,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:20,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:20,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:20,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:21,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:21,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:21,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:21,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (1/1) ... [2022-11-03 03:28:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:21,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:21,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:21,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:21,456 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:21,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:45,080 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:46,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:46,606 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:28:46,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:46 BoogieIcfgContainer [2022-11-03 03:28:46,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:46,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:46,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:46,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:46,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:20" (1/3) ... [2022-11-03 03:28:46,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1e1483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:46, skipping insertion in model container [2022-11-03 03:28:46,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:20" (2/3) ... [2022-11-03 03:28:46,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1e1483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:46, skipping insertion in model container [2022-11-03 03:28:46,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:46" (3/3) ... [2022-11-03 03:28:46,620 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:46,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:46,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:46,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:46,726 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;@613c7c9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:46,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:46,730 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 03:28:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:28:46,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:46,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:28:46,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2661427, now seen corresponding path program 1 times [2022-11-03 03:28:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:46,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784114292] [2022-11-03 03:28:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:46,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:28:47,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:28:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:28:47,325 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:28:47,328 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:28:47,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:28:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:28:47,335 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:28:47,339 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:28:47,359 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:28:47,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:28:47 BoogieIcfgContainer [2022-11-03 03:28:47,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:28:47,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:28:47,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:28:47,369 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:28:47,369 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:46" (3/4) ... [2022-11-03 03:28:47,373 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:28:47,373 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:28:47,374 INFO L158 Benchmark]: Toolchain (without parser) took 27143.07ms. Allocated memory was 107.0MB in the beginning and 406.8MB in the end (delta: 299.9MB). Free memory was 68.1MB in the beginning and 279.1MB in the end (delta: -211.0MB). Peak memory consumption was 89.3MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,375 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:28:47,375 INFO L158 Benchmark]: CACSL2BoogieTranslator took 557.23ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 65.1MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,376 INFO L158 Benchmark]: Boogie Procedure Inliner took 112.28ms. Allocated memory is still 107.0MB. Free memory was 65.1MB in the beginning and 51.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,377 INFO L158 Benchmark]: Boogie Preprocessor took 150.55ms. Allocated memory is still 107.0MB. Free memory was 51.6MB in the beginning and 44.8MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,377 INFO L158 Benchmark]: RCFGBuilder took 25544.63ms. Allocated memory was 107.0MB in the beginning and 406.8MB in the end (delta: 299.9MB). Free memory was 44.8MB in the beginning and 318.0MB in the end (delta: -273.2MB). Peak memory consumption was 221.4MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,378 INFO L158 Benchmark]: TraceAbstraction took 755.68ms. Allocated memory is still 406.8MB. Free memory was 316.9MB in the beginning and 279.1MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-03 03:28:47,378 INFO L158 Benchmark]: Witness Printer took 4.92ms. Allocated memory is still 406.8MB. Free memory is still 279.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:28:47,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 557.23ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 65.1MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 112.28ms. Allocated memory is still 107.0MB. Free memory was 65.1MB in the beginning and 51.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 150.55ms. Allocated memory is still 107.0MB. Free memory was 51.6MB in the beginning and 44.8MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 25544.63ms. Allocated memory was 107.0MB in the beginning and 406.8MB in the end (delta: 299.9MB). Free memory was 44.8MB in the beginning and 318.0MB in the end (delta: -273.2MB). Peak memory consumption was 221.4MB. Max. memory is 16.1GB. * TraceAbstraction took 755.68ms. Allocated memory is still 406.8MB. Free memory was 316.9MB in the beginning and 279.1MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Witness Printer took 4.92ms. Allocated memory is still 406.8MB. Free memory is still 279.1MB. 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 155, overapproximation of bitwiseAnd at line 140. 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_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 8); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (8 - 1); [L31] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 32); [L32] const SORT_9 msb_SORT_9 = (SORT_9)1 << (32 - 1); [L34] const SORT_161 mask_SORT_161 = (SORT_161)-1 >> (sizeof(SORT_161) * 8 - 2); [L35] const SORT_161 msb_SORT_161 = (SORT_161)1 << (2 - 1); [L37] const SORT_163 mask_SORT_163 = (SORT_163)-1 >> (sizeof(SORT_163) * 8 - 3); [L38] const SORT_163 msb_SORT_163 = (SORT_163)1 << (3 - 1); [L40] const SORT_165 mask_SORT_165 = (SORT_165)-1 >> (sizeof(SORT_165) * 8 - 4); [L41] const SORT_165 msb_SORT_165 = (SORT_165)1 << (4 - 1); [L43] const SORT_167 mask_SORT_167 = (SORT_167)-1 >> (sizeof(SORT_167) * 8 - 5); [L44] const SORT_167 msb_SORT_167 = (SORT_167)1 << (5 - 1); [L46] const SORT_169 mask_SORT_169 = (SORT_169)-1 >> (sizeof(SORT_169) * 8 - 6); [L47] const SORT_169 msb_SORT_169 = (SORT_169)1 << (6 - 1); [L49] const SORT_171 mask_SORT_171 = (SORT_171)-1 >> (sizeof(SORT_171) * 8 - 7); [L50] const SORT_171 msb_SORT_171 = (SORT_171)1 << (7 - 1); [L52] const SORT_174 mask_SORT_174 = (SORT_174)-1 >> (sizeof(SORT_174) * 8 - 9); [L53] const SORT_174 msb_SORT_174 = (SORT_174)1 << (9 - 1); [L55] const SORT_176 mask_SORT_176 = (SORT_176)-1 >> (sizeof(SORT_176) * 8 - 10); [L56] const SORT_176 msb_SORT_176 = (SORT_176)1 << (10 - 1); [L58] const SORT_178 mask_SORT_178 = (SORT_178)-1 >> (sizeof(SORT_178) * 8 - 11); [L59] const SORT_178 msb_SORT_178 = (SORT_178)1 << (11 - 1); [L61] const SORT_180 mask_SORT_180 = (SORT_180)-1 >> (sizeof(SORT_180) * 8 - 12); [L62] const SORT_180 msb_SORT_180 = (SORT_180)1 << (12 - 1); [L64] const SORT_182 mask_SORT_182 = (SORT_182)-1 >> (sizeof(SORT_182) * 8 - 13); [L65] const SORT_182 msb_SORT_182 = (SORT_182)1 << (13 - 1); [L67] const SORT_184 mask_SORT_184 = (SORT_184)-1 >> (sizeof(SORT_184) * 8 - 14); [L68] const SORT_184 msb_SORT_184 = (SORT_184)1 << (14 - 1); [L70] const SORT_186 mask_SORT_186 = (SORT_186)-1 >> (sizeof(SORT_186) * 8 - 15); [L71] const SORT_186 msb_SORT_186 = (SORT_186)1 << (15 - 1); [L73] const SORT_188 mask_SORT_188 = (SORT_188)-1 >> (sizeof(SORT_188) * 8 - 16); [L74] const SORT_188 msb_SORT_188 = (SORT_188)1 << (16 - 1); [L76] const SORT_190 mask_SORT_190 = (SORT_190)-1 >> (sizeof(SORT_190) * 8 - 17); [L77] const SORT_190 msb_SORT_190 = (SORT_190)1 << (17 - 1); [L79] const SORT_192 mask_SORT_192 = (SORT_192)-1 >> (sizeof(SORT_192) * 8 - 18); [L80] const SORT_192 msb_SORT_192 = (SORT_192)1 << (18 - 1); [L82] const SORT_194 mask_SORT_194 = (SORT_194)-1 >> (sizeof(SORT_194) * 8 - 19); [L83] const SORT_194 msb_SORT_194 = (SORT_194)1 << (19 - 1); [L85] const SORT_196 mask_SORT_196 = (SORT_196)-1 >> (sizeof(SORT_196) * 8 - 20); [L86] const SORT_196 msb_SORT_196 = (SORT_196)1 << (20 - 1); [L88] const SORT_198 mask_SORT_198 = (SORT_198)-1 >> (sizeof(SORT_198) * 8 - 21); [L89] const SORT_198 msb_SORT_198 = (SORT_198)1 << (21 - 1); [L91] const SORT_200 mask_SORT_200 = (SORT_200)-1 >> (sizeof(SORT_200) * 8 - 22); [L92] const SORT_200 msb_SORT_200 = (SORT_200)1 << (22 - 1); [L94] const SORT_202 mask_SORT_202 = (SORT_202)-1 >> (sizeof(SORT_202) * 8 - 23); [L95] const SORT_202 msb_SORT_202 = (SORT_202)1 << (23 - 1); [L97] const SORT_204 mask_SORT_204 = (SORT_204)-1 >> (sizeof(SORT_204) * 8 - 24); [L98] const SORT_204 msb_SORT_204 = (SORT_204)1 << (24 - 1); [L100] const SORT_206 mask_SORT_206 = (SORT_206)-1 >> (sizeof(SORT_206) * 8 - 25); [L101] const SORT_206 msb_SORT_206 = (SORT_206)1 << (25 - 1); [L103] const SORT_208 mask_SORT_208 = (SORT_208)-1 >> (sizeof(SORT_208) * 8 - 26); [L104] const SORT_208 msb_SORT_208 = (SORT_208)1 << (26 - 1); [L106] const SORT_210 mask_SORT_210 = (SORT_210)-1 >> (sizeof(SORT_210) * 8 - 27); [L107] const SORT_210 msb_SORT_210 = (SORT_210)1 << (27 - 1); [L109] const SORT_212 mask_SORT_212 = (SORT_212)-1 >> (sizeof(SORT_212) * 8 - 28); [L110] const SORT_212 msb_SORT_212 = (SORT_212)1 << (28 - 1); [L112] const SORT_214 mask_SORT_214 = (SORT_214)-1 >> (sizeof(SORT_214) * 8 - 29); [L113] const SORT_214 msb_SORT_214 = (SORT_214)1 << (29 - 1); [L115] const SORT_216 mask_SORT_216 = (SORT_216)-1 >> (sizeof(SORT_216) * 8 - 30); [L116] const SORT_216 msb_SORT_216 = (SORT_216)1 << (30 - 1); [L118] const SORT_218 mask_SORT_218 = (SORT_218)-1 >> (sizeof(SORT_218) * 8 - 31); [L119] const SORT_218 msb_SORT_218 = (SORT_218)1 << (31 - 1); [L121] const SORT_9 var_10 = 4294967295; [L122] const SORT_9 var_13 = 2863311530; [L123] const SORT_1 var_17 = 1; [L125] SORT_1 input_2; [L126] SORT_1 input_3; [L127] SORT_1 input_4; [L128] SORT_5 input_6; [L129] SORT_1 input_7; [L130] SORT_1 input_8; [L132] SORT_9 state_11 = __VERIFIER_nondet_uint() & mask_SORT_9; [L134] SORT_9 init_12_arg_1 = var_10; [L135] state_11 = init_12_arg_1 VAL [init_12_arg_1=4294967295, mask_SORT_1=1, mask_SORT_161=3, mask_SORT_163=7, mask_SORT_165=15, mask_SORT_167=31, mask_SORT_169=63, mask_SORT_171=127, mask_SORT_174=511, mask_SORT_176=1023, mask_SORT_178=2047, mask_SORT_180=4095, mask_SORT_182=8191, mask_SORT_184=16383, mask_SORT_186=32767, mask_SORT_188=65535, mask_SORT_190=4294967295, mask_SORT_192=4294967295, mask_SORT_194=4294967295, mask_SORT_196=4294967295, mask_SORT_198=4294967295, mask_SORT_200=4294967295, mask_SORT_202=4294967295, mask_SORT_204=4294967295, mask_SORT_206=4294967295, mask_SORT_208=4294967295, mask_SORT_210=4294967295, mask_SORT_212=4294967295, mask_SORT_214=4294967295, mask_SORT_216=4294967295, mask_SORT_218=4294967295, mask_SORT_5=255, mask_SORT_9=4294967295, msb_SORT_1=1, msb_SORT_161=2, msb_SORT_163=4, msb_SORT_165=8, msb_SORT_167=16, msb_SORT_169=32, msb_SORT_171=64, msb_SORT_174=256, msb_SORT_176=512, msb_SORT_178=1024, msb_SORT_180=2048, msb_SORT_182=4096, msb_SORT_184=8192, msb_SORT_186=16384, msb_SORT_188=32768, msb_SORT_190=65536, msb_SORT_192=131072, msb_SORT_194=262144, msb_SORT_196=524288, msb_SORT_198=1048576, msb_SORT_200=2097152, msb_SORT_202=4194304, msb_SORT_204=8388608, msb_SORT_206=16777216, msb_SORT_208=33554432, msb_SORT_210=67108864, msb_SORT_212=134217728, msb_SORT_214=268435456, msb_SORT_216=536870912, msb_SORT_218=1073741824, msb_SORT_5=128, msb_SORT_9=2147483648, state_11=4294967295, var_10=4294967295, var_13=2863311530, var_17=1] [L138] input_2 = __VERIFIER_nondet_uchar() [L139] input_3 = __VERIFIER_nondet_uchar() [L140] input_3 = input_3 & mask_SORT_1 [L141] input_4 = __VERIFIER_nondet_uchar() [L142] input_4 = input_4 & mask_SORT_1 [L143] input_6 = __VERIFIER_nondet_uchar() [L144] input_6 = input_6 & mask_SORT_5 [L145] input_7 = __VERIFIER_nondet_uchar() [L146] input_7 = input_7 & mask_SORT_1 [L147] input_8 = __VERIFIER_nondet_uchar() [L148] input_8 = input_8 & mask_SORT_1 [L151] SORT_9 var_14_arg_0 = state_11; [L152] SORT_9 var_14_arg_1 = var_13; [L153] SORT_1 var_14 = var_14_arg_0 != var_14_arg_1; [L154] SORT_1 var_18_arg_0 = var_14; [L155] SORT_1 var_18 = ~var_18_arg_0; [L156] SORT_1 var_19_arg_0 = var_17; [L157] SORT_1 var_19_arg_1 = var_18; [L158] SORT_1 var_19 = var_19_arg_0 & var_19_arg_1; [L159] var_19 = var_19 & mask_SORT_1 [L160] SORT_1 bad_20_arg_0 = var_19; [L161] CALL __VERIFIER_assert(!(bad_20_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: 0.6s, 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, 0.3s 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 03:28:47,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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 3f9c397d5aa1cb71d12753e83c412ed40b6f0435c493fbfb32e773ed4e1a0a10 --- 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 03:28:49,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:49,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:49,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:49,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:49,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:49,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:49,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:49,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:49,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:49,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:49,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:49,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:49,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:49,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:49,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:49,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:49,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:49,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:49,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:49,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:49,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:49,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:49,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:49,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:49,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:49,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:49,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:49,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:49,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:49,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:49,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:49,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:49,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:49,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:49,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:49,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:49,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:49,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:49,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:49,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:49,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:28:49,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:49,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:49,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:49,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:49,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:49,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:49,723 