./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/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_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/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_879dd7e0-a531-44cc-937d-83b962ec8e7e/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 1b27e5745b5f05e947019d23e2bd6132de679912fee429e880b6bc149e2579c3 --- 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 02:50:32,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:50:32,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:50:32,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:50:32,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:50:32,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:50:32,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:50:32,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:50:32,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:50:32,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:50:32,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:50:32,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:50:32,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:50:32,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:50:32,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:50:32,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:50:32,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:50:32,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:50:32,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:50:32,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:50:32,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:50:32,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:50:32,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:50:32,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:50:32,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:50:32,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:50:32,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:50:32,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:50:32,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:50:32,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:50:32,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:50:32,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:50:32,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:50:32,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:50:32,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:50:32,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:50:32,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:50:32,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:50:32,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:50:32,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:50:32,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:50:32,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:50:32,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:50:32,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:50:32,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:50:32,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:50:32,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:50:32,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:50:32,889 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:50:32,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:50:32,889 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:50:32,889 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:50:32,890 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:50:32,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:50:32,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:50:32,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:50:32,891 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:50:32,892 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:50:32,892 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:50:32,892 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:50:32,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:50:32,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:50:32,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:50:32,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:50:32,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:50:32,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:50:32,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:50:32,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:50:32,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:50:32,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:50:32,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:50:32,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:32,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:50:32,898 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:50:32,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:50:32,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:50:32,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:50:32,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:50:32,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:50:32,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:50:32,900 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b27e5745b5f05e947019d23e2bd6132de679912fee429e880b6bc149e2579c3 [2022-11-03 02:50:33,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:50:33,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:50:33,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:50:33,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:50:33,306 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:50:33,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:33,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/c6c1622a1/4fa9b3157f1645c8b23fca1d264838c1/FLAG2a0b5e907 [2022-11-03 02:50:33,843 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:50:33,850 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:33,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/c6c1622a1/4fa9b3157f1645c8b23fca1d264838c1/FLAG2a0b5e907 [2022-11-03 02:50:34,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/c6c1622a1/4fa9b3157f1645c8b23fca1d264838c1 [2022-11-03 02:50:34,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:50:34,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:50:34,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:34,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:50:34,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:50:34,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e20bd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34, skipping insertion in model container [2022-11-03 02:50:34,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:50:34,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:50:34,526 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c[1107,1120] [2022-11-03 02:50:34,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:34,593 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:50:34,611 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c[1107,1120] [2022-11-03 02:50:34,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:34,670 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:50:34,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34 WrapperNode [2022-11-03 02:50:34,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:34,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:34,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:50:34,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:50:34,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,732 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 250 [2022-11-03 02:50:34,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:34,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:50:34,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:50:34,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:50:34,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:50:34,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:50:34,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:50:34,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:50:34,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (1/1) ... [2022-11-03 02:50:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:34,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:50:34,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:50:34,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:50:34,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:50:35,037 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:50:35,040 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:35,465 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:50:35,691 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:50:35,691 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:50:35,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:35 BoogieIcfgContainer [2022-11-03 02:50:35,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:50:35,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:50:35,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:50:35,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:50:35,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:50:34" (1/3) ... [2022-11-03 02:50:35,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e4bf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:35, skipping insertion in model container [2022-11-03 02:50:35,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:34" (2/3) ... [2022-11-03 02:50:35,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e4bf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:35, skipping insertion in model container [2022-11-03 02:50:35,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:35" (3/3) ... [2022-11-03 02:50:35,703 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:35,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:50:35,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:50:35,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:50:35,780 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;@1d8ae072, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:50:35,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:50:35,785 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 