./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:38:54,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:38:54,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:38:54,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:38:54,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:38:54,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:38:54,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:38:54,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:38:54,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:38:54,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:38:54,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:38:54,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:38:54,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:38:54,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:38:54,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:38:54,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:38:54,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:38:54,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:38:54,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:38:54,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:38:54,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:38:54,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:38:54,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:38:54,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:38:54,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:38:54,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:38:54,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:38:54,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:38:54,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:38:54,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:38:54,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:38:54,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:38:54,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:38:54,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:38:54,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:38:54,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:38:54,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:38:54,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:38:54,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:38:54,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:38:54,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:38:54,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:38:54,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:38:54,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:38:54,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:38:54,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:38:54,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:38:54,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:38:54,943 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:38:54,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:38:54,944 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:38:54,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:38:54,944 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:38:54,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:38:54,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:38:54,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:38:54,945 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:38:54,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:38:54,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:38:54,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:38:54,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:38:54,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:38:54,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:38:54,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:38:54,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:38:54,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:38:54,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:38:54,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:38:54,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:38:54,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:38:54,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:38:54,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:38:54,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:38:54,950 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:38:54,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:38:54,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:38:54,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:38:54,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:38:54,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:38:54,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:38:54,952 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced [2022-11-03 02:38:55,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:38:55,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:38:55,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:38:55,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:38:55,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:38:55,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:38:55,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/6954e5745/67127e3ce2ed44f990b995c24bc8e77c/FLAG962fc84f9 [2022-11-03 02:38:55,905 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:38:55,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:38:55,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/6954e5745/67127e3ce2ed44f990b995c24bc8e77c/FLAG962fc84f9 [2022-11-03 02:38:56,219 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/6954e5745/67127e3ce2ed44f990b995c24bc8e77c [2022-11-03 02:38:56,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:38:56,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:38:56,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:38:56,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:38:56,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:38:56,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22502b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56, skipping insertion in model container [2022-11-03 02:38:56,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:38:56,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:38:56,458 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-03 02:38:56,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:38:56,614 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:38:56,627 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-03 02:38:56,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:38:56,767 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:38:56,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56 WrapperNode [2022-11-03 02:38:56,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:38:56,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:38:56,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:38:56,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:38:56,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,874 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 604 [2022-11-03 02:38:56,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:38:56,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:38:56,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:38:56,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:38:56,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:38:56,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:38:56,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:38:56,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:38:56,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (1/1) ... [2022-11-03 02:38:56,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:38:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:57,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:38:57,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:38:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:38:57,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:38:57,290 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:38:57,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:38:58,017 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:38:58,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:38:58,791 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:38:58,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:38:58 BoogieIcfgContainer [2022-11-03 02:38:58,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:38:58,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:38:58,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:38:58,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:38:58,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:38:56" (1/3) ... [2022-11-03 02:38:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ed7228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:38:58, skipping insertion in model container [2022-11-03 02:38:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:38:56" (2/3) ... [2022-11-03 02:38:58,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ed7228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:38:58, skipping insertion in model container [2022-11-03 02:38:58,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:38:58" (3/3) ... [2022-11-03 02:38:58,806 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:38:58,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:38:58,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:38:58,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:38:58,903 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;@8b4fc46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:38:58,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:38:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:38:58,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:58,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:38:58,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash 10585833, now seen corresponding path program 1 times [2022-11-03 02:38:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084123691] [2022-11-03 02:38:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:38:59,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:38:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:38:59,521 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:38:59,531 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:38:59,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:38:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:38:59,541 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:38:59,547 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:38:59,583 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:38:59,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:38:59 BoogieIcfgContainer [2022-11-03 02:38:59,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:38:59,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:38:59,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:38:59,606 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:38:59,607 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:38:58" (3/4) ... [2022-11-03 02:38:59,611 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:38:59,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:38:59,616 INFO L158 Benchmark]: Toolchain (without parser) took 3390.35ms. Allocated memory was 92.3MB in the beginning and 155.2MB in the end (delta: 62.9MB). Free memory was 60.5MB in the beginning and 80.8MB in the end (delta: -20.3MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,617 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory is still 46.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:38:59,619 INFO L158 Benchmark]: CACSL2BoogieTranslator took 540.57ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 60.3MB in the beginning and 95.1MB in the end (delta: -34.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 106.34ms. Allocated memory is still 127.9MB. Free memory was 95.1MB in the beginning and 88.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,627 INFO L158 Benchmark]: Boogie Preprocessor took 55.66ms. Allocated memory is still 127.9MB. Free memory was 88.8MB in the beginning and 85.4MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,629 INFO L158 Benchmark]: RCFGBuilder took 1861.71ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 85.4MB in the beginning and 114.4MB in the end (delta: -28.9MB). Peak memory consumption was 55.6MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,630 INFO L158 Benchmark]: TraceAbstraction took 804.32ms. Allocated memory is still 155.2MB. Free memory was 113.3MB in the beginning and 80.8MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-03 02:38:59,631 INFO L158 Benchmark]: Witness Printer took 8.24ms. Allocated memory is still 155.2MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:38:59,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory is still 46.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 540.57ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 60.3MB in the beginning and 95.1MB in the end (delta: -34.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 106.34ms. Allocated memory is still 127.9MB. Free memory was 95.1MB in the beginning and 88.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.66ms. Allocated memory is still 127.9MB. Free memory was 88.8MB in the beginning and 85.4MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1861.71ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 85.4MB in the beginning and 114.4MB in the end (delta: -28.9MB). Peak memory consumption was 55.6MB. Max. memory is 16.1GB. * TraceAbstraction took 804.32ms. Allocated memory is still 155.2MB. Free memory was 113.3MB in the beginning and 80.8MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 8.24ms. Allocated memory is still 155.2MB. Free memory is still 80.8MB. 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 156, overapproximation of bitwiseOr at line 165, overapproximation of bitwiseAnd at line 150. 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_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 4); [L35] const SORT_32 msb_SORT_32 = (SORT_32)1 << (4 - 1); [L37] const SORT_68 mask_SORT_68 = (SORT_68)-1 >> (sizeof(SORT_68) * 8 - 10); [L38] const SORT_68 msb_SORT_68 = (SORT_68)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 1; [L42] const SORT_1 var_22 = 1; [L43] const SORT_68 var_69 = 0; [L44] const SORT_10 var_119 = 104; [L46] SORT_1 input_2; [L47] SORT_3 input_4; [L48] SORT_1 input_5; [L49] SORT_1 input_6; [L50] SORT_1 input_30; [L51] SORT_32 input_33; [L52] SORT_1 input_35; [L53] SORT_32 input_37; [L54] SORT_1 input_39; [L55] SORT_1 input_45; [L56] SORT_1 input_47; [L57] SORT_1 input_49; [L58] SORT_3 input_53; [L59] SORT_1 input_56; [L60] SORT_1 input_66; [L61] SORT_1 input_75; [L62] SORT_1 input_81; [L63] SORT_1 input_85; [L64] SORT_1 input_95; [L65] SORT_1 input_101; [L66] SORT_1 input_107; [L67] SORT_1 input_113; [L68] SORT_1 input_114; [L69] SORT_1 input_115; [L70] SORT_1 input_132; [L71] SORT_68 input_139; [L72] SORT_1 input_147; [L73] SORT_1 input_148; [L74] SORT_1 input_149; [L76] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_58 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_68 state_70 = __VERIFIER_nondet_ushort() & mask_SORT_68; [L88] SORT_1 state_72 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 init_9_arg_1 = var_7; [L91] state_8 = init_9_arg_1 [L92] SORT_1 init_16_arg_1 = var_7; [L93] state_15 = init_16_arg_1 [L94] SORT_1 init_27_arg_1 = var_7; [L95] state_26 = init_27_arg_1 [L96] SORT_1 init_29_arg_1 = var_7; [L97] state_28 = init_29_arg_1 [L98] SORT_1 init_42_arg_1 = var_7; [L99] state_41 = init_42_arg_1 [L100] SORT_1 init_44_arg_1 = var_7; [L101] state_43 = init_44_arg_1 [L102] SORT_1 init_52_arg_1 = var_22; [L103] state_51 = init_52_arg_1 [L104] SORT_1 init_59_arg_1 = var_7; [L105] state_58 = init_59_arg_1 [L106] SORT_1 init_61_arg_1 = var_7; [L107] state_60 = init_61_arg_1 [L108] SORT_1 init_63_arg_1 = var_7; [L109] state_62 = init_63_arg_1 [L110] SORT_1 init_65_arg_1 = var_7; [L111] state_64 = init_65_arg_1 [L112] SORT_68 init_71_arg_1 = var_69; [L113] state_70 = init_71_arg_1 [L114] SORT_1 init_73_arg_1 = var_7; [L115] state_72 = init_73_arg_1 VAL [init_16_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_52_arg_1=1, init_59_arg_1=0, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_71_arg_1=0, init_73_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_32=15, mask_SORT_68=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_32=8, msb_SORT_68=512, state_15=0, state_26=0, state_28=0, state_41=0, state_43=0, state_51=1, state_58=0, state_60=0, state_62=0, state_64=0, state_70=0, state_72=0, state_8=0, var_119=104, var_12=1, var_22=1, var_69=0, var_7=0] [L118] input_2 = __VERIFIER_nondet_uchar() [L119] input_4 = __VERIFIER_nondet_uchar() [L120] input_5 = __VERIFIER_nondet_uchar() [L121] input_6 = __VERIFIER_nondet_uchar() [L122] input_30 = __VERIFIER_nondet_uchar() [L123] input_33 = __VERIFIER_nondet_uchar() [L124] input_35 = __VERIFIER_nondet_uchar() [L125] input_37 = __VERIFIER_nondet_uchar() [L126] input_39 = __VERIFIER_nondet_uchar() [L127] input_45 = __VERIFIER_nondet_uchar() [L128] input_47 = __VERIFIER_nondet_uchar() [L129] input_49 = __VERIFIER_nondet_uchar() [L130] input_53 = __VERIFIER_nondet_uchar() [L131] input_56 = __VERIFIER_nondet_uchar() [L132] input_66 = __VERIFIER_nondet_uchar() [L133] input_75 = __VERIFIER_nondet_uchar() [L134] input_81 = __VERIFIER_nondet_uchar() [L135] input_85 = __VERIFIER_nondet_uchar() [L136] input_95 = __VERIFIER_nondet_uchar() [L137] input_101 = __VERIFIER_nondet_uchar() [L138] input_107 = __VERIFIER_nondet_uchar() [L139] input_113 = __VERIFIER_nondet_uchar() [L140] input_114 = __VERIFIER_nondet_uchar() [L141] input_115 = __VERIFIER_nondet_uchar() [L142] input_132 = __VERIFIER_nondet_uchar() [L143] input_139 = __VERIFIER_nondet_ushort() [L144] input_147 = __VERIFIER_nondet_uchar() [L145] input_148 = __VERIFIER_nondet_uchar() [L146] input_149 = __VERIFIER_nondet_uchar() [L149] SORT_1 var_11_arg_0 = state_8; [L150] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L151] SORT_10 var_11 = var_11_arg_0; [L152] SORT_10 var_13_arg_0 = var_11; [L153] SORT_10 var_13_arg_1 = var_12; [L154] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L155] SORT_1 var_14_arg_0 = var_13; [L156] SORT_1 var_14 = ~var_14_arg_0; [L157] SORT_1 var_17_arg_0 = state_15; [L158] var_17_arg_0 = var_17_arg_0 & mask_SORT_1 [L159] SORT_10 var_17 = var_17_arg_0; [L160] SORT_10 var_18_arg_0 = var_17; [L161] SORT_10 var_18_arg_1 = var_12; [L162] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L163] SORT_1 var_19_arg_0 = var_14; [L164] SORT_1 var_19_arg_1 = var_18; [L165] SORT_1 var_19 = var_19_arg_0 | var_19_arg_1; [L166] SORT_1 var_23_arg_0 = var_19; [L167] SORT_1 var_23 = ~var_23_arg_0; [L168] SORT_1 var_24_arg_0 = var_22; [L169] SORT_1 var_24_arg_1 = var_23; [L170] SORT_1 var_24 = var_24_arg_0 & var_24_arg_1; [L171] var_24 = var_24 & mask_SORT_1 [L172] SORT_1 bad_25_arg_0 = var_24; [L173] CALL __VERIFIER_assert(!(bad_25_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: 0.7s, 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 02:38:59,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:39:02,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:39:02,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:39:02,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:39:02,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:39:02,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:39:02,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:39:02,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:39:02,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:39:02,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:39:02,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:39:02,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:39:02,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:39:02,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:39:02,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:39:02,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:39:02,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:39:02,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:39:02,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:39:02,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:39:02,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:39:02,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:39:02,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:39:02,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:39:02,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:39:02,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:39:02,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:39:02,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:39:02,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:39:02,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:39:02,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:39:02,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:39:02,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:39:02,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:39:02,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:39:02,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:39:02,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:39:02,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:39:02,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:39:02,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:39:02,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:39:02,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:39:02,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:39:02,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:39:02,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:39:02,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:39:02,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:39:02,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:39:02,309 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:39:02,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:39:02,309 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:39:02,309 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:39:02,310 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:39:02,311 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:39:02,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:39:02,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:39:02,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:39:02,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:39:02,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:39:02,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:39:02,314 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:39:02,314 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:39:02,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:39:02,314 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:39:02,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:39:02,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:39:02,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:39:02,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:39:02,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:02,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:39:02,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:39:02,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:39:02,316 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:39:02,317 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:02,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:39:02,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:39:02,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:39:02,318 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced [2022-11-03 02:39:02,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:39:02,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:39:02,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:39:02,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:39:02,774 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:39:02,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:39:02,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/425c2b9e2/a4dda2c4d2b64cd6a10c9d0c28c29cb5/FLAG0b99cd94a [2022-11-03 02:39:03,398 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:39:03,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:39:03,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/425c2b9e2/a4dda2c4d2b64cd6a10c9d0c28c29cb5/FLAG0b99cd94a [2022-11-03 02:39:03,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/data/425c2b9e2/a4dda2c4d2b64cd6a10c9d0c28c29cb5 [2022-11-03 02:39:03,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:39:03,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:39:03,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:03,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:39:03,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:39:03,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:03" (1/1) ... [2022-11-03 02:39:03,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723349f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:03, skipping insertion in model container [2022-11-03 02:39:03,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:03" (1/1) ... [2022-11-03 02:39:03,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:39:03,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:39:04,028 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-03 02:39:04,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:04,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:39:04,298 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_9d8ce65a-e13b-449b-83fc-f7e0832768e1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-03 02:39:04,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:04,373 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:39:04,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04 WrapperNode [2022-11-03 02:39:04,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:04,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:04,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:39:04,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:39:04,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,465 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 604 [2022-11-03 02:39:04,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:04,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:39:04,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:39:04,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:39:04,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:39:04,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:39:04,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:39:04,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:39:04,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (1/1) ... [2022-11-03 02:39:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:04,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:39:04,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:39:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:39:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:39:04,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:39:04,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:39:05,507 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:39:05,515 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:39:05,516 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:39:05,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:05 BoogieIcfgContainer [2022-11-03 02:39:05,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:39:05,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:39:05,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:39:05,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:39:05,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:39:03" (1/3) ... [2022-11-03 02:39:05,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9916162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:05, skipping insertion in model container [2022-11-03 02:39:05,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:04" (2/3) ... [2022-11-03 