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:49,723 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:49,723 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:49,723 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:49,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:49,724 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:49,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:49,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:49,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:49,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:49,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:49,725 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:28:49,726 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:28:49,726 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:28:49,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:49,726 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:49,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:49,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:49,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:28:49,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:49,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:49,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:49,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:49,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:49,728 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:28:49,728 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:28:49,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:49,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:49,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:28:49,729 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f9c397d5aa1cb71d12753e83c412ed40b6f0435c493fbfb32e773ed4e1a0a10 [2022-11-03 03:28:50,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:50,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:50,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:50,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:50,073 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:50,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:50,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/61adabe75/7a34de84b7c044b1954174b52b9baafe/FLAG5a6b4adaa [2022-11-03 03:28:50,790 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:50,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:50,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/61adabe75/7a34de84b7c044b1954174b52b9baafe/FLAG5a6b4adaa [2022-11-03 03:28:51,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/data/61adabe75/7a34de84b7c044b1954174b52b9baafe [2022-11-03 03:28:51,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:51,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:51,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:51,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:51,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:51,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b06a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51, skipping insertion in model container [2022-11-03 03:28:51,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:51,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:51,359 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c[1107,1120] [2022-11-03 03:28:51,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:51,684 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:51,697 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_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_CRC.c[1107,1120] [2022-11-03 03:28:51,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:51,839 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:51,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51 WrapperNode [2022-11-03 03:28:51,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:51,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:51,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:51,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:51,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,964 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 669 [2022-11-03 03:28:51,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:51,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:51,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:51,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:51,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:51,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:52,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:52,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:52,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:52,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:52,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:52,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:52,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:52,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (1/1) ... [2022-11-03 03:28:52,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:52,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:52,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:52,399 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:52,413 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:53,236 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:53,246 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:53,247 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:28:53,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:53 BoogieIcfgContainer [2022-11-03 03:28:53,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:53,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:53,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:53,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:53,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:51" (1/3) ... [2022-11-03 03:28:53,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443e6f7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:53, skipping insertion in model container [2022-11-03 03:28:53,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:51" (2/3) ... [2022-11-03 03:28:53,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443e6f7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:53, skipping insertion in model container [2022-11-03 03:28:53,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:53" (3/3) ... [2022-11-03 03:28:53,259 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_CRC.c [2022-11-03 03:28:53,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:53,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:53,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:53,361 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;@829b70a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:53,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:28:53,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:53,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:28:53,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:28:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140108534] [2022-11-03 03:28:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:53,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:53,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:53,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:28:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:28:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:53,871 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 03:28:53,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:53,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140108534] [2022-11-03 03:28:53,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140108534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:53,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:53,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:53,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009709764] [2022-11-03 03:28:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:53,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:53,930 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:28:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:54,102 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2022-11-03 03:28:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:28:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:28:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:54,113 