02:50:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:50:35,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:35,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:50:35,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 4538260, now seen corresponding path program 1 times [2022-11-03 02:50:35,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:35,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801452449] [2022-11-03 02:50:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:50:36,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:50:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:50:36,317 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:50:36,318 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:50:36,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:50:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:50:36,326 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:50:36,330 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:50:36,346 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:50:36,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:50:36 BoogieIcfgContainer [2022-11-03 02:50:36,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:50:36,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:50:36,354 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:50:36,354 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:50:36,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:35" (3/4) ... [2022-11-03 02:50:36,358 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:50:36,358 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:50:36,359 INFO L158 Benchmark]: Toolchain (without parser) took 2145.67ms. Allocated memory is still 132.1MB. Free memory was 93.9MB in the beginning and 101.7MB in the end (delta: -7.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:50:36,360 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 132.1MB. Free memory is still 110.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:50:36,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 452.31ms. Allocated memory is still 132.1MB. Free memory was 93.8MB in the beginning and 104.6MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:50:36,361 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.64ms. Allocated memory is still 132.1MB. Free memory was 104.6MB in the beginning and 100.8MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:50:36,362 INFO L158 Benchmark]: Boogie Preprocessor took 40.03ms. Allocated memory is still 132.1MB. Free memory was 100.8MB in the beginning and 98.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:50:36,362 INFO L158 Benchmark]: RCFGBuilder took 920.83ms. Allocated memory is still 132.1MB. Free memory was 98.3MB in the beginning and 82.4MB in the end (delta: 15.9MB). Peak memory consumption was 50.8MB. Max. memory is 16.1GB. [2022-11-03 02:50:36,363 INFO L158 Benchmark]: TraceAbstraction took 657.26ms. Allocated memory is still 132.1MB. Free memory was 81.8MB in the beginning and 102.1MB in the end (delta: -20.3MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2022-11-03 02:50:36,363 INFO L158 Benchmark]: Witness Printer took 4.53ms. Allocated memory is still 132.1MB. Free memory was 102.1MB in the beginning and 101.7MB in the end (delta: 396.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:50:36,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 132.1MB. Free memory is still 110.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 452.31ms. Allocated memory is still 132.1MB. Free memory was 93.8MB in the beginning and 104.6MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.64ms. Allocated memory is still 132.1MB. Free memory was 104.6MB in the beginning and 100.8MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.03ms. Allocated memory is still 132.1MB. Free memory was 100.8MB in the beginning and 98.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 920.83ms. Allocated memory is still 132.1MB. Free memory was 98.3MB in the beginning and 82.4MB in the end (delta: 15.9MB). Peak memory consumption was 50.8MB. Max. memory is 16.1GB. * TraceAbstraction took 657.26ms. Allocated memory is still 132.1MB. Free memory was 81.8MB in the beginning and 102.1MB in the end (delta: -20.3MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. * Witness Printer took 4.53ms. Allocated memory is still 132.1MB. Free memory was 102.1MB in the beginning and 101.7MB in the end (delta: 396.6kB). 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 86, overapproximation of bitwiseOr at line 84, overapproximation of bitwiseAnd at line 71. 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_8 mask_SORT_8 = (SORT_8)-1 >> (sizeof(SORT_8) * 8 - 32); [L29] const SORT_8 msb_SORT_8 = (SORT_8)1 << (32 - 1); [L31] const SORT_1 var_5 = 0; [L32] const SORT_8 var_10 = 0; [L33] const SORT_1 var_19 = 1; [L35] SORT_1 input_2; [L36] SORT_1 input_3; [L37] SORT_1 input_4; [L38] SORT_1 input_34; [L39] SORT_1 input_37; [L40] SORT_1 input_41; [L41] SORT_1 input_50; [L42] SORT_1 input_53; [L43] SORT_1 input_57; [L45] SORT_1 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L51] SORT_1 init_7_arg_1 = var_5; [L52] state_6 = init_7_arg_1 [L53] SORT_1 init_13_arg_1 = var_5; [L54] state_12 = init_13_arg_1 [L55] SORT_1 init_27_arg_1 = var_5; [L56] state_26 = init_27_arg_1 VAL [init_13_arg_1=0, init_27_arg_1=0, init_7_arg_1=0, mask_SORT_1=1, mask_SORT_8=4294967295, msb_SORT_1=1, msb_SORT_8=2147483648, state_12=0, state_24=0, state_25=1, state_26=0, state_6=0, var_10=0, var_19=1, var_5=0] [L59] input_2 = __VERIFIER_nondet_uchar() [L60] input_3 = __VERIFIER_nondet_uchar() [L61] input_4 = __VERIFIER_nondet_uchar() [L62] input_34 = __VERIFIER_nondet_uchar() [L63] input_37 = __VERIFIER_nondet_uchar() [L64] input_41 = __VERIFIER_nondet_uchar() [L65] input_50 = __VERIFIER_nondet_uchar() [L66] input_53 = __VERIFIER_nondet_uchar() [L67] input_57 = __VERIFIER_nondet_uchar() [L70] SORT_1 var_9_arg_0 = state_6; [L71] var_9_arg_0 = var_9_arg_0 & mask_SORT_1 [L72] SORT_8 var_9 = var_9_arg_0; [L73] SORT_8 var_11_arg_0 = var_9; [L74] SORT_8 var_11_arg_1 = var_10; [L75] SORT_1 var_11 = var_11_arg_0 == var_11_arg_1; [L76] SORT_1 var_14_arg_0 = state_12; [L77] var_14_arg_0 = var_14_arg_0 & mask_SORT_1 [L78] SORT_8 var_14 = var_14_arg_0; [L79] SORT_8 var_15_arg_0 = var_14; [L80] SORT_8 var_15_arg_1 = var_10; [L81] SORT_1 var_15 = var_15_arg_0 == var_15_arg_1; [L82] SORT_1 var_16_arg_0 = var_11; [L83] SORT_1 var_16_arg_1 = var_15; [L84] SORT_1 var_16 = var_16_arg_0 | var_16_arg_1; [L85] SORT_1 var_20_arg_0 = var_16; [L86] SORT_1 var_20 = ~var_20_arg_0; [L87] SORT_1 var_21_arg_0 = var_19; [L88] SORT_1 var_21_arg_1 = var_20; [L89] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L90] var_21 = var_21 & mask_SORT_1 [L91] SORT_1 bad_22_arg_0 = var_21; [L92] CALL __VERIFIER_assert(!(bad_22_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:50:36,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/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_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/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_879dd7e0-a531-44cc-937d-83b962ec8e7e/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 1b27e5745b5f05e947019d23e2bd6132de679912fee429e880b6bc149e2579c3 --- 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 02:50:38,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:50:38,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:50:38,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:50:38,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:50:38,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:50:38,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:50:38,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:50:38,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:50:38,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:50:38,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:50:38,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:50:38,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:50:38,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:50:38,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:50:38,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:50:38,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:50:38,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:50:38,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:50:38,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:50:38,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:50:38,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:50:38,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:50:38,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:50:38,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:50:38,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:50:38,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:50:38,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:50:38,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:50:38,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:50:38,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:50:38,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:50:38,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:50:38,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:50:38,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:50:38,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:50:38,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:50:38,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:50:38,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:50:38,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:50:38,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:50:38,993 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:50:39,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:50:39,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:50:39,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:50:39,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:50:39,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:50:39,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:50:39,037 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:50:39,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:50:39,037 