02:39:05,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9916162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:05, skipping insertion in model container [2022-11-03 02:39:05,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:05" (3/3) ... [2022-11-03 02:39:05,527 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-03 02:39:05,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:39:05,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:39:05,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:39:05,603 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;@6315924b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:39:05,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:39:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:39:05,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:05,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:39:05,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:39:05,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:05,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420385482] [2022-11-03 02:39:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:05,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:05,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:39:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:39:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:06,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:06,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420385482] [2022-11-03 02:39:06,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420385482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:06,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746553229] [2022-11-03 02:39:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:06,148 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 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 02:39:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:06,362 INFO L93 Difference]: Finished difference Result 272 states and 408 transitions. [2022-11-03 02:39:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:06,366 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 02:39:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:06,384 INFO L225 Difference]: With dead ends: 272 [2022-11-03 02:39:06,387 INFO L226 Difference]: Without dead ends: 179 [2022-11-03 02:39:06,391 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 02:39:06,395 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:06,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 367 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-03 02:39:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 93. [2022-11-03 02:39:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 135 transitions. [2022-11-03 02:39:06,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 135 transitions. Word has length 5 [2022-11-03 02:39:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:06,451 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 135 transitions. [2022-11-03 02:39:06,451 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 02:39:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 135 transitions. [2022-11-03 02:39:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:06,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:06,454 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:06,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:39:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:06,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1914847655, now seen corresponding path program 1 times [2022-11-03 02:39:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126267664] [2022-11-03 02:39:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:06,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:06,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:06,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:06,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:39:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:07,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:07,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:07,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126267664] [2022-11-03 02:39:07,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126267664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:07,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:07,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69184332] [2022-11-03 02:39:07,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:07,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:07,157 INFO L87 Difference]: Start difference. First operand 93 states and 135 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:07,213 INFO L93 Difference]: Finished difference Result 355 states and 522 transitions. [2022-11-03 02:39:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:07,217 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:07,218 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:07,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:07,221 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 378 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:07,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 513 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 95. [2022-11-03 02:39:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 94 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-11-03 02:39:07,252 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 92 [2022-11-03 02:39:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:07,253 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-11-03 02:39:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-11-03 02:39:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:07,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:07,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:07,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:07,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:07,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1328571433, now seen corresponding path program 1 times [2022-11-03 02:39:07,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:07,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003502989] [2022-11-03 02:39:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:07,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:07,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:39:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:39:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:07,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:07,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003502989] [2022-11-03 02:39:07,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003502989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:07,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:07,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:39:07,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617739390] [2022-11-03 02:39:07,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:39:07,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:39:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:39:07,904 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:08,112 INFO L93 Difference]: Finished difference Result 274 states and 400 transitions. [2022-11-03 02:39:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:39:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:08,114 INFO L225 Difference]: With dead ends: 274 [2022-11-03 02:39:08,114 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 02:39:08,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:39:08,116 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 377 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:08,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 599 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 02:39:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 97. [2022-11-03 02:39:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 96 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-11-03 02:39:08,125 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 92 [2022-11-03 02:39:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-11-03 02:39:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-11-03 02:39:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:08,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:08,129 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:08,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:08,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash -547911385, now seen corresponding path program 1 times [2022-11-03 02:39:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:08,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702776682] [2022-11-03 02:39:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:08,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:08,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:08,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:39:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:08,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:08,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702776682] [2022-11-03 02:39:08,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702776682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:08,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419805931] [2022-11-03 02:39:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:08,705 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:08,747 INFO L93 Difference]: Finished difference Result 355 states and 520 transitions. [2022-11-03 02:39:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:08,749 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:08,749 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:08,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:08,751 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 366 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:08,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 502 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 99. [2022-11-03 02:39:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-11-03 02:39:08,759 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 92 [2022-11-03 02:39:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:08,760 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-11-03 02:39:08,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-11-03 02:39:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:08,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:08,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:08,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:08,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 776944809, now seen corresponding path program 1 times [2022-11-03 02:39:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245885897] [2022-11-03 02:39:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:08,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:08,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:08,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:39:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:09,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:09,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:09,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:09,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245885897] [2022-11-03 02:39:09,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245885897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:09,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:09,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740021475] [2022-11-03 02:39:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:09,275 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:09,329 INFO L93 Difference]: Finished difference Result 355 states and 519 transitions. [2022-11-03 02:39:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:09,331 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:09,331 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:09,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:09,335 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 360 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:09,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 501 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 101. [2022-11-03 02:39:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.43) internal successors, (143), 100 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2022-11-03 02:39:09,346 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 143 transitions. Word has length 92 [2022-11-03 02:39:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:09,348 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 143 transitions. [2022-11-03 02:39:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 143 transitions. [2022-11-03 02:39:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:09,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:09,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:09,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:09,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:09,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash -280893269, now seen corresponding path program 1 times [2022-11-03 02:39:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:09,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233800536] [2022-11-03 02:39:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:09,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:09,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:09,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:09,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:39:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:09,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:09,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233800536] [2022-11-03 02:39:09,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233800536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:09,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:09,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391169209] [2022-11-03 02:39:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:09,889 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:09,930 INFO L93 Difference]: Finished difference Result 355 states and 518 transitions. [2022-11-03 02:39:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:09,933 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:09,933 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:09,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:09,934 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 349 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:09,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 500 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 105. [2022-11-03 02:39:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2022-11-03 02:39:09,940 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 92 [2022-11-03 02:39:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:09,941 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2022-11-03 02:39:09,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2022-11-03 02:39:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:09,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:09,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:09,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:10,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash -253827667, now seen corresponding path program 1 times [2022-11-03 02:39:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:10,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867724210] [2022-11-03 02:39:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:10,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:10,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:10,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:39:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:10,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:10,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867724210] [2022-11-03 02:39:10,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867724210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:10,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:10,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419337425] [2022-11-03 02:39:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:10,453 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:10,496 INFO L93 Difference]: Finished difference Result 355 states and 517 transitions. [2022-11-03 02:39:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:10,498 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:10,498 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:10,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:10,499 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 338 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:10,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 499 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 109. [2022-11-03 02:39:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 108 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2022-11-03 02:39:10,506 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 92 [2022-11-03 02:39:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:10,507 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2022-11-03 02:39:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2022-11-03 02:39:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:10,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:10,509 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:10,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:10,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2130097071, now seen corresponding path program 1 times [2022-11-03 02:39:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:10,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363125453] [2022-11-03 02:39:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:10,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:10,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:10,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:39:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:10,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:11,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:11,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363125453] [2022-11-03 02:39:11,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363125453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:11,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:11,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:11,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487940878] [2022-11-03 02:39:11,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:11,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:11,012 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:11,056 INFO L93 Difference]: Finished difference Result 355 states and 516 transitions. [2022-11-03 02:39:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:11,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:11,058 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:11,058 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:11,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:11,059 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 327 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:11,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 498 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 113. [2022-11-03 02:39:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4107142857142858) internal successors, (158), 112 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2022-11-03 02:39:11,065 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 92 [2022-11-03 02:39:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:11,066 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2022-11-03 02:39:11,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2022-11-03 02:39:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:11,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:11,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:11,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:11,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1637470897, now seen corresponding path program 1 times [2022-11-03 02:39:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:11,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144249922] [2022-11-03 02:39:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:11,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:11,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:11,283 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:11,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:39:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:11,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:11,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144249922] [2022-11-03 02:39:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144249922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:11,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:11,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331134125] [2022-11-03 02:39:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:11,619 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:11,654 INFO L93 Difference]: Finished difference Result 355 states and 515 transitions. [2022-11-03 02:39:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:11,658 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:11,659 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:11,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:11,662 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 321 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:11,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 506 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 115. [2022-11-03 02:39:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 114 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 160 transitions. [2022-11-03 02:39:11,670 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 160 transitions. Word has length 92 [2022-11-03 02:39:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:11,671 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 160 transitions. [2022-11-03 02:39:11,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 160 transitions. [2022-11-03 02:39:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:11,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:11,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:11,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:11,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 421317171, now seen corresponding path program 1 times [2022-11-03 02:39:11,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:11,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368032976] [2022-11-03 02:39:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:11,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:11,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:11,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:39:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:12,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:12,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:12,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368032976] [2022-11-03 02:39:12,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368032976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:12,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:12,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:12,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089387413] [2022-11-03 02:39:12,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:12,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:12,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:12,230 INFO L87 Difference]: Start difference. First operand 115 states and 160 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:12,264 INFO L93 Difference]: Finished difference Result 355 states and 514 transitions. [2022-11-03 02:39:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:12,267 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:12,267 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:12,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:12,268 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 315 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:12,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 505 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 117. [2022-11-03 02:39:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.396551724137931) internal successors, (162), 116 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2022-11-03 02:39:12,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 92 [2022-11-03 02:39:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:12,276 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2022-11-03 02:39:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2022-11-03 02:39:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:12,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:12,278 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:12,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:12,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1264862667, now seen corresponding path program 1 times [2022-11-03 02:39:12,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890354120] [2022-11-03 02:39:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:12,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:12,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:12,498 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:12,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:39:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:12,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:12,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890354120] [2022-11-03 02:39:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890354120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:12,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744749859] [2022-11-03 02:39:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:12,841 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:12,888 INFO L93 Difference]: Finished difference Result 355 states and 513 transitions. [2022-11-03 02:39:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:12,890 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:12,890 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:12,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:12,891 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 304 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:12,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 501 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 121. [2022-11-03 02:39:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3916666666666666) internal successors, (167), 120 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2022-11-03 02:39:12,897 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 92 [2022-11-03 02:39:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:12,897 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2022-11-03 02:39:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2022-11-03 02:39:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:12,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:12,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:12,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:13,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 696711991, now seen corresponding path program 1 times [2022-11-03 02:39:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:13,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212723709] [2022-11-03 02:39:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:13,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:39:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:13,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:13,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212723709] [2022-11-03 02:39:13,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212723709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:13,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:13,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723000620] [2022-11-03 