INFO L225 Difference]: With dead ends: 44 [2022-11-03 03:28:54,114 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 03:28:54,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:54,123 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:54,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 03:28:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-03 03:28:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 03:28:54,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 5 [2022-11-03 03:28:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:54,165 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 03:28:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:28:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 03:28:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:28:54,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:54,167 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:54,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:54,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1667101803, now seen corresponding path program 1 times [2022-11-03 03:28:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:54,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315708178] [2022-11-03 03:28:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:54,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:54,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:54,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:54,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:28:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:28:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:55,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:56,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:56,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315708178] [2022-11-03 03:28:56,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315708178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778355163] [2022-11-03 03:28:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:28:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:28:56,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:28:56,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 03:28:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:28:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:56,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:57,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778355163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172975746] [2022-11-03 03:28:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:57,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:57,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:57,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:28:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:28:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:58,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172975746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:58,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:28:58,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 18 [2022-11-03 03:28:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662629425] [2022-11-03 03:28:58,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:28:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:28:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:28:58,105 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:58,999 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2022-11-03 03:28:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:28:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:28:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:59,001 INFO L225 Difference]: With dead ends: 64 [2022-11-03 03:28:59,001 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:28:59,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:28:59,003 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 176 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:59,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 202 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 61 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-11-03 03:28:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:28:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 28. [2022-11-03 03:28:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-11-03 03:28:59,011 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2022-11-03 03:28:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:59,011 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-11-03 03:28:59,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-11-03 03:28:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:28:59,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:59,013 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:59,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:59,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:59,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:59,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:28:59,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1665254761, now seen corresponding path program 1 times [2022-11-03 03:28:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011199142] [2022-11-03 03:28:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:59,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:59,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:59,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:29:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:29:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:00,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:00,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011199142] [2022-11-03 03:29:00,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011199142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:00,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1026269812] [2022-11-03 03:29:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:00,705 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:00,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:00,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 03:29:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:29:01,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:01,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:01,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1026269812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534702524] [2022-11-03 03:29:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:01,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:01,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:29:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:02,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534702524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:02,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:29:02,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2022-11-03 03:29:02,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104365710] [2022-11-03 03:29:02,585 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:02,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:29:02,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:29:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:29:02,587 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:03,023 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-11-03 03:29:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:29:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:03,025 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:29:03,025 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 03:29:03,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:29:03,027 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:03,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 183 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-03 03:29:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 03:29:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-11-03 03:29:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 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 03:29:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-11-03 03:29:03,036 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 16 [2022-11-03 03:29:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:03,036 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-11-03 