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:50:39,037 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:50:39,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:50:39,038 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:50:39,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:50:39,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:50:39,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:50:39,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:50:39,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:50:39,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:50:39,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:50:39,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:50:39,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:50:39,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:39,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:50:39,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:50:39,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:50:39,043 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:50:39,044 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:39,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:50:39,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:50:39,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:50:39,045 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b27e5745b5f05e947019d23e2bd6132de679912fee429e880b6bc149e2579c3 [2022-11-03 02:50:39,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:50:39,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:50:39,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:50:39,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:50:39,492 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:50:39,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:39,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/7d1c3c4c6/ce0c713dcc054dbfbe85b63597ecdb51/FLAG728a8b76d [2022-11-03 02:50:40,157 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:50:40,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:40,166 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/7d1c3c4c6/ce0c713dcc054dbfbe85b63597ecdb51/FLAG728a8b76d [2022-11-03 02:50:40,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/data/7d1c3c4c6/ce0c713dcc054dbfbe85b63597ecdb51 [2022-11-03 02:50:40,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:50:40,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:50:40,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:40,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:50:40,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:50:40,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12503b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40, skipping insertion in model container [2022-11-03 02:50:40,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:50:40,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:50:40,702 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c[1107,1120] [2022-11-03 02:50:40,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:40,819 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:50:40,831 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_879dd7e0-a531-44cc-937d-83b962ec8e7e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Rrobin.c[1107,1120] [2022-11-03 02:50:40,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:40,877 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:50:40,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40 WrapperNode [2022-11-03 02:50:40,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:40,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:40,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:50:40,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:50:40,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,931 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 250 [2022-11-03 02:50:40,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:40,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:50:40,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:50:40,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:50:40,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:50:40,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:50:40,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:50:40,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:50:40,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (1/1) ... [2022-11-03 02:50:40,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:41,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:50:41,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:50:41,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:50:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:50:41,172 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:50:41,175 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:41,639 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:50:41,647 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:50:41,647 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:50:41,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:41 BoogieIcfgContainer [2022-11-03 02:50:41,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:50:41,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:50:41,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:50:41,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:50:41,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:50:40" (1/3) ... [2022-11-03 02:50:41,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556c6a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:41, skipping insertion in model container [2022-11-03 02:50:41,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:40" (2/3) ... [2022-11-03 02:50:41,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556c6a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:41, skipping insertion in model container [2022-11-03 02:50:41,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:41" (3/3) ... [2022-11-03 02:50:41,677 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Rrobin.c [2022-11-03 02:50:41,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:50:41,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:50:41,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:50:41,755 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;@12023a76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:50:41,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:50:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:50:41,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:41,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:50:41,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:41,773 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:50:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693101395] [2022-11-03 02:50:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:41,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:50:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:41,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:50:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:42,252 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 02:50:42,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:42,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:42,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693101395] [2022-11-03 02:50:42,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693101395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:42,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:42,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:50:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972470708] [2022-11-03 02:50:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:42,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:50:42,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:50:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:50:42,321 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:50:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:42,446 INFO L93 Difference]: Finished difference Result 98 states and 147 transitions. [2022-11-03 02:50:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:50:42,449 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 02:50:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:42,468 INFO L225 Difference]: With dead ends: 98 [2022-11-03 02:50:42,468 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:50:42,471 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 02:50:42,474 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:42,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 125 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:50:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:50:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2022-11-03 02:50:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2022-11-03 02:50:42,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 5 [2022-11-03 02:50:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:42,528 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2022-11-03 02:50:42,528 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 02:50:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2022-11-03 02:50:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:42,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:42,530 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] [2022-11-03 02:50:42,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:42,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1126224685, now seen corresponding path program 1 times [2022-11-03 02:50:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:42,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054287336] [2022-11-03 02:50:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:42,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:42,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:42,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:50:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:50:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:43,089 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 