02:39:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:13,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:13,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:13,456 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:13,497 INFO L93 Difference]: Finished difference Result 355 states and 512 transitions. [2022-11-03 02:39:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:13,499 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:13,500 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:13,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:13,501 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 298 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 500 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 123. [2022-11-03 02:39:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 122 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-11-03 02:39:13,509 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 92 [2022-11-03 02:39:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:13,510 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-11-03 02:39:13,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-11-03 02:39:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:13,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:13,512 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:13,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:13,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1257411769, now seen corresponding path program 1 times [2022-11-03 02:39:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:13,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653154663] [2022-11-03 02:39:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:13,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:13,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:13,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:39:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:13,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:13,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:14,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:14,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653154663] [2022-11-03 02:39:14,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653154663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:14,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:14,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126180860] [2022-11-03 02:39:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:14,033 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:14,086 INFO L93 Difference]: Finished difference Result 355 states and 511 transitions. [2022-11-03 02:39:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:14,088 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:14,088 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:14,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:14,089 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 287 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 493 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 127. [2022-11-03 02:39:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.380952380952381) internal successors, (174), 126 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-11-03 02:39:14,095 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 92 [2022-11-03 02:39:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:14,095 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-11-03 02:39:14,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-11-03 02:39:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:14,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:14,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:14,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:14,314 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1650770117, now seen corresponding path program 1 times [2022-11-03 02:39:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199701842] [2022-11-03 02:39:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:14,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:14,317 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:14,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:39:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:14,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:14,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199701842] [2022-11-03 02:39:14,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199701842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:14,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:14,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507736493] [2022-11-03 02:39:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:14,632 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:14,676 INFO L93 Difference]: Finished difference Result 355 states and 510 transitions. [2022-11-03 02:39:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:14,678 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:14,679 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:14,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:14,680 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 271 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:14,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 492 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 133. [2022-11-03 02:39:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.378787878787879) internal successors, (182), 132 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 182 transitions. [2022-11-03 02:39:14,685 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 182 transitions. Word has length 92 [2022-11-03 02:39:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:14,685 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 182 transitions. [2022-11-03 02:39:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 182 transitions. [2022-11-03 02:39:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:14,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:14,687 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:14,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 02:39:14,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:14,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1666288835, now seen corresponding path program 1 times [2022-11-03 02:39:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559035224] [2022-11-03 02:39:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:14,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:14,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:14,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:39:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:15,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:15,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:15,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559035224] [2022-11-03 02:39:15,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559035224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:15,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:15,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513566071] [2022-11-03 02:39:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:15,336 INFO L87 Difference]: Start difference. First operand 133 states and 182 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:15,424 INFO L93 Difference]: Finished difference Result 355 states and 509 transitions. [2022-11-03 02:39:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:15,426 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:15,427 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:15,428 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 265 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 458 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 135. [2022-11-03 02:39:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.373134328358209) internal successors, (184), 134 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 184 transitions. [2022-11-03 02:39:15,433 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 184 transitions. Word has length 92 [2022-11-03 02:39:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 184 transitions. [2022-11-03 02:39:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 184 transitions. [2022-11-03 02:39:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:15,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:15,435 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:15,649 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2019377217, now seen corresponding path program 1 times [2022-11-03 02:39:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:15,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648099658] [2022-11-03 02:39:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:15,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:15,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:15,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:15,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:39:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:39:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:16,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:16,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648099658] [2022-11-03 02:39:16,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648099658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:16,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:16,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390881692] [2022-11-03 02:39:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:16,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:16,270 INFO L87 Difference]: Start difference. First operand 135 states and 184 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:16,393 INFO L93 Difference]: Finished difference Result 400 states and 573 transitions. [2022-11-03 02:39:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:16,395 INFO L225 Difference]: With dead ends: 400 [2022-11-03 02:39:16,395 INFO L226 Difference]: Without dead ends: 311 [2022-11-03 02:39:16,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:16,397 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 453 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:16,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 738 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-03 02:39:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 137. [2022-11-03 02:39:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3676470588235294) internal successors, (186), 136 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2022-11-03 02:39:16,404 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 92 [2022-11-03 02:39:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:16,404 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2022-11-03 02:39:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2022-11-03 02:39:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:16,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:16,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:16,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:16,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1125890879, now seen corresponding path program 1 times [2022-11-03 02:39:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310372842] [2022-11-03 02:39:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:16,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:16,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:39:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:16,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:16,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:16,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310372842] [2022-11-03 02:39:16,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310372842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:16,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:16,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068121537] [2022-11-03 02:39:16,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:16,946 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:17,012 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-11-03 02:39:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:17,014 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:17,015 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:17,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:17,016 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 253 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:17,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 477 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:17,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 139. [2022-11-03 02:39:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3623188405797102) internal successors, (188), 138 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2022-11-03 02:39:17,021 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 92 [2022-11-03 02:39:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:17,022 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2022-11-03 02:39:17,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2022-11-03 02:39:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:17,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:17,023 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:17,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:17,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2023284157, now seen corresponding path program 1 times [2022-11-03 02:39:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:17,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186635823] [2022-11-03 02:39:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:17,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:17,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:17,240 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:17,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:39:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:39:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:17,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:17,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186635823] [2022-11-03 02:39:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186635823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:17,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:17,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:17,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343951404] [2022-11-03 02:39:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:17,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:17,918 INFO L87 Difference]: Start difference. First operand 139 states and 188 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:18,047 INFO L93 Difference]: Finished difference Result 400 states and 571 transitions. [2022-11-03 02:39:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:18,049 INFO L225 Difference]: With dead ends: 400 [2022-11-03 02:39:18,050 INFO L226 Difference]: Without dead ends: 311 [2022-11-03 02:39:18,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:18,051 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 439 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 730 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-03 02:39:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2022-11-03 02:39:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3571428571428572) internal successors, (190), 140 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2022-11-03 02:39:18,058 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 92 [2022-11-03 02:39:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:18,058 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2022-11-03 02:39:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2022-11-03 02:39:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:18,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:18,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:18,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-03 02:39:18,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:18,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1599637435, now seen corresponding path program 1 times [2022-11-03 02:39:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982468791] [2022-11-03 02:39:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:18,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:18,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:18,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:18,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:39:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:18,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:18,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:18,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982468791] [2022-11-03 02:39:18,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982468791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:18,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:18,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094137153] [2022-11-03 02:39:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:18,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:18,585 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:18,653 INFO L93 Difference]: Finished difference Result 355 states and 505 transitions. [2022-11-03 02:39:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:18,655 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:18,655 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:18,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:18,657 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 236 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:18,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 475 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 145. [2022-11-03 02:39:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3541666666666667) internal successors, (195), 144 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 195 transitions. [2022-11-03 02:39:18,663 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 195 transitions. Word has length 92 [2022-11-03 02:39:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:18,664 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 195 transitions. [2022-11-03 02:39:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 195 transitions. [2022-11-03 02:39:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:18,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:18,666 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:18,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:18,873 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -940105913, now seen corresponding path program 1 times [2022-11-03 02:39:18,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:18,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697411168] [2022-11-03 02:39:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:18,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:18,876 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:39:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:19,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:19,301 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697411168] [2022-11-03 02:39:19,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697411168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:19,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:19,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252303335] [2022-11-03 02:39:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:19,305 INFO L87 Difference]: Start difference. First operand 145 states and 195 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:19,363 INFO L93 Difference]: Finished difference Result 355 states and 504 transitions. [2022-11-03 02:39:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:19,365 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:19,366 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:19,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:19,368 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 230 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:19,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 486 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2022-11-03 02:39:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3493150684931507) internal successors, (197), 146 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 197 transitions. [2022-11-03 02:39:19,382 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 197 transitions. Word has length 92 [2022-11-03 02:39:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:19,382 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 197 transitions. [2022-11-03 02:39:19,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 197 transitions. [2022-11-03 02:39:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:19,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:19,384 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:19,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:19,597 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1784111415, now seen corresponding path program 1 times [2022-11-03 02:39:19,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:19,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966384838] [2022-11-03 02:39:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:19,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:19,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:19,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:39:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:19,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:19,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:19,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:19,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966384838] [2022-11-03 02:39:19,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966384838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:19,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:19,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589412501] [2022-11-03 02:39:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:19,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:19,959 INFO L87 Difference]: Start difference. First operand 147 states and 197 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:19,996 INFO L93 Difference]: Finished difference Result 355 states and 503 transitions. [2022-11-03 02:39:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:19,998 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:19,999 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:19,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:20,000 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 224 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:20,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 494 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 149. [2022-11-03 02:39:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3445945945945945) internal successors, (199), 148 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2022-11-03 02:39:20,007 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 92 [2022-11-03 02:39:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2022-11-03 02:39:20,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2022-11-03 02:39:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:20,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:20,010 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:20,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:20,226 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1856497973, now seen corresponding path program 1 times [2022-11-03 02:39:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100609899] [2022-11-03 02:39:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:20,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:20,229 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:20,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:39:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:20,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:20,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100609899] [2022-11-03 02:39:20,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100609899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:20,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:20,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417192416] [2022-11-03 02:39:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:20,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:20,576 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:20,621 INFO L93 Difference]: Finished difference Result 355 states and 502 transitions. [2022-11-03 02:39:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:20,623 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:20,623 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:20,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:20,625 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 218 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:20,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 493 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 151. [2022-11-03 02:39:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.34) internal successors, (201), 150 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-11-03 02:39:20,632 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 92 [2022-11-03 02:39:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:20,633 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-11-03 02:39:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-11-03 02:39:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:20,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:20,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:20,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:20,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:20,851 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1154898099, now seen corresponding path program 1 times [2022-11-03 02:39:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:20,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696639080] [2022-11-03 02:39:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:20,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:20,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:20,854 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:39:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:21,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:21,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696639080] [2022-11-03 02:39:21,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696639080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:21,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:21,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362224888] [2022-11-03 02:39:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:21,289 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:21,338 INFO L93 Difference]: Finished difference Result 355 states and 501 transitions. [2022-11-03 02:39:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:21,341 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:21,341 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:21,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:21,342 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 207 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:21,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 483 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 155. [2022-11-03 02:39:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2022-11-03 02:39:21,350 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 92 [2022-11-03 02:39:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:21,350 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2022-11-03 02:39:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2022-11-03 02:39:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:21,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:21,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:21,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:21,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:21,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash 768329935, now seen corresponding path program 1 times [2022-11-03 02:39:21,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:21,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024154721] [2022-11-03 02:39:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:21,573 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:21,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:39:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:21,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:21,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024154721] [2022-11-03 02:39:21,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024154721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:21,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:21,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:21,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175654136] [2022-11-03 02:39:21,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:21,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:21,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:22,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:22,000 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:22,050 INFO L93 Difference]: Finished difference Result 355 states and 500 transitions. [2022-11-03 02:39:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:22,052 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:22,052 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:22,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:22,054 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 201 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:22,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 482 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 157. [2022-11-03 02:39:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3333333333333333) internal successors, (208), 156 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2022-11-03 02:39:22,061 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 92 [2022-11-03 02:39:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:22,061 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2022-11-03 02:39:22,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2022-11-03 02:39:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:22,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:22,063 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:22,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:22,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:22,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 908878545, now seen corresponding path program 1 times [2022-11-03 02:39:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82742051] [2022-11-03 02:39:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:22,279 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:22,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:39:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:22,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:22,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82742051] [2022-11-03 02:39:22,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82742051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:22,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:22,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793789097] [2022-11-03 02:39:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:22,648 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:22,692 INFO L93 Difference]: Finished difference Result 355 states and 499 transitions. [2022-11-03 02:39:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:22,695 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:22,695 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:22,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:22,696 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 195 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:22,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 487 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 159. [2022-11-03 02:39:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 158 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-11-03 02:39:22,703 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 92 [2022-11-03 02:39:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:22,704 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-11-03 02:39:22,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-11-03 02:39:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:22,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:22,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:22,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:22,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:22,923 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -896559789, now seen corresponding path program 1 times [2022-11-03 02:39:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043307067] [2022-11-03 02:39:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:22,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:22,925 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:39:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:23,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:23,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043307067] [2022-11-03 02:39:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043307067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:23,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:23,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:23,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531724782] [2022-11-03 02:39:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:23,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:23,352 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:23,420 INFO L93 Difference]: Finished difference Result 355 states and 498 transitions. [2022-11-03 02:39:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:23,422 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:23,422 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:23,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:23,425 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 184 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:23,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 468 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2022-11-03 02:39:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3271604938271604) internal successors, (215), 162 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2022-11-03 02:39:23,434 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 92 [2022-11-03 02:39:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:23,434 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2022-11-03 02:39:23,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2022-11-03 02:39:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:23,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:23,435 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:23,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:23,657 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1709463765, now seen corresponding path program 1 times [2022-11-03 02:39:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937774668] [2022-11-03 02:39:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:23,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:23,660 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:23,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:39:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:24,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:24,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:24,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937774668] [2022-11-03 02:39:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937774668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:24,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810508971] [2022-11-03 02:39:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:24,082 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:24,166 INFO L93 Difference]: Finished difference Result 355 states and 497 transitions. [2022-11-03 02:39:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:24,169 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:24,170 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:24,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:24,171 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 178 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:24,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 467 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 165. [2022-11-03 02:39:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3231707317073171) internal successors, (217), 164 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2022-11-03 02:39:24,179 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 92 [2022-11-03 02:39:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:24,180 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2022-11-03 02:39:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2022-11-03 02:39:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:24,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:24,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:24,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:24,398 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 121115863, now seen corresponding path program 1 times [2022-11-03 02:39:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986601264] [2022-11-03 02:39:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:24,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:24,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:24,401 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:24,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:39:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:24,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:24,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:25,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:25,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:25,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986601264] [2022-11-03 02:39:25,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986601264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:25,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:25,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640450004] [2022-11-03 02:39:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:25,041 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:25,143 INFO L93 Difference]: Finished difference Result 355 states and 496 transitions. [2022-11-03 02:39:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:25,145 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:25,146 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:25,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:25,147 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 172 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:25,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 445 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2022-11-03 02:39:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.319277108433735) internal successors, (219), 166 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2022-11-03 02:39:25,155 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 92 [2022-11-03 02:39:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:25,156 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2022-11-03 02:39:25,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2022-11-03 02:39:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:25,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:25,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:25,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:25,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:25,358 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1158747815, now seen corresponding path program 1 times [2022-11-03 02:39:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117386093] [2022-11-03 02:39:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:25,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:25,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:25,360 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:25,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:39:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:39:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:26,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:26,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117386093] [2022-11-03 02:39:26,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117386093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:26,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:26,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:26,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469710223] [2022-11-03 02:39:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:26,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:26,030 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:26,130 INFO L93 Difference]: Finished difference Result 400 states and 560 transitions. [2022-11-03 02:39:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:26,132 INFO L225 Difference]: With dead ends: 400 [2022-11-03 02:39:26,132 INFO L226 Difference]: Without dead ends: 311 [2022-11-03 02:39:26,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:26,133 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 347 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:26,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 678 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-03 02:39:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 169. [2022-11-03 02:39:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3154761904761905) internal successors, (221), 168 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-11-03 02:39:26,140 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 92 [2022-11-03 02:39:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:26,141 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-11-03 02:39:26,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-11-03 02:39:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:26,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:26,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:26,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:26,358 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1745553829, now seen corresponding path program 1 times [2022-11-03 02:39:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697220987] [2022-11-03 02:39:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:26,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:26,360 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:26,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:39:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:26,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:26,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697220987] [2022-11-03 02:39:26,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697220987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:26,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:26,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168180597] [2022-11-03 02:39:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:26,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:26,784 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:26,852 INFO L93 Difference]: Finished difference Result 355 states and 494 transitions. [2022-11-03 02:39:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:26,855 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:26,855 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:26,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:26,857 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 160 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:26,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 464 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2022-11-03 02:39:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-11-03 02:39:26,865 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 92 [2022-11-03 02:39:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:26,865 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-11-03 02:39:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-11-03 02:39:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:26,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:26,867 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:26,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:39:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:27,082 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1044489251, now seen corresponding path program 1 times [2022-11-03 02:39:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785412924] [2022-11-03 02:39:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:27,086 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:27,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:39:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:39:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:27,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:27,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:27,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785412924] [2022-11-03 02:39:27,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785412924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:27,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:27,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340535276] [2022-11-03 02:39:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:27,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:27,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:27,820 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:27,919 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2022-11-03 02:39:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:27,921 INFO L225 Difference]: With dead ends: 400 [2022-11-03 02:39:27,921 INFO L226 Difference]: Without dead ends: 311 [2022-11-03 02:39:27,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:39:27,924 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 333 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:27,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 670 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-03 02:39:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 173. [2022-11-03 02:39:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.308139534883721) internal successors, (225), 172 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 225 transitions. [2022-11-03 02:39:27,932 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 225 transitions. Word has length 92 [2022-11-03 02:39:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:27,932 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 225 transitions. [2022-11-03 02:39:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 225 transitions. [2022-11-03 02:39:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:27,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:27,934 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:27,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:28,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:28,150 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash -364430881, now seen corresponding path program 1 times [2022-11-03 02:39:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:28,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184431970] [2022-11-03 02:39:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:28,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:28,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:28,152 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:28,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:39:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:39:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:28,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:28,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184431970] [2022-11-03 02:39:28,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184431970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:28,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:28,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860464115] [2022-11-03 02:39:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:28,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:39:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:39:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:39:28,521 INFO L87 Difference]: Start difference. First operand 173 states and 225 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:28,593 INFO L93 Difference]: Finished difference Result 355 states and 492 transitions. [2022-11-03 02:39:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:39:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:28,595 INFO L225 Difference]: With dead ends: 355 [2022-11-03 02:39:28,595 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:39:28,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:28,599 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 143 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:28,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 462 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:39:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 177. [2022-11-03 02:39:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.3068181818181819) internal successors, (230), 176 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 230 transitions. [2022-11-03 02:39:28,609 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 230 transitions. Word has length 92 [2022-11-03 02:39:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:28,609 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 230 transitions. [2022-11-03 02:39:28,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 230 transitions. [2022-11-03 02:39:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:39:28,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:28,611 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:28,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:28,828 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -362583839, now seen corresponding path program 1 times [2022-11-03 02:39:28,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:28,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808713666] [2022-11-03 02:39:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:28,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:28,833 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:28,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:39:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:39:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:31,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808713666] [2022-11-03 02:39:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808713666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038114734] [2022-11-03 02:39:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:31,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:31,497 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:31,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:39:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:39:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:32,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:33,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1038114734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871945844] [2022-11-03 02:39:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:33,631 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:33,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:39:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:39:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:39:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871945844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:35,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:35,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 20 [2022-11-03 02:39:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113599748] [2022-11-03 02:39:35,517 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:39:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:39:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:39:35,520 INFO L87 Difference]: Start difference. First operand 177 states and 230 transitions. Second operand has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:36,250 INFO L93 Difference]: Finished difference Result 438 states and 613 transitions. [2022-11-03 02:39:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:39:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:39:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:36,253 INFO L225 Difference]: With dead ends: 438 [2022-11-03 02:39:36,253 INFO L226 Difference]: Without dead ends: 436 [2022-11-03 02:39:36,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 523 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:39:36,254 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1099 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:36,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 1886 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 98 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-11-03 02:39:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-03 02:39:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 264. [2022-11-03 02:39:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.3650190114068441) internal successors, (359), 263 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 359 transitions. [2022-11-03 02:39:36,268 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 359 transitions. Word has length 92 [2022-11-03 02:39:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 359 transitions. [2022-11-03 02:39:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 359 transitions. [2022-11-03 02:39:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:36,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:36,271 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:36,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:36,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:36,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 02:39:36,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:36,896 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:36,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1502912079, now seen corresponding path program 1 times [2022-11-03 02:39:36,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:36,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639431457] [2022-11-03 02:39:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:36,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:36,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:39:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:37,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:37,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639431457] [2022-11-03 02:39:37,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639431457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101243680] [2022-11-03 02:39:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:37,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:37,906 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:37,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:39:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:39:38,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:38,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101243680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:38,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:38,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:38,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018647020] [2022-11-03 02:39:38,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:38,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:38,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:38,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:38,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:38,462 