03:29:03,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-11-03 03:29:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:29:03,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:03,038 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:03,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:03,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:03,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 03:29:03,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:03,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash 107905559, now seen corresponding path program 1 times [2022-11-03 03:29:03,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:03,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88783060] [2022-11-03 03:29:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:03,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:03,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:29:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-03 03:29:04,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:59,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:13,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88783060] [2022-11-03 03:31:13,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88783060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002208459] [2022-11-03 03:31:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:13,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:13,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 03:31:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-03 03:31:14,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:14,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:22,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002208459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038387950] [2022-11-03 03:31:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:22,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:22,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:22,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:22,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:31:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 03:31:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:24,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038387950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:44,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:31:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 28 [2022-11-03 03:31:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149757462] [2022-11-03 03:31:44,862 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:31:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:31:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=631, Unknown=48, NotChecked=0, Total=756 [2022-11-03 03:31:44,864 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:46,084 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2022-11-03 03:31:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:31:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:31:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:46,089 INFO L225 Difference]: With dead ends: 86 [2022-11-03 03:31:46,089 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 03:31:46,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 157.5s TimeCoverageRelationStatistics Valid=112, Invalid=770, Unknown=48, NotChecked=0, Total=930 [2022-11-03 03:31:46,090 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:46,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 516 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2022-11-03 03:31:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 03:31:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2022-11-03 03:31:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 03:31:46,101 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 16 [2022-11-03 03:31:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 03:31:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 03:31:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:31:46,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:46,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:46,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:46,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:46,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:46,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:46,705 INFO L85 PathProgramCache]: Analyzing trace with hash -572152811, now seen corresponding path program 1 times [2022-11-03 03:31:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:46,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906843235] [2022-11-03 03:31:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:46,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:46,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:46,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:31:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:31:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:47,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:48,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906843235] [2022-11-03 03:31:48,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906843235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037688196] [2022-11-03 03:31:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:48,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:48,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:48,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:48,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 03:31:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:31:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:49,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037688196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621472322] [2022-11-03 03:31:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:49,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:49,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:31:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:31:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:49,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:50,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621472322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:50,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:31:50,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 03:31:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285371860] [2022-11-03 03:31:50,428 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:50,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:31:50,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:31:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:31:50,430 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:50,721 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-03 03:31:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:31:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:31:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:50,723 INFO L225 Difference]: With dead ends: 64 [2022-11-03 03:31:50,723 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:31:50,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:31:50,724 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:50,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 215 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-11-03 03:31:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:31:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2022-11-03 03:31:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 03:31:50,733 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 16 [2022-11-03 03:31:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:50,733 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 03:31:50,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 03:31:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:31:50,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:50,735 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:50,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-03 03:31:50,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:51,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:51,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash 808970137, now seen corresponding path program 1 times [2022-11-03 03:31:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:51,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523522706] [2022-11-03 