02:50:43,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:43,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054287336] [2022-11-03 02:50:43,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054287336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:43,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:43,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:50:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134395106] [2022-11-03 02:50:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:43,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:43,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:43,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:43,103 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:43,230 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2022-11-03 02:50:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:50:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:43,232 INFO L225 Difference]: With dead ends: 128 [2022-11-03 02:50:43,234 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:50:43,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:50:43,237 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 116 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:43,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 326 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 02:50:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:50:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 43. [2022-11-03 02:50:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2022-11-03 02:50:43,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 34 [2022-11-03 02:50:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:43,249 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2022-11-03 02:50:43,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2022-11-03 02:50:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:43,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:43,251 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] [2022-11-03 02:50:43,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:43,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:43,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1363304277, now seen corresponding path program 1 times [2022-11-03 02:50:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:43,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144139744] [2022-11-03 02:50:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:43,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:43,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:43,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:50:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:43,942 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 02:50:43,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:43,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144139744] [2022-11-03 02:50:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144139744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:43,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:43,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614212730] [2022-11-03 02:50:43,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:43,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:43,945 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:44,106 INFO L93 Difference]: Finished difference Result 101 states and 143 transitions. [2022-11-03 02:50:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:44,108 INFO L225 Difference]: With dead ends: 101 [2022-11-03 02:50:44,108 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 02:50:44,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:44,110 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 91 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:44,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 245 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:50:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 02:50:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2022-11-03 02:50:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-03 02:50:44,117 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 34 [2022-11-03 02:50:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:44,118 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-03 02:50:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-03 02:50:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:44,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:44,119 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] [2022-11-03 02:50:44,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:44,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2043362647, now seen corresponding path program 1 times [2022-11-03 02:50:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931376745] [2022-11-03 02:50:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:44,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:44,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:44,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:50:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:44,782 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 02:50:44,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:44,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931376745] [2022-11-03 02:50:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931376745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:44,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647501680] [2022-11-03 02:50:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:44,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:44,792 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:44,931 INFO L93 Difference]: Finished difference Result 103 states and 145 transitions. [2022-11-03 02:50:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:44,934 INFO L225 Difference]: With dead ends: 103 [2022-11-03 02:50:44,934 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 02:50:44,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:44,935 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:44,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:50:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 02:50:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-11-03 02:50:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-11-03 02:50:44,947 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 34 [2022-11-03 02:50:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:44,947 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-11-03 02:50:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-11-03 02:50:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:44,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:44,949 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] [2022-11-03 02:50:44,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:45,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash -476597287, now seen corresponding path program 1 times [2022-11-03 02:50:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201429120] [2022-11-03 02:50:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:45,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:45,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:50:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:50:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:45,540 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 02:50:45,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:45,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201429120] [2022-11-03 02:50:45,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201429120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:45,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:45,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:50:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832691963] [2022-11-03 02:50:45,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:45,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:45,543 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:45,692 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2022-11-03 02:50:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:50:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:45,695 INFO L225 Difference]: With dead ends: 159 [2022-11-03 02:50:45,695 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 02:50:45,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:50:45,697 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:45,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 194 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 02:50:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 02:50:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-03 02:50:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.416) internal successors, (177), 125 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 02:50:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 177 transitions. [2022-11-03 02:50:45,718 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 177 transitions. Word has length 34 [2022-11-03 02:50:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:45,719 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 177 transitions. [2022-11-03 02:50:45,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 177 transitions. [2022-11-03 02:50:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:45,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:45,721 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] [2022-11-03 02:50:45,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:45,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -474750245, now seen corresponding path program 1 times [2022-11-03 02:50:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367421506] [2022-11-03 02:50:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:45,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:45,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:45,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:50:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:50:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:46,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:47,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:47,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367421506] [2022-11-03 