INFO L87 Difference]: Start difference. First operand 264 states and 359 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:38,546 INFO L93 Difference]: Finished difference Result 876 states and 1236 transitions. [2022-11-03 02:39:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:39:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:38,549 INFO L225 Difference]: With dead ends: 876 [2022-11-03 02:39:38,549 INFO L226 Difference]: Without dead ends: 700 [2022-11-03 02:39:38,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:38,551 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 448 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:38,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 731 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-03 02:39:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 284. [2022-11-03 02:39:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.3674911660777385) internal successors, (387), 283 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 387 transitions. [2022-11-03 02:39:38,561 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 387 transitions. Word has length 179 [2022-11-03 02:39:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 387 transitions. [2022-11-03 02:39:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 387 transitions. [2022-11-03 02:39:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:38,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:38,563 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:38,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:38,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:38,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:38,967 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1057950767, now seen corresponding path program 1 times [2022-11-03 02:39:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103766070] [2022-11-03 02:39:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:38,970 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:38,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:39:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:39,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103766070] [2022-11-03 02:39:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103766070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571788328] [2022-11-03 02:39:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:39,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:40,000 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:40,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:39:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:39:40,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:40,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [571788328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:40,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:40,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:40,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671871158] [2022-11-03 02:39:40,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:40,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:40,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:40,634 INFO L87 Difference]: Start difference. First operand 284 states and 387 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:40,767 INFO L93 Difference]: Finished difference Result 952 states and 1345 transitions. [2022-11-03 02:39:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:40,771 INFO L225 Difference]: With dead ends: 952 [2022-11-03 02:39:40,771 INFO L226 Difference]: Without dead ends: 756 [2022-11-03 02:39:40,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:40,776 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 421 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:40,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 703 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-11-03 02:39:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 324. [2022-11-03 02:39:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.3715170278637772) internal successors, (443), 323 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 443 transitions. [2022-11-03 02:39:40,791 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 443 transitions. Word has length 179 [2022-11-03 02:39:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:40,792 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 443 transitions. [2022-11-03 02:39:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 443 transitions. [2022-11-03 02:39:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:40,794 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:40,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:41,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:41,209 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -90600113, now seen corresponding path program 1 times [2022-11-03 02:39:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480625498] [2022-11-03 02:39:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:41,215 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:41,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:39:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:42,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:42,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480625498] [2022-11-03 02:39:42,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480625498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500273663] [2022-11-03 02:39:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:42,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:42,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:42,401 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:42,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:39:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:39:42,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:42,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500273663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:42,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:42,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079498136] [2022-11-03 02:39:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:42,974 INFO L87 Difference]: Start difference. First operand 324 states and 443 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:43,077 INFO L93 Difference]: Finished difference Result 962 states and 1358 transitions. [2022-11-03 02:39:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:43,080 INFO L225 Difference]: With dead ends: 962 [2022-11-03 02:39:43,080 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 02:39:43,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:43,082 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 332 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:43,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 760 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 02:39:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 336. [2022-11-03 02:39:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.3701492537313433) internal successors, (459), 335 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 459 transitions. [2022-11-03 02:39:43,094 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 459 transitions. Word has length 179 [2022-11-03 02:39:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:43,095 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 459 transitions. [2022-11-03 02:39:43,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 459 transitions. [2022-11-03 02:39:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:43,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:43,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:43,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:43,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:39:43,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:43,515 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash -534500787, now seen corresponding path program 1 times [2022-11-03 02:39:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681622347] [2022-11-03 02:39:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:43,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:43,518 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:43,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:39:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:43,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:44,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:44,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681622347] [2022-11-03 02:39:44,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681622347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572532861] [2022-11-03 02:39:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:44,453 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:44,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:39:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:44,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:39:44,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:44,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572532861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:44,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:44,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:44,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683062074] [2022-11-03 02:39:44,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:44,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:44,997 INFO L87 Difference]: Start difference. First operand 336 states and 459 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:45,130 INFO L93 Difference]: Finished difference Result 948 states and 1336 transitions. [2022-11-03 02:39:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:45,136 INFO L225 Difference]: With dead ends: 948 [2022-11-03 02:39:45,136 INFO L226 Difference]: Without dead ends: 700 [2022-11-03 02:39:45,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:45,138 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 273 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:45,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 755 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-03 02:39:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 344. [2022-11-03 02:39:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.3673469387755102) internal successors, (469), 343 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2022-11-03 02:39:45,154 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 179 [2022-11-03 02:39:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:45,155 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2022-11-03 02:39:45,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2022-11-03 02:39:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:45,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:45,158 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:45,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:45,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 02:39:45,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:45,562 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1310866379, now seen corresponding path program 1 times [2022-11-03 02:39:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:45,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875627984] [2022-11-03 02:39:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:45,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:45,564 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:45,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:39:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:46,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:46,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875627984] [2022-11-03 02:39:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875627984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152201498] [2022-11-03 02:39:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:46,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:46,486 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:46,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:39:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:39:46,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:46,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1152201498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:46,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:46,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979410763] [2022-11-03 02:39:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:46,985 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:47,095 INFO L93 Difference]: Finished difference Result 1174 states and 1660 transitions. [2022-11-03 02:39:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:47,099 INFO L225 Difference]: With dead ends: 1174 [2022-11-03 02:39:47,099 INFO L226 Difference]: Without dead ends: 918 [2022-11-03 02:39:47,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:47,101 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 417 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:47,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 938 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-03 02:39:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 400. [2022-11-03 02:39:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.3759398496240602) internal successors, (549), 399 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 549 transitions. [2022-11-03 02:39:47,115 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 549 transitions. Word has length 179 [2022-11-03 02:39:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:47,116 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 549 transitions. [2022-11-03 02:39:47,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 549 transitions. [2022-11-03 02:39:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:47,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:47,118 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:47,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 02:39:47,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:47,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:47,522 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 888164553, now seen corresponding path program 1 times [2022-11-03 02:39:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:47,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789932230] [2022-11-03 02:39:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:47,524 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:47,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:39:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:47,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:48,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:48,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789932230] [2022-11-03 02:39:48,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789932230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483927397] [2022-11-03 02:39:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:48,523 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:48,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:39:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:39:49,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:49,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1483927397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:49,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:49,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:39:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222245387] [2022-11-03 02:39:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:49,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:49,125 INFO L87 Difference]: Start difference. First operand 400 states and 549 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:49,268 INFO L93 Difference]: Finished difference Result 1228 states and 1747 transitions. [2022-11-03 02:39:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:49,273 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 02:39:49,273 INFO L226 Difference]: Without dead ends: 916 [2022-11-03 02:39:49,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:39:49,275 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 274 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:49,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 795 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-03 02:39:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 500. [2022-11-03 02:39:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.3927855711422845) internal successors, (695), 499 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 695 transitions. [2022-11-03 02:39:49,300 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 695 transitions. Word has length 179 [2022-11-03 02:39:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:49,301 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 695 transitions. [2022-11-03 02:39:49,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 695 transitions. [2022-11-03 02:39:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:49,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:49,303 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:49,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:49,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-03 02:39:49,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:49,722 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -886842809, now seen corresponding path program 1 times [2022-11-03 02:39:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:49,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67461047] [2022-11-03 02:39:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:49,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:49,724 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:49,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:39:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:50,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:50,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67461047] [2022-11-03 02:39:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67461047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518548469] [2022-11-03 02:39:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:50,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:50,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:50,788 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:50,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 02:39:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:51,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:52,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518548469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325491146] [2022-11-03 02:39:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:52,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:52,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:52,081 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:52,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 02:39:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:39:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:39:52,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:39:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325491146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:53,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2022-11-03 02:39:53,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762330274] [2022-11-03 02:39:53,107 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:53,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:39:53,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:39:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:39:53,109 INFO L87 Difference]: Start difference. First operand 500 states and 695 transitions. Second operand has 17 states, 17 states have (on average 22.058823529411764) internal successors, (375), 17 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:55,243 INFO L93 Difference]: Finished difference Result 3378 states and 4828 transitions. [2022-11-03 02:39:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:39:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 22.058823529411764) internal successors, (375), 17 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:55,256 INFO L225 Difference]: With dead ends: 3378 [2022-11-03 02:39:55,257 INFO L226 Difference]: Without dead ends: 2908 [2022-11-03 02:39:55,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1051 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=847, Invalid=2345, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:39:55,260 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3794 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3794 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:55,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3794 Valid, 1380 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:39:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2022-11-03 02:39:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 514. [2022-11-03 02:39:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.3820662768031189) internal successors, (709), 513 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 709 transitions. [2022-11-03 02:39:55,299 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 709 transitions. Word has length 179 [2022-11-03 02:39:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:55,300 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 709 transitions. [2022-11-03 02:39:55,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.058823529411764) internal successors, (375), 17 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 709 transitions. [2022-11-03 02:39:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:55,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:55,302 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:55,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:55,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-03 02:39:55,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:55,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:55,910 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:55,911 INFO L85 PathProgramCache]: Analyzing trace with hash 488455627, now seen corresponding path program 1 times [2022-11-03 02:39:55,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:55,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17646709] [2022-11-03 02:39:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:55,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:55,914 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:55,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:39:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:56,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:39:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:39:56,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:39:57,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17646709] [2022-11-03 02:39:57,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17646709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678001652] [2022-11-03 02:39:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:57,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:57,078 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:39:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:39:57,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678001652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:57,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:57,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 21 [2022-11-03 02:39:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133796450] [2022-11-03 02:39:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:57,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:57,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:39:57,693 INFO L87 Difference]: Start difference. First operand 514 states and 709 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:57,808 INFO L93 Difference]: Finished difference Result 1482 states and 2097 transitions. [2022-11-03 02:39:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:39:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:39:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:57,812 INFO L225 Difference]: With dead ends: 1482 [2022-11-03 02:39:57,812 INFO L226 Difference]: Without dead ends: 1056 [2022-11-03 02:39:57,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:39:57,814 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 654 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:57,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 511 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:39:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-03 02:39:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 646. [2022-11-03 02:39:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.3829457364341085) internal successors, (892), 645 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 892 transitions. [2022-11-03 02:39:57,835 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 892 transitions. Word has length 179 [2022-11-03 02:39:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:57,835 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 892 transitions. [2022-11-03 02:39:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 892 transitions. [2022-11-03 02:39:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:39:57,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:57,838 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:57,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:39:58,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:58,256 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1190055501, now seen corresponding path program 1 times [2022-11-03 02:39:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:58,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086125773] [2022-11-03 02:39:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:58,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:58,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:58,259 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:58,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:39:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:39:58,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:39:59,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:39:59,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086125773] [2022-11-03 02:39:59,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086125773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050240556] [2022-11-03 02:39:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:59,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:59,412 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:59,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:39:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:40:00,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:00,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2050240556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:00,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:00,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 21 [2022-11-03 02:40:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811791629] [2022-11-03 02:40:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:40:00,008 INFO L87 Difference]: Start difference. First operand 646 states and 892 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:00,132 INFO L93 Difference]: Finished difference Result 2398 states and 3384 transitions. [2022-11-03 02:40:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:00,139 INFO L225 Difference]: With dead ends: 2398 [2022-11-03 02:40:00,139 INFO L226 Difference]: Without dead ends: 1840 [2022-11-03 02:40:00,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:40:00,142 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 530 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:00,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 551 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-11-03 02:40:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 