03:31:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:51,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:51,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:51,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:31:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:31:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:52,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:53,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:53,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523522706] [2022-11-03 03:31:53,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523522706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:53,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786809766] [2022-11-03 03:31:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:53,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:53,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:53,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 03:31:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:31:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:53,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:53,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786809766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666659866] [2022-11-03 03:31:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:53,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:53,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:53,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:54,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:31:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:31:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:54,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666659866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:54,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:31:54,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 26 [2022-11-03 03:31:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313102628] [2022-11-03 03:31:54,840 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:31:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:31:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:31:54,842 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:56,575 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2022-11-03 03:31:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:31:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:31:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:56,577 INFO L225 Difference]: With dead ends: 120 [2022-11-03 03:31:56,577 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 03:31:56,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=413, Invalid=1567, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:31:56,579 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:56,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 449 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 242 Unchecked, 0.6s Time] [2022-11-03 03:31:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 03:31:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 56. [2022-11-03 03:31:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 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 03:31:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2022-11-03 03:31:56,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 16 [2022-11-03 03:31:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:56,602 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2022-11-03 03:31:56,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2022-11-03 03:31:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:31:56,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:56,603 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 03:31:56,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:56,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:57,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:57,209 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash -601503479, now seen corresponding path program 2 times [2022-11-03 03:31:57,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:57,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707054850] [2022-11-03 03:31:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:31:57,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:57,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:57,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:57,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:31:57,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:31:57,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:31:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:58,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707054850] [2022-11-03 03:31:58,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707054850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:58,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768188251] [2022-11-03 03:31:58,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:31:58,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:58,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:58,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:58,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 03:31:59,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:31:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:59,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:31:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:31:59,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:00,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768188251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053990531] [2022-11-03 03:32:00,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:32:00,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:00,118 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:00,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:32:00,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:32:00,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:32:00,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:32:01,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:32:01,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053990531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:01,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:32:01,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 15, 10] total 23 [2022-11-03 03:32:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379899732] [2022-11-03 03:32:01,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:01,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:32:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:32:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:32:01,464 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 03:32:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:02,225 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2022-11-03 03:32:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:32:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:32:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:02,227 INFO L225 Difference]: With dead ends: 90 [2022-11-03 03:32:02,227 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 03:32:02,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:32:02,228 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:02,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 68 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-03 03:32:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 03:32:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2022-11-03 03:32:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2022-11-03 03:32:02,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 27 [2022-11-03 03:32:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:02,243 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2022-11-03 03:32:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 03:32:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2022-11-03 03:32:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:32:02,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:02,245 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:02,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:02,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:02,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-03 03:32:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:02,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -599656437, now seen corresponding path program 1 times [2022-11-03 03:32:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:02,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086035114] [2022-11-03 03:32:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:02,862 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:02,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:32:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:32:03,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:04,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086035114] [2022-11-03 03:32:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086035114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690620836] [2022-11-03 03:32:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:04,665 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 03:32:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:32:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:05,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:06,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690620836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:06,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413569908] [2022-11-03 03:32:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:06,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:06,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:06,183 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:06,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 03:32:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:06,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:32:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:06,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:07,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413569908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:07,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:32:07,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 03:32:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748890029] [2022-11-03 03:32:07,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:32:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:32:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:32:07,340 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:09,040 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-11-03 03:32:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:32:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:32:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:09,042 INFO L225 Difference]: With dead ends: 148 [2022-11-03 03:32:09,042 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 03:32:09,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 03:32:09,044 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 279 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:09,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 215 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 122 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2022-11-03 03:32:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 03:32:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 60. [2022-11-03 03:32:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-11-03 03:32:09,056 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 27 [2022-11-03 03:32:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:09,056 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-11-03 03:32:09,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-11-03 03:32:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:32:09,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:09,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:09,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:09,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:09,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:09,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1173503883, now seen corresponding path program 1 times [2022-11-03 03:32:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:09,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888933112] [2022-11-03 03:32:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:09,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:09,677 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:09,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:32:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-03 03:32:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:46,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888933112] [2022-11-03 03:33:46,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888933112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1392713380] [2022-11-03 03:33:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:46,121 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:46,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 03:33:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-03 03:33:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:48,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1392713380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264034458] [2022-11-03 03:36:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:33,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:33,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:33,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 03:36:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-03 03:36:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:36,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:28,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264034458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:28,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:40:28,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 19, 19] total 48 [2022-11-03 03:40:28,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836747545] [2022-11-03 03:40:28,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:40:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:40:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1940, Unknown=180, NotChecked=0, Total=2256 [2022-11-03 03:40:28,306 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:01,938 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2022-11-03 03:41:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 03:41:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:41:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:01,940 INFO L225 Difference]: With dead ends: 103 [2022-11-03 03:41:01,940 INFO L226 Difference]: Without dead ends: 101 [2022-11-03 03:41:01,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 522.0s TimeCoverageRelationStatistics Valid=278, Invalid=3080, Unknown=182, NotChecked=0, Total=3540 [2022-11-03 03:41:01,942 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:01,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 356 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 464 Unchecked, 0.2s Time] [2022-11-03 03:41:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-03 03:41:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2022-11-03 03:41:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 70 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-11-03 03:41:01,955 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 27 [2022-11-03 03:41:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-11-03 03:41:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-11-03 03:41:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:41:01,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:01,957 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:01,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:41:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:02,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-03 03:41:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:02,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash 493445513, now seen corresponding path program 1 times [2022-11-03 03:41:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617541770] [2022-11-03 03:41:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:02,577 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:02,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:41:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:03,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:41:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:03,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:06,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617541770] [2022-11-03 03:41:06,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617541770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633801142] [2022-11-03 03:41:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:06,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:06,145 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:06,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 03:41:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:06,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:41:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:07,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:07,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1633801142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:07,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710432496] [2022-11-03 03:41:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:07,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:07,809 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:07,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 03:41:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:41:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:08,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:09,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710432496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:09,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:41:09,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 18, 18] total 34 [2022-11-03 03:41:09,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561423614] [2022-11-03 03:41:09,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:09,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:41:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:09,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:41:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:41:09,286 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:12,310 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2022-11-03 03:41:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 03:41:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:41:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:12,311 INFO L225 Difference]: With dead ends: 107 [2022-11-03 03:41:12,311 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 03:41:12,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:41:12,314 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:12,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 226 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 330 Unchecked, 0.1s Time] [2022-11-03 03:41:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 03:41:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-11-03 03:41:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 92 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2022-11-03 03:41:12,330 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 27 [2022-11-03 03:41:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2022-11-03 03:41:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2022-11-03 03:41:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:41:12,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:12,332 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:12,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 03:41:12,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-03 03:41:12,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:12,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:12,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:12,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1874568461, now seen corresponding path program 1 times [2022-11-03 03:41:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843083752] [2022-11-03 03:41:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:12,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:12,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:12,945 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:12,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:41:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:41:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:14,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:15,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843083752] [2022-11-03 03:41:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843083752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988521614] [2022-11-03 03:41:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:15,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:15,814 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:15,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 03:41:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:41:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:16,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:17,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988521614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:17,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234564768] [2022-11-03 03:41:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:17,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:17,412 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 03:41:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:41:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:18,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:41:18,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234564768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:18,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:41:18,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 16, 16] total 30 [2022-11-03 03:41:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886341275] [2022-11-03 03:41:18,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:41:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:41:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:41:18,724 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:22,013 INFO L93 Difference]: Finished difference Result 229 states and 297 transitions. [2022-11-03 03:41:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:41:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:41:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:22,015 INFO L225 Difference]: With dead ends: 229 [2022-11-03 03:41:22,015 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 03:41:22,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=826, Invalid=2834, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 03:41:22,017 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:22,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 349 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 162 Invalid, 0 Unknown, 312 Unchecked, 0.6s Time] [2022-11-03 03:41:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 03:41:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 97. [2022-11-03 03:41:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.375) internal successors, (132), 96 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2022-11-03 03:41:22,035 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 27 [2022-11-03 03:41:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:22,036 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2022-11-03 03:41:22,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2022-11-03 03:41:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:41:22,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:22,037 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:22,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:22,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-03 03:41:22,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 03:41:22,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:22,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash 152435529, now seen corresponding path program 1 times [2022-11-03 03:41:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:22,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615539245] [2022-11-03 03:41:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:22,649 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:22,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec446a84-c2b8-44cd-aa2f-c08a9a1ca26d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:41:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-03 03:41:23,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:43:11,173 INFO L328 TraceCheckSpWp]: Computing backward predicates...