02:50:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367421506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:47,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073655063] [2022-11-03 02:50:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:47,330 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:47,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:50:47,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:50:47,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:50:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:50:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:47,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:48,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1073655063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:48,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133189947] [2022-11-03 02:50:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:48,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:48,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:50:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:48,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:50:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:49,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133189947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:49,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:50:49,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 02:50:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210994576] [2022-11-03 02:50:49,299 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:50:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:50:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:50:49,301 INFO L87 Difference]: Start difference. First operand 126 states and 177 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:49,646 INFO L93 Difference]: Finished difference Result 248 states and 348 transitions. [2022-11-03 02:50:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:50:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:49,648 INFO L225 Difference]: With dead ends: 248 [2022-11-03 02:50:49,648 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 02:50:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:50:49,652 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 283 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 287 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-03 02:50:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 02:50:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 198. [2022-11-03 02:50:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.4060913705583757) internal successors, (277), 197 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 277 transitions. [2022-11-03 02:50:49,668 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 277 transitions. Word has length 34 [2022-11-03 02:50:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:49,669 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 277 transitions. [2022-11-03 02:50:49,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 277 transitions. [2022-11-03 02:50:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:49,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:49,671 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] [2022-11-03 02:50:49,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:49,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:50,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2131273309, now seen corresponding path program 1 times [2022-11-03 02:50:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023312013] [2022-11-03 02:50:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:50,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:50,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:50,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:50:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:50:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:50,517 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 02:50:50,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:50,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:50,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023312013] [2022-11-03 02:50:50,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023312013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:50,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:50,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:50:50,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311256137] [2022-11-03 02:50:50,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:50,520 INFO L87 Difference]: Start difference. First operand 198 states and 277 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:50,556 INFO L93 Difference]: Finished difference Result 268 states and 377 transitions. [2022-11-03 02:50:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:50:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:50,558 INFO L225 Difference]: With dead ends: 268 [2022-11-03 02:50:50,558 INFO L226 Difference]: Without dead ends: 194 [2022-11-03 02:50:50,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:50,560 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:50,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 225 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-11-03 02:50:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-03 02:50:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-11-03 02:50:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4041450777202074) internal successors, (271), 193 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 271 transitions. [2022-11-03 02:50:50,577 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 271 transitions. Word has length 34 [2022-11-03 02:50:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:50,581 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 271 transitions. [2022-11-03 02:50:50,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 271 transitions. [2022-11-03 02:50:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:50,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:50,583 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] [2022-11-03 02:50:50,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:50,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2024992419, now seen corresponding path program 1 times [2022-11-03 02:50:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:50,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592782295] [2022-11-03 02:50:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:50,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:50,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:50,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:50:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:50:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:51,018 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 02:50:51,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:51,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:51,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592782295] [2022-11-03 02:50:51,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592782295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:51,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:51,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:50:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462957824] [2022-11-03 02:50:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:51,022 INFO L87 Difference]: Start difference. First operand 194 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:51,117 INFO L93 Difference]: Finished difference Result 528 states and 740 transitions. [2022-11-03 02:50:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:50:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:51,120 INFO L225 Difference]: With dead ends: 528 [2022-11-03 02:50:51,120 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 02:50:51,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:50:51,122 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 81 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 407 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-03 02:50:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 02:50:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 198. [2022-11-03 02:50:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.3959390862944163) internal successors, (275), 197 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 275 transitions. [2022-11-03 02:50:51,136 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 275 transitions. Word has length 34 [2022-11-03 02:50:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:51,136 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 275 transitions. [2022-11-03 02:50:51,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 275 transitions. [2022-11-03 02:50:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:51,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:51,138 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] [2022-11-03 02:50:51,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:51,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1602290593, now seen corresponding path program 1 times [2022-11-03 02:50:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:51,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341729365] [2022-11-03 02:50:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:51,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:51,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:51,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:51,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:50:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:51,620 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 02:50:51,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:51,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:51,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341729365] [2022-11-03 02:50:51,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341729365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:51,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:51,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64044094] [2022-11-03 