932. [2022-11-03 02:40:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 1.3920515574650913) internal successors, (1296), 931 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1296 transitions. [2022-11-03 02:40:00,172 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1296 transitions. Word has length 179 [2022-11-03 02:40:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:00,172 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1296 transitions. [2022-11-03 02:40:00,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1296 transitions. [2022-11-03 02:40:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:00,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:00,175 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:00,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 02:40:00,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-03 02:40:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:00,591 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:00,591 INFO L85 PathProgramCache]: Analyzing trace with hash -615382833, now seen corresponding path program 1 times [2022-11-03 02:40:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:00,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69656228] [2022-11-03 02:40:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:00,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:00,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:00,594 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:40:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:40:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:01,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:01,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:01,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69656228] [2022-11-03 02:40:01,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69656228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:01,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840019710] [2022-11-03 02:40:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:01,750 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:01,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:40:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:40:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:02,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:03,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840019710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792509594] [2022-11-03 02:40:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:03,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:03,063 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:03,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 02:40:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:40:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:40:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:40:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792509594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:03,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:03,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 7, 7] total 25 [2022-11-03 02:40:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183917192] [2022-11-03 02:40:03,954 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:03,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:40:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:40:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:40:03,957 INFO L87 Difference]: Start difference. First operand 932 states and 1296 transitions. Second operand has 25 states, 25 states have (on average 14.92) internal successors, (373), 25 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:08,413 INFO L93 Difference]: Finished difference Result 7076 states and 9986 transitions. [2022-11-03 02:40:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-03 02:40:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 14.92) internal successors, (373), 25 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:08,431 INFO L225 Difference]: With dead ends: 7076 [2022-11-03 02:40:08,431 INFO L226 Difference]: Without dead ends: 6180 [2022-11-03 02:40:08,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1041 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2041, Invalid=8671, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 02:40:08,437 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 5798 mSDsluCounter, 3767 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5798 SdHoareTripleChecker+Valid, 3943 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:08,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5798 Valid, 3943 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:40:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6180 states. [2022-11-03 02:40:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6180 to 938. [2022-11-03 02:40:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.3799359658484525) internal successors, (1293), 937 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1293 transitions. [2022-11-03 02:40:08,492 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1293 transitions. Word has length 179 [2022-11-03 02:40:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:08,493 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1293 transitions. [2022-11-03 02:40:08,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 14.92) internal successors, (373), 25 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1293 transitions. [2022-11-03 02:40:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:08,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:08,496 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:08,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:08,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:08,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-03 02:40:09,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:09,110 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1455782605, now seen corresponding path program 1 times [2022-11-03 02:40:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:09,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725588251] [2022-11-03 02:40:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:09,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:09,112 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:09,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:40:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:09,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:10,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725588251] [2022-11-03 02:40:10,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725588251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006604837] [2022-11-03 02:40:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:10,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:10,081 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:10,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 02:40:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:40:10,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:10,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006604837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:10,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:10,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 02:40:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591307728] [2022-11-03 02:40:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:40:10,632 INFO L87 Difference]: Start difference. First operand 938 states and 1293 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:10,752 INFO L93 Difference]: Finished difference Result 3266 states and 4565 transitions. [2022-11-03 02:40:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:10,759 INFO L225 Difference]: With dead ends: 3266 [2022-11-03 02:40:10,760 INFO L226 Difference]: Without dead ends: 2416 [2022-11-03 02:40:10,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:40:10,762 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 470 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:10,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 568 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-03 02:40:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 986. [2022-11-03 02:40:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.3736040609137057) internal successors, (1353), 985 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1353 transitions. [2022-11-03 02:40:10,797 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1353 transitions. Word has length 179 [2022-11-03 02:40:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:10,797 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1353 transitions. [2022-11-03 02:40:10,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1353 transitions. [2022-11-03 02:40:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:10,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:10,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:10,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:11,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:40:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:11,205 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1440263887, now seen corresponding path program 1 times [2022-11-03 02:40:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009057545] [2022-11-03 02:40:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:11,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:11,208 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:11,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:40:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:11,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:12,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009057545] [2022-11-03 02:40:12,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009057545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [246088922] [2022-11-03 02:40:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:12,180 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:12,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 02:40:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:40:12,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:12,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [246088922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:12,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:12,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 02:40:12,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449424668] [2022-11-03 02:40:12,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:12,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:12,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:12,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:40:12,736 INFO L87 Difference]: Start difference. First operand 986 states and 1353 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:12,875 INFO L93 Difference]: Finished difference Result 3518 states and 4889 transitions. [2022-11-03 02:40:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:12,881 INFO L225 Difference]: With dead ends: 3518 [2022-11-03 02:40:12,881 INFO L226 Difference]: Without dead ends: 2620 [2022-11-03 02:40:12,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:40:12,884 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 479 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:12,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 562 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2022-11-03 02:40:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1226. [2022-11-03 02:40:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 1.3689795918367347) internal successors, (1677), 1225 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1677 transitions. [2022-11-03 02:40:12,956 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1677 transitions. Word has length 179 [2022-11-03 02:40:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:12,956 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1677 transitions. [2022-11-03 02:40:12,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1677 transitions. [2022-11-03 02:40:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:12,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:12,959 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:12,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:13,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 02:40:13,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:13,360 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash 596258385, now seen corresponding path program 1 times [2022-11-03 02:40:13,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:13,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566303102] [2022-11-03 02:40:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:13,362 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:40:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:14,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:14,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566303102] [2022-11-03 02:40:14,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566303102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1513585645] [2022-11-03 02:40:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:14,377 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:14,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:40:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:15,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:15,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1513585645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:15,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541914073] [2022-11-03 02:40:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:15,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:15,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:15,403 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:15,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:40:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:15,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541914073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:16,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:16,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 02:40:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060832017] [2022-11-03 02:40:16,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:16,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:40:16,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:40:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:40:16,114 INFO L87 Difference]: Start difference. First operand 1226 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:17,238 INFO L93 Difference]: Finished difference Result 8227 states and 11325 transitions. [2022-11-03 02:40:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:40:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:17,246 INFO L225 Difference]: With dead ends: 8227 [2022-11-03 02:40:17,246 INFO L226 Difference]: Without dead ends: 7089 [2022-11-03 02:40:17,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:40:17,250 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 2416 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2416 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:17,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2416 Valid, 2960 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:40:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2022-11-03 02:40:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 2298. [2022-11-03 02:40:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.3752720940356988) internal successors, (3159), 2297 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3159 transitions. [2022-11-03 02:40:17,371 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3159 transitions. Word has length 179 [2022-11-03 02:40:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:17,371 INFO L495 AbstractCegarLoop]: Abstraction has 2298 states and 3159 transitions. [2022-11-03 02:40:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3159 transitions. [2022-11-03 02:40:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:17,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:17,374 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:17,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:17,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-03 02:40:17,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:40:17,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:17,986 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 953763925, now seen corresponding path program 1 times [2022-11-03 02:40:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:17,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548690845] [2022-11-03 02:40:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:17,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:17,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:17,989 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:18,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:40:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:40:18,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:18,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:18,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:18,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548690845] [2022-11-03 02:40:18,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548690845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:18,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594028396] [2022-11-03 02:40:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:18,840 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:18,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:18,841 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:18,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:40:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:40:19,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:19,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [594028396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:19,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:19,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 02:40:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969542366] [2022-11-03 02:40:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:40:19,308 INFO L87 Difference]: Start difference. First operand 2298 states and 3159 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:19,426 INFO L93 Difference]: Finished difference Result 5378 states and 7441 transitions. [2022-11-03 02:40:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:19,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:19,433 INFO L225 Difference]: With dead ends: 5378 [2022-11-03 02:40:19,434 INFO L226 Difference]: Without dead ends: 3992 [2022-11-03 02:40:19,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:40:19,437 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 601 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:19,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 512 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2022-11-03 02:40:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 2298. [2022-11-03 02:40:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.3709185894645188) internal successors, (3149), 2297 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3149 transitions. [2022-11-03 02:40:19,514 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3149 transitions. Word has length 179 [2022-11-03 02:40:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:19,514 INFO L495 AbstractCegarLoop]: Abstraction has 2298 states and 3149 transitions. [2022-11-03 02:40:19,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3149 transitions. [2022-11-03 02:40:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:19,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:19,517 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:19,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:19,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 02:40:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:19,921 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1539624817, now seen corresponding path program 1 times [2022-11-03 02:40:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357366452] [2022-11-03 02:40:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:19,923 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:40:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:40:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:40:20,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:20,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357366452] [2022-11-03 02:40:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357366452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:20,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:20,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002912300] [2022-11-03 02:40:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:20,338 INFO L87 Difference]: Start difference. First operand 2298 states and 3149 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:20,443 INFO L93 Difference]: Finished difference Result 3706 states and 5071 transitions. [2022-11-03 02:40:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:40:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:20,447 INFO L225 Difference]: With dead ends: 3706 [2022-11-03 02:40:20,447 INFO L226 Difference]: Without dead ends: 2522 [2022-11-03 02:40:20,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:20,450 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 269 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:20,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 519 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2022-11-03 02:40:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2298. [2022-11-03 02:40:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.370047888550283) internal successors, (3147), 2297 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3147 transitions. [2022-11-03 02:40:20,493 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3147 transitions. Word has length 179 [2022-11-03 02:40:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:20,493 INFO L495 AbstractCegarLoop]: Abstraction has 2298 states and 3147 transitions. [2022-11-03 02:40:20,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3147 transitions. [2022-11-03 02:40:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:40:20,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:20,497 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:20,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:20,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:20,713 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 185648019, now seen corresponding path program 1 times [2022-11-03 02:40:20,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:20,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016989078] [2022-11-03 02:40:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:20,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:20,716 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:20,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:40:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:40:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:40:21,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:21,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016989078] [2022-11-03 02:40:21,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016989078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:21,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:21,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:40:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426137426] [2022-11-03 02:40:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:21,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:40:21,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:40:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:40:21,093 INFO L87 Difference]: Start difference. First operand 2298 states and 3147 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:21,152 INFO L93 Difference]: Finished difference Result 4551 states and 6262 transitions. [2022-11-03 02:40:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:40:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2022-11-03 02:40:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:21,157 INFO L225 Difference]: With dead ends: 4551 [2022-11-03 02:40:21,157 INFO L226 Difference]: Without dead ends: 3365 [2022-11-03 02:40:21,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:21,160 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 239 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:21,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 528 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-11-03 02:40:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2250. [2022-11-03 02:40:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.3757225433526012) internal successors, (3094), 2249 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3094 transitions. [2022-11-03 02:40:21,218 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3094 transitions. Word has length 179 [2022-11-03 02:40:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:21,218 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 3094 transitions. [2022-11-03 02:40:21,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3094 transitions. [2022-11-03 02:40:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:21,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:21,224 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:21,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:21,442 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash 450841499, now seen corresponding path program 1 times [2022-11-03 02:40:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:21,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085699513] [2022-11-03 02:40:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:21,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:21,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:21,445 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:21,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:40:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:22,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:22,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085699513] [2022-11-03 02:40:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085699513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:22,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26374231] [2022-11-03 02:40:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:22,297 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:22,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 02:40:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:22,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:40:22,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:22,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26374231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:22,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:22,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:40:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88618002] [2022-11-03 02:40:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:40:22,886 INFO L87 Difference]: Start difference. First operand 2250 states and 3094 transitions. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:22,982 INFO L93 Difference]: Finished difference Result 6538 states and 9034 transitions. [2022-11-03 02:40:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:22,987 INFO L225 Difference]: With dead ends: 6538 [2022-11-03 02:40:22,987 INFO L226 Difference]: Without dead ends: 4376 [2022-11-03 02:40:22,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:40:22,990 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 602 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:22,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 511 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2022-11-03 02:40:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 2250. [2022-11-03 02:40:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.3730546909737662) internal successors, (3088), 2249 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3088 transitions. [2022-11-03 02:40:23,044 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3088 transitions. Word has length 266 [2022-11-03 02:40:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:23,044 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 3088 transitions. [2022-11-03 02:40:23,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3088 transitions. [2022-11-03 02:40:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:23,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:23,049 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:23,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:40:23,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:23,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:23,467 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -335156391, now seen corresponding path program 2 times [2022-11-03 02:40:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140753908] [2022-11-03 02:40:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:23,470 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:23,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:40:23,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:24,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:24,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140753908] [2022-11-03 02:40:24,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140753908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863973242] [2022-11-03 02:40:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:24,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:24,317 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:24,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 02:40:25,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:25,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:40:25,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [863973242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386060185] [2022-11-03 02:40:25,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:40:25,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:25,641 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:25,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 02:40:25,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:40:25,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:40:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 122 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:40:26,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 122 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:40:27,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386060185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:27,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:27,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 02:40:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16860048] [2022-11-03 02:40:27,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:40:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:40:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:40:27,318 INFO L87 Difference]: Start difference. First operand 2250 states and 3088 transitions. Second operand has 31 states, 31 states have (on average 20.06451612903226) internal successors, (622), 31 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:35,587 INFO L93 Difference]: Finished difference Result 43593 states and 59936 transitions. [2022-11-03 02:40:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-03 02:40:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 20.06451612903226) internal successors, (622), 31 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:35,617 INFO L225 Difference]: With dead ends: 43593 [2022-11-03 02:40:35,617 INFO L226 Difference]: Without dead ends: 41311 [2022-11-03 02:40:35,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1743 GetRequests, 1561 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11900 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4646, Invalid=29026, Unknown=0, NotChecked=0, Total=33672 [2022-11-03 02:40:35,626 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 10759 mSDsluCounter, 7931 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10759 SdHoareTripleChecker+Valid, 8329 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:35,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10759 Valid, 8329 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:40:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41311 states. [2022-11-03 02:40:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41311 to 7046. [2022-11-03 02:40:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 1.370333569907736) internal successors, (9654), 7045 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 9654 transitions. [2022-11-03 02:40:35,951 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 9654 transitions. Word has length 266 [2022-11-03 02:40:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:35,952 INFO L495 AbstractCegarLoop]: Abstraction has 7046 states and 9654 transitions. [2022-11-03 02:40:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 20.06451612903226) internal successors, (622), 31 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 9654 transitions. [2022-11-03 02:40:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:35,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:35,964 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:35,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:36,584 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1688735255, now seen corresponding path program 1 times [2022-11-03 02:40:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:36,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927615705] [2022-11-03 02:40:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:36,589 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:36,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:40:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:40:37,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 199 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:40:37,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927615705] [2022-11-03 02:40:37,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927615705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1011822924] [2022-11-03 02:40:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:37,638 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:37,639 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:37,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-03 02:40:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 02:40:38,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1011822924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:38,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 02:40:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394088697] [2022-11-03 02:40:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:40:38,209 INFO L87 Difference]: Start difference. First operand 7046 states and 9654 transitions. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:38,434 INFO L93 Difference]: Finished difference Result 20786 states and 28546 transitions. [2022-11-03 02:40:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:38,444 INFO L225 Difference]: With dead ends: 20786 [2022-11-03 02:40:38,444 INFO L226 Difference]: Without dead ends: 13828 [2022-11-03 02:40:38,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:40:38,450 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 580 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:38,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 521 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13828 states. [2022-11-03 02:40:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13828 to 7202. [2022-11-03 02:40:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 7201 states have (on average 1.365643660602694) internal successors, (9834), 7201 states have internal predecessors, (9834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 9834 transitions. [2022-11-03 02:40:38,683 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 9834 transitions. Word has length 266 [2022-11-03 02:40:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:38,684 INFO L495 AbstractCegarLoop]: Abstraction has 7202 states and 9834 transitions. [2022-11-03 02:40:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 9834 transitions. [2022-11-03 02:40:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:38,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:38,697 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:38,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:38,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 02:40:39,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:39,102 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2117903401, now seen corresponding path program 1 times [2022-11-03 02:40:39,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151744322] [2022-11-03 02:40:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:39,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:39,105 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:39,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:40:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:40,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151744322] [2022-11-03 02:40:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151744322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [401901398] [2022-11-03 02:40:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:40,042 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:40,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 02:40:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:40,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:40:40,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:40,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [401901398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:40,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:40,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:40:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062653266] [2022-11-03 02:40:40,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:40,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:40,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:40:40,732 INFO L87 Difference]: Start difference. First operand 7202 states and 9834 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:40,921 INFO L93 Difference]: Finished difference Result 23372 states and 32020 transitions. [2022-11-03 02:40:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:40,935 INFO L225 Difference]: With dead ends: 23372 [2022-11-03 02:40:40,935 INFO L226 Difference]: Without dead ends: 16258 [2022-11-03 02:40:40,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:40:40,943 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 606 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:40,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 520 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16258 states. [2022-11-03 02:40:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16258 to 9704. [2022-11-03 02:40:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9704 states, 9703 states have (on average 1.3616407296712356) internal successors, (13212), 9703 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9704 states to 9704 states and 13212 transitions. [2022-11-03 02:40:41,242 INFO L78 Accepts]: Start accepts. Automaton has 9704 states and 13212 transitions. Word has length 266 [2022-11-03 02:40:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:41,243 INFO L495 AbstractCegarLoop]: Abstraction has 9704 states and 13212 transitions. [2022-11-03 02:40:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9704 states and 13212 transitions. [2022-11-03 02:40:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:41,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:41,259 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:41,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:41,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:41,673 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1807210903, now seen corresponding path program 1 times [2022-11-03 02:40:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106235368] [2022-11-03 02:40:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:41,677 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:40:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:42,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106235368] [2022-11-03 02:40:42,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106235368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779981217] [2022-11-03 02:40:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:42,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:42,927 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:42,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:40:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:40:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:40:43,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:43,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779981217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:43,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:40:43,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:40:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911166866] [2022-11-03 02:40:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:40:43,720 INFO L87 Difference]: Start difference. First operand 9704 states and 13212 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:43,981 INFO L93 Difference]: Finished difference Result 25970 states and 35398 transitions. [2022-11-03 02:40:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:43,994 INFO L225 Difference]: With dead ends: 25970 [2022-11-03 02:40:43,994 INFO L226 Difference]: Without dead ends: 16354 [2022-11-03 02:40:43,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:40:44,000 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 604 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:44,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 519 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2022-11-03 02:40:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9800. [2022-11-03 02:40:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9800 states, 9799 states have (on average 1.3531993060516379) internal successors, (13260), 9799 states have internal predecessors, (13260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9800 states to 9800 states and 13260 transitions. [2022-11-03 02:40:44,232 INFO L78 Accepts]: Start accepts. Automaton has 9800 states and 13260 transitions. Word has length 266 [2022-11-03 02:40:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:44,233 INFO L495 AbstractCegarLoop]: Abstraction has 9800 states and 13260 transitions. [2022-11-03 02:40:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9800 states and 13260 transitions. [2022-11-03 02:40:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:40:44,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:44,250 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:44,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:44,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:44,655 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1875851433, now seen corresponding path program 1 times [2022-11-03 02:40:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:44,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901372772] [2022-11-03 02:40:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:44,658 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:44,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:40:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:45,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:45,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901372772] [2022-11-03 02:40:45,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901372772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485025022] [2022-11-03 02:40:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:45,833 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:45,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 02:40:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:40:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:47,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:40:47,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485025022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:47,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657202378] [2022-11-03 02:40:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:47,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:47,353 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:47,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-03 02:40:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:40:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 108 proven. 128 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:40:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 108 proven. 128 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:40:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657202378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:49,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:49,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 02:40:49,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867858152] [2022-11-03 02:40:49,291 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:40:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:49,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:40:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:40:49,296 INFO L87 Difference]: Start difference. First operand 9800 states and 13260 transitions. Second operand has 31 states, 31 states have (on average 20.451612903225808) internal successors, (634), 31 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:59,302 INFO L93 Difference]: Finished difference Result 114391 states and 153725 transitions. [2022-11-03 02:40:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-03 02:40:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 20.451612903225808) internal successors, (634), 31 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:40:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:59,395 INFO L225 Difference]: With dead ends: 114391 [2022-11-03 02:40:59,395 INFO L226 Difference]: Without dead ends: 104247 [2022-11-03 02:40:59,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1743 GetRequests, 1561 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11921 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4646, Invalid=29026, Unknown=0, NotChecked=0, Total=33672 [2022-11-03 02:40:59,425 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 8948 mSDsluCounter, 14201 mSDsCounter, 0 mSdLazyCounter, 3708 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8948 SdHoareTripleChecker+Valid, 15106 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 3708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8948 Valid, 15106 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 3708 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:40:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104247 states. [2022-11-03 02:41:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104247 to 21792. [2022-11-03 02:41:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21792 states, 21791 states have (on average 1.3409205635354045) internal successors, (29220), 21791 states have internal predecessors, (29220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21792 states to 21792 states and 29220 transitions. [2022-11-03 02:41:00,267 INFO L78 Accepts]: Start accepts. Automaton has 21792 states and 29220 transitions. Word has length 266 [2022-11-03 02:41:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:00,268 INFO L495 AbstractCegarLoop]: Abstraction has 21792 states and 29220 transitions. [2022-11-03 02:41:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 20.451612903225808) internal successors, (634), 31 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21792 states and 29220 transitions. [2022-11-03 02:41:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:00,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:00,302 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:00,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:00,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 02:41:00,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:00,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:00,911 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1325671443, now seen corresponding path program 1 times [2022-11-03 02:41:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:00,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016228230] [2022-11-03 02:41:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:00,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:00,914 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:00,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 02:41:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:01,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:41:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:41:01,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 209 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:41:01,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:01,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016228230] [2022-11-03 02:41:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016228230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:01,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663116966] [2022-11-03 02:41:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:01,967 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:01,968 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:01,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 02:41:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:41:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:41:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 209 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:41:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663116966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196438578] [2022-11-03 02:41:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:03,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:03,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:03,345 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:03,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 02:41:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:03,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:41:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 104 proven. 6 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-03 02:41:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 100 proven. 18 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-03 02:41:04,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196438578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:04,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:04,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 8] total 19 [2022-11-03 02:41:04,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479453452] [2022-11-03 02:41:04,463 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:04,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:41:04,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:41:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:41:04,465 INFO L87 Difference]: Start difference. First operand 21792 states and 29220 transitions. Second operand has 19 states, 19 states have (on average 21.789473684210527) internal successors, (414), 19 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:08,251 INFO L93 Difference]: Finished difference Result 126657 states and 168259 transitions. [2022-11-03 02:41:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-03 02:41:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 21.789473684210527) internal successors, (414), 19 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:08,333 INFO L225 Difference]: With dead ends: 126657 [2022-11-03 02:41:08,333 INFO L226 Difference]: Without dead ends: 104953 [2022-11-03 02:41:08,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1572 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1321, Invalid=4531, Unknown=0, NotChecked=0, Total=5852 [2022-11-03 02:41:08,355 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 2852 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2852 SdHoareTripleChecker+Valid, 4722 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:08,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2852 Valid, 4722 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:41:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104953 states. [2022-11-03 02:41:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104953 to 26122. [2022-11-03 02:41:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 1.3305386470655793) internal successors, (34755), 26121 states have internal predecessors, (34755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 34755 transitions. [2022-11-03 02:41:09,356 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 34755 transitions. Word has length 266 [2022-11-03 02:41:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:09,357 INFO L495 AbstractCegarLoop]: Abstraction has 26122 states and 34755 transitions. [2022-11-03 02:41:09,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.789473684210527) internal successors, (414), 19 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 34755 transitions. [2022-11-03 02:41:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:09,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:09,380 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:09,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 02:41:09,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:09,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:09,981 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1927327841, now seen corresponding path program 1 times [2022-11-03 02:41:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869826894] [2022-11-03 02:41:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:09,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:09,984 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:09,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 02:41:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:41:10,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:41:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:41:11,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869826894] [2022-11-03 02:41:11,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869826894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:11,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1607281897] [2022-11-03 02:41:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:11,370 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:11,371 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:11,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 02:41:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:41:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:41:12,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:41:13,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1607281897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708222880] [2022-11-03 02:41:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:13,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:13,350 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-03 02:41:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:41:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:41:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:41:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708222880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:14,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:14,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 8, 8] total 28 [2022-11-03 02:41:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287846889] [2022-11-03 02:41:14,680 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:14,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:41:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:41:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:41:14,683 INFO L87 Difference]: Start difference. First operand 26122 states and 34755 transitions. Second operand has 28 states, 28 states have (on average 19.928571428571427) internal successors, (558), 28 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:23,684 INFO L93 Difference]: Finished difference Result 347877 states and 462434 transitions. [2022-11-03 02:41:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-03 02:41:23,685 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 19.928571428571427) internal successors, (558), 28 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:24,149 INFO L225 Difference]: With dead ends: 347877 [2022-11-03 02:41:24,150 INFO L226 Difference]: Without dead ends: 321843 [2022-11-03 02:41:24,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1682 GetRequests, 1564 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4867 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2877, Invalid=11403, Unknown=0, NotChecked=0, Total=14280 [2022-11-03 02:41:24,236 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 6045 mSDsluCounter, 6992 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6045 SdHoareTripleChecker+Valid, 7199 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:24,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6045 Valid, 7199 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:41:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321843 states. [2022-11-03 02:41:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321843 to 79754. [2022-11-03 02:41:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79754 states, 79753 states have (on average 1.3218687698268403) internal successors, (105423), 79753 states have internal predecessors, (105423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79754 states to 79754 states and 105423 transitions. [2022-11-03 02:41:27,931 INFO L78 Accepts]: Start accepts. Automaton has 79754 states and 105423 transitions. Word has length 266 [2022-11-03 02:41:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:27,931 INFO L495 AbstractCegarLoop]: Abstraction has 79754 states and 105423 transitions. [2022-11-03 02:41:27,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 19.928571428571427) internal successors, (558), 28 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79754 states and 105423 transitions. [2022-11-03 02:41:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:27,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:27,977 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:27,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:28,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:28,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:28,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:28,584 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1591027171, now seen corresponding path program 1 times [2022-11-03 02:41:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:28,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159174678] [2022-11-03 02:41:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:28,587 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:28,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:41:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:29,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:30,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:30,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159174678] [2022-11-03 02:41:30,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159174678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:30,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081662910] [2022-11-03 02:41:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:30,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:30,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:30,318 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:30,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 02:41:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:30,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-03 02:41:31,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:31,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081662910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:31,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:31,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:41:31,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879410751] [2022-11-03 02:41:31,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:31,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:31,149 INFO L87 Difference]: Start difference. First operand 79754 states and 105423 transitions. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:32,096 INFO L93 Difference]: Finished difference Result 118716 states and 157085 transitions. [2022-11-03 02:41:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:32,137 INFO L225 Difference]: With dead ends: 118716 [2022-11-03 02:41:32,137 INFO L226 Difference]: Without dead ends: 78882 [2022-11-03 02:41:32,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:32,152 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 405 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:32,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 576 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78882 states. [2022-11-03 02:41:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78882 to 61626. [2022-11-03 02:41:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61626 states, 61625 states have (on average 1.3009006085192698) internal successors, (80168), 61625 states have internal predecessors, (80168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61626 states to 61626 states and 80168 transitions. [2022-11-03 02:41:33,559 INFO L78 Accepts]: Start accepts. Automaton has 61626 states and 80168 transitions. Word has length 266 [2022-11-03 02:41:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:33,560 INFO L495 AbstractCegarLoop]: Abstraction has 61626 states and 80168 transitions. [2022-11-03 02:41:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 61626 states and 80168 transitions. [2022-11-03 02:41:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:33,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:33,581 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:33,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:33,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-11-03 02:41:33,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:33,999 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash -337546145, now seen corresponding path program 1 times [2022-11-03 02:41:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051502911] [2022-11-03 02:41:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:34,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:34,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:34,002 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:34,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:41:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:41:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:35,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051502911] [2022-11-03 02:41:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051502911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898061756] [2022-11-03 02:41:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:35,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:35,791 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:35,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 02:41:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:41:36,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:36,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1898061756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:36,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:36,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:41:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229300411] [2022-11-03 02:41:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:36,468 INFO L87 Difference]: Start difference. First operand 61626 states and 80168 transitions. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:37,746 INFO L93 Difference]: Finished difference Result 165914 states and 216092 transitions. [2022-11-03 02:41:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:37,846 INFO L225 Difference]: With dead ends: 165914 [2022-11-03 02:41:37,846 INFO L226 Difference]: Without dead ends: 104376 [2022-11-03 02:41:37,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:37,884 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 416 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:37,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 575 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104376 states. [2022-11-03 02:41:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104376 to 61626. [2022-11-03 02:41:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61626 states, 61625 states have (on average 1.2990507099391482) internal successors, (80054), 61625 states have internal predecessors, (80054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61626 states to 61626 states and 80054 transitions. [2022-11-03 02:41:39,661 INFO L78 Accepts]: Start accepts. Automaton has 61626 states and 80054 transitions. Word has length 266 [2022-11-03 02:41:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:39,661 INFO L495 AbstractCegarLoop]: Abstraction has 61626 states and 80054 transitions. [2022-11-03 02:41:39,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 61626 states and 80054 transitions. [2022-11-03 02:41:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:39,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:39,674 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:39,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:39,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:40,075 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1645195807, now seen corresponding path program 1 times [2022-11-03 02:41:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151959045] [2022-11-03 02:41:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:40,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:40,081 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:40,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:41:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:41:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:41,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:41,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151959045] [2022-11-03 02:41:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151959045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114681873] [2022-11-03 02:41:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:41,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:41,840 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:41,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 02:41:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 02:41:42,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114681873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:42,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:42,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:41:42,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010091192] [2022-11-03 02:41:42,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:42,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:42,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:42,462 INFO L87 Difference]: Start difference. First operand 61626 states and 80054 transitions. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:43,810 INFO L93 Difference]: Finished difference Result 166046 states and 215996 transitions. [2022-11-03 02:41:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:43,899 INFO L225 Difference]: With dead ends: 166046 [2022-11-03 02:41:43,900 INFO L226 Difference]: Without dead ends: 104508 [2022-11-03 02:41:43,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:43,929 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 414 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:43,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 574 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104508 states. [2022-11-03 02:41:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104508 to 61626. [2022-11-03 02:41:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61626 states, 61625 states have (on average 1.2972008113590263) internal successors, (79940), 61625 states have internal predecessors, (79940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61626 states to 61626 states and 79940 transitions. [2022-11-03 02:41:45,402 INFO L78 Accepts]: Start accepts. Automaton has 61626 states and 79940 transitions. Word has length 266 [2022-11-03 02:41:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:45,402 INFO L495 AbstractCegarLoop]: Abstraction has 61626 states and 79940 transitions. [2022-11-03 02:41:45,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 61626 states and 79940 transitions. [2022-11-03 02:41:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:45,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:45,419 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:45,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 02:41:45,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-03 02:41:45,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:45,820 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1446141919, now seen corresponding path program 1 times [2022-11-03 02:41:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773935425] [2022-11-03 02:41:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:45,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:45,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:45,822 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:45,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:41:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:41:46,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:47,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:47,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773935425] [2022-11-03 02:41:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773935425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760442004] [2022-11-03 02:41:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:47,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:47,440 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:47,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-03 02:41:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:41:48,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760442004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:48,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:48,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:41:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503826711] [2022-11-03 02:41:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:48,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:48,275 INFO L87 Difference]: Start difference. First operand 61626 states and 79940 transitions. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:49,798 INFO L93 Difference]: Finished difference Result 166442 states and 216296 transitions. [2022-11-03 02:41:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:49,918 INFO L225 Difference]: With dead ends: 166442 [2022-11-03 02:41:49,918 INFO L226 Difference]: Without dead ends: 104904 [2022-11-03 02:41:49,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:49,954 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 414 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:49,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 573 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104904 states. [2022-11-03 02:41:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104904 to 61626. [2022-11-03 02:41:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61626 states, 61625 states have (on average 1.2953509127789047) internal successors, (79826), 61625 states have internal predecessors, (79826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61626 states to 61626 states and 79826 transitions. [2022-11-03 02:41:51,719 INFO L78 Accepts]: Start accepts. Automaton has 61626 states and 79826 transitions. Word has length 266 [2022-11-03 02:41:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:51,719 INFO L495 AbstractCegarLoop]: Abstraction has 61626 states and 79826 transitions. [2022-11-03 02:41:51,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 61626 states and 79826 transitions. [2022-11-03 02:41:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:51,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:51,735 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:51,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:41:51,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:52,136 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash 240803231, now seen corresponding path program 1 times [2022-11-03 02:41:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:52,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599379354] [2022-11-03 02:41:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:52,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:52,139 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:52,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:41:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:41:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:53,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:41:54,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599379354] [2022-11-03 02:41:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599379354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:54,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752739213] [2022-11-03 02:41:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:54,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:54,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:54,269 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:54,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 02:41:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:54,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 02:41:55,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752739213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:55,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:55,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:41:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800891288] [2022-11-03 02:41:55,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:55,018 INFO L87 Difference]: Start difference. First operand 61626 states and 79826 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:55,614 INFO L93 Difference]: Finished difference Result 121752 states and 158149 transitions. [2022-11-03 02:41:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:41:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:55,671 INFO L225 Difference]: With dead ends: 121752 [2022-11-03 02:41:55,671 INFO L226 Difference]: Without dead ends: 60214 [2022-11-03 02:41:55,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:41:55,703 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 407 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:55,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 575 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2022-11-03 02:41:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 40136. [2022-11-03 02:41:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40136 states, 40135 states have (on average 1.2978198579793199) internal successors, (52088), 40135 states have internal predecessors, (52088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40136 states to 40136 states and 52088 transitions. [2022-11-03 02:41:57,050 INFO L78 Accepts]: Start accepts. Automaton has 40136 states and 52088 transitions. Word has length 266 [2022-11-03 02:41:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:57,050 INFO L495 AbstractCegarLoop]: Abstraction has 40136 states and 52088 transitions. [2022-11-03 02:41:57,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 40136 states and 52088 transitions. [2022-11-03 02:41:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:41:57,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:57,065 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:57,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:57,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 02:41:57,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:57,466 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1489345557, now seen corresponding path program 1 times [2022-11-03 02:41:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:57,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100388924] [2022-11-03 02:41:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:57,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:57,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:57,469 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:41:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:41:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 40 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:41:58,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 40 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:41:59,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100388924] [2022-11-03 02:41:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100388924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096966057] [2022-11-03 02:41:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:59,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:59,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:59,368 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 02:42:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 132 proven. 112 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:42:00,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 132 proven. 112 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:42:01,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096966057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:01,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708321770] [2022-11-03 02:42:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:01,462 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:01,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-03 02:42:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:42:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:42:02,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:42:02,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708321770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:02,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:02,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8, 8, 7, 7] total 35 [2022-11-03 02:42:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706159761] [2022-11-03 02:42:02,418 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:42:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:42:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:42:02,421 INFO L87 Difference]: Start difference. First operand 40136 states and 52088 transitions. Second operand has 35 states, 35 states have (on average 19.314285714285713) internal successors, (676), 35 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:12,763 INFO L93 Difference]: Finished difference Result 317254 states and 411090 transitions. [2022-11-03 02:42:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-03 02:42:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 19.314285714285713) internal successors, (676), 35 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:42:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:12,993 INFO L225 Difference]: With dead ends: 317254 [2022-11-03 02:42:12,993 INFO L226 Difference]: Without dead ends: 277202 [2022-11-03 02:42:13,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1719 GetRequests, 1555 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9075 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4265, Invalid=22467, Unknown=0, NotChecked=0, Total=26732 [2022-11-03 02:42:13,037 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 15108 mSDsluCounter, 4678 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15108 SdHoareTripleChecker+Valid, 4965 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:13,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15108 Valid, 4965 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:42:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277202 states. [2022-11-03 02:42:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277202 to 122974. [2022-11-03 02:42:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122974 states, 122973 states have (on average 1.2853309263008954) internal successors, (158061), 122973 states have internal predecessors, (158061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122974 states to 122974 states and 158061 transitions. [2022-11-03 02:42:17,176 INFO L78 Accepts]: Start accepts. Automaton has 122974 states and 158061 transitions. Word has length 266 [2022-11-03 02:42:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:17,177 INFO L495 AbstractCegarLoop]: Abstraction has 122974 states and 158061 transitions. [2022-11-03 02:42:17,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 19.314285714285713) internal successors, (676), 35 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 122974 states and 158061 transitions. [2022-11-03 02:42:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:42:17,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:17,191 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:17,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 02:42:17,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:17,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-03 02:42:17,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:17,794 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1998464667, now seen corresponding path program 1 times [2022-11-03 02:42:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254664631] [2022-11-03 02:42:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:17,796 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:17,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 02:42:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:42:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:42:18,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 215 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:42:18,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254664631] [2022-11-03 02:42:18,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254664631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368409955] [2022-11-03 02:42:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:18,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:18,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:18,819 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:18,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d8ce65a-e13b-449b-83fc-f7e0832768e1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-03 02:42:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:42:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-03 02:42:19,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368409955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:19,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:42:19,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 02:42:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446803353] [2022-11-03 02:42:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:19,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:19,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:42:19,459 INFO L87 Difference]: Start difference. First operand 122974 states and 158061 transitions. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)