02:50:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:51,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:51,622 INFO L87 Difference]: Start difference. First operand 198 states and 275 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:51,832 INFO L93 Difference]: Finished difference Result 425 states and 596 transitions. [2022-11-03 02:50:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:50:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:51,834 INFO L225 Difference]: With dead ends: 425 [2022-11-03 02:50:51,834 INFO L226 Difference]: Without dead ends: 281 [2022-11-03 02:50:51,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:50:51,836 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 166 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:51,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 282 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 61 Unchecked, 0.0s Time] [2022-11-03 02:50:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-03 02:50:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2022-11-03 02:50:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.3744075829383886) internal successors, (290), 211 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 290 transitions. [2022-11-03 02:50:51,850 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 290 transitions. Word has length 34 [2022-11-03 02:50:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:51,852 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 290 transitions. [2022-11-03 02:50:51,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,852 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 290 transitions. [2022-11-03 02:50:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:51,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:51,854 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] [2022-11-03 02:50:51,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 02:50:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:52,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1412813025, now seen corresponding path program 1 times [2022-11-03 02:50:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497269525] [2022-11-03 02:50:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:52,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:52,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:50:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:52,350 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 02:50:52,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:52,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497269525] [2022-11-03 02:50:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497269525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:52,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:52,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563710666] [2022-11-03 02:50:52,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:52,353 INFO L87 Difference]: Start difference. First operand 212 states and 290 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:52,491 INFO L93 Difference]: Finished difference Result 370 states and 511 transitions. [2022-11-03 02:50:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:50:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:52,495 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:50:52,495 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:50:52,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:50:52,496 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 87 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:52,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-11-03 02:50:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:50:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-11-03 02:50:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.3515981735159817) internal successors, (296), 219 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 296 transitions. [2022-11-03 02:50:52,506 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 296 transitions. Word has length 34 [2022-11-03 02:50:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:52,506 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 296 transitions. [2022-11-03 02:50:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 296 transitions. [2022-11-03 02:50:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:50:52,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:52,509 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] [2022-11-03 02:50:52,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:52,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2113877603, now seen corresponding path program 1 times [2022-11-03 02:50:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:52,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422961741] [2022-11-03 02:50:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:52,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:52,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:52,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:50:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:52,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:50:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:53,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:56,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422961741] [2022-11-03 02:50:56,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422961741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492856103] [2022-11-03 02:50:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:50:56,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:50:56,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:50:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:50:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492856103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918369657] [2022-11-03 02:50:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:57,015 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:50:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:50:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:57,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:58,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918369657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:58,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:50:58,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 19, 19] total 36 [2022-11-03 02:50:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083471303] [2022-11-03 02:50:58,097 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:50:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:50:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:50:58,099 INFO L87 Difference]: Start difference. First operand 220 states and 296 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:00,602 INFO L93 Difference]: Finished difference Result 950 states and 1279 transitions. [2022-11-03 02:51:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:51:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:00,606 INFO L225 Difference]: With dead ends: 950 [2022-11-03 02:51:00,606 INFO L226 Difference]: Without dead ends: 948 [2022-11-03 02:51:00,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=759, Invalid=4791, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:51:00,609 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 691 mSDsluCounter, 3360 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:00,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 3530 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 407 Invalid, 0 Unknown, 545 Unchecked, 0.6s Time] [2022-11-03 02:51:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-11-03 02:51:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 238. [2022-11-03 02:51:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.350210970464135) internal successors, (320), 237 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 320 transitions. [2022-11-03 02:51:00,625 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 320 transitions. Word has length 34 [2022-11-03 02:51:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:00,625 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 320 transitions. [2022-11-03 02:51:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 320 transitions. [2022-11-03 02:51:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:00,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:00,626 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] [2022-11-03 02:51:00,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:00,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:01,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:01,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1594283679, now seen corresponding path program 1 times [2022-11-03 02:51:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:01,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495861468] [2022-11-03 02:51:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:01,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:01,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:51:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:01,522 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 02:51:01,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:01,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:01,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495861468] [2022-11-03 02:51:01,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495861468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:01,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:01,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:51:01,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385776211] [2022-11-03 02:51:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:01,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:01,525 INFO L87 Difference]: Start difference. First operand 238 states and 320 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:01,656 INFO L93 Difference]: Finished difference Result 419 states and 564 transitions. [2022-11-03 02:51:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:01,658 INFO L225 Difference]: With dead ends: 419 [2022-11-03 02:51:01,658 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 02:51:01,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:51:01,659 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 89 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:01,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 251 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-11-03 02:51:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 02:51:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2022-11-03 02:51:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3390557939914163) internal successors, (312), 233 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 312 transitions. [2022-11-03 02:51:01,669 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 312 transitions. Word has length 34 [2022-11-03 02:51:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:01,669 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 312 transitions. [2022-11-03 02:51:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 312 transitions. [2022-11-03 02:51:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:01,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:01,671 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] [2022-11-03 02:51:01,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,883 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash 525529701, now seen corresponding path program 1 times [2022-11-03 02:51:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927460149] [2022-11-03 02:51:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:01,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:01,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:51:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:02,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:51:02,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:02,111 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 02:51:02,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:02,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927460149] [2022-11-03 02:51:02,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927460149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:02,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:02,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756868670] [2022-11-03 02:51:02,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:02,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:02,114 INFO L87 Difference]: Start difference. First operand 234 states and 312 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:02,171 INFO L93 Difference]: Finished difference Result 498 states and 670 transitions. [2022-11-03 02:51:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:02,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:02,174 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:51:02,174 INFO L226 Difference]: Without dead ends: 318 [2022-11-03 02:51:02,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:02,175 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:02,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 142 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-03 02:51:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 226. [2022-11-03 02:51:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.3333333333333333) internal successors, (300), 225 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 300 transitions. [2022-11-03 02:51:02,185 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 300 transitions. Word has length 34 [2022-11-03 02:51:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 300 transitions. [2022-11-03 02:51:02,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 300 transitions. [2022-11-03 02:51:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:02,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:02,187 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] [2022-11-03 02:51:02,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:02,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash -458977829, now seen corresponding path program 1 times [2022-11-03 02:51:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:02,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268918372] [2022-11-03 02:51:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:02,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:02,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:02,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:51:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:02,680 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 02:51:02,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:02,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268918372] [2022-11-03 02:51:02,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268918372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:02,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:02,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:51:02,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864733424] [2022-11-03 02:51:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:02,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:02,682 INFO L87 Difference]: Start difference. First operand 226 states and 300 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:02,824 INFO L93 Difference]: Finished difference Result 602 states and 828 transitions. [2022-11-03 02:51:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:02,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:02,827 INFO L225 Difference]: With dead ends: 602 [2022-11-03 02:51:02,827 INFO L226 Difference]: Without dead ends: 446 [2022-11-03 02:51:02,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:51:02,828 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:02,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 274 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 02:51:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-03 02:51:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 440. [2022-11-03 02:51:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.3599088838268794) internal successors, (597), 439 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 597 transitions. [2022-11-03 02:51:02,846 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 597 transitions. Word has length 34 [2022-11-03 02:51:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:02,846 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 597 transitions. [2022-11-03 02:51:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 597 transitions. [2022-11-03 02:51:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:02,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:02,847 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] [2022-11-03 02:51:02,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:03,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash 127828185, now seen corresponding path program 1 times [2022-11-03 02:51:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046126692] [2022-11-03 02:51:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:03,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:03,061 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:03,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:51:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:51:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:03,334 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 02:51:03,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:03,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:03,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046126692] [2022-11-03 02:51:03,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046126692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:03,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:03,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:03,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755273250] [2022-11-03 02:51:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:03,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:03,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:03,336 INFO L87 Difference]: Start difference. First operand 440 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:03,449 INFO L93 Difference]: Finished difference Result 718 states and 988 transitions. [2022-11-03 02:51:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:03,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:03,452 INFO L225 Difference]: With dead ends: 718 [2022-11-03 02:51:03,453 INFO L226 Difference]: Without dead ends: 568 [2022-11-03 02:51:03,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:51:03,454 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 137 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:03,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 166 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 02:51:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-03 02:51:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 426. [2022-11-03 02:51:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.36) internal successors, (578), 425 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 578 transitions. [2022-11-03 02:51:03,474 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 578 transitions. Word has length 34 [2022-11-03 02:51:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:03,474 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 578 transitions. [2022-11-03 02:51:03,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 578 transitions. [2022-11-03 02:51:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:03,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:03,475 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] [2022-11-03 02:51:03,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:03,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:03,676 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 129675227, now seen corresponding path program 1 times [2022-11-03 02:51:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:03,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176900366] [2022-11-03 02:51:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:03,678 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:51:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:51:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:04,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:04,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:04,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176900366] [2022-11-03 02:51:04,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176900366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:04,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525923019] [2022-11-03 02:51:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:04,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:04,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:04,771 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:04,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:51:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:05,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:51:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:05,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:05,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525923019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987955231] [2022-11-03 02:51:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:05,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:05,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:05,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:51:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:51:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:05,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987955231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:06,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 02:51:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684884482] [2022-11-03 02:51:06,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:51:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:51:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:51:06,494 INFO L87 Difference]: Start difference. First operand 426 states and 578 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:07,097 INFO L93 Difference]: Finished difference Result 1642 states and 2249 transitions. [2022-11-03 02:51:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:51:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:07,103 INFO L225 Difference]: With dead ends: 1642 [2022-11-03 02:51:07,103 INFO L226 Difference]: Without dead ends: 1640 [2022-11-03 02:51:07,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:51:07,105 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 776 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:07,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 560 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 74 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-11-03 02:51:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-11-03 02:51:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 765. [2022-11-03 02:51:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.37565445026178) internal successors, (1051), 764 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1051 transitions. [2022-11-03 02:51:07,145 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1051 transitions. Word has length 34 [2022-11-03 02:51:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:07,145 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1051 transitions. [2022-11-03 02:51:07,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1051 transitions. [2022-11-03 02:51:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:07,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:07,146 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] [2022-11-03 02:51:07,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:07,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-03 02:51:07,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-03 02:51:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:07,759 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1904682589, now seen corresponding path program 1 times [2022-11-03 02:51:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:07,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249955279] [2022-11-03 02:51:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:07,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:07,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:07,761 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:07,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:51:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:08,025 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 02:51:08,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:08,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249955279] [2022-11-03 02:51:08,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249955279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:08,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:08,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:51:08,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640491714] [2022-11-03 02:51:08,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:08,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:08,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:08,027 INFO L87 Difference]: Start difference. First operand 765 states and 1051 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:08,199 INFO L93 Difference]: Finished difference Result 1401 states and 1939 transitions. [2022-11-03 02:51:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:51:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:08,203 INFO L225 Difference]: With dead ends: 1401 [2022-11-03 02:51:08,204 INFO L226 Difference]: Without dead ends: 1191 [2022-11-03 02:51:08,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:51:08,206 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 135 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 256 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 02:51:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-11-03 02:51:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1157. [2022-11-03 02:51:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 1.3858131487889274) internal successors, (1602), 1156 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1602 transitions. [2022-11-03 02:51:08,252 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1602 transitions. Word has length 34 [2022-11-03 02:51:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:08,252 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1602 transitions. [2022-11-03 02:51:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1602 transitions. [2022-11-03 02:51:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:08,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:08,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:08,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:08,466 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash -200563259, now seen corresponding path program 1 times [2022-11-03 02:51:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:08,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129800446] [2022-11-03 02:51:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:08,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:08,469 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:08,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:51:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:08,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:09,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:09,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129800446] [2022-11-03 02:51:09,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129800446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:09,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513109596] [2022-11-03 02:51:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:09,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:09,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:09,351 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:09,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 02:51:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:51:09,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:51:09,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:09,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513109596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:09,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:51:09,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 25 [2022-11-03 02:51:09,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058619971] [2022-11-03 02:51:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:09,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:51:09,696 INFO L87 Difference]: Start difference. First operand 1157 states and 1602 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:09,837 INFO L93 Difference]: Finished difference Result 2579 states and 3564 transitions. [2022-11-03 02:51:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:09,842 INFO L225 Difference]: With dead ends: 2579 [2022-11-03 02:51:09,842 INFO L226 Difference]: Without dead ends: 1546 [2022-11-03 02:51:09,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:51:09,845 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 182 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:09,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 183 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-11-03 02:51:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1159. [2022-11-03 02:51:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 1.3652849740932642) internal successors, (1581), 1158 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1581 transitions. [2022-11-03 02:51:09,901 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1581 transitions. Word has length 63 [2022-11-03 02:51:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:09,901 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1581 transitions. [2022-11-03 02:51:09,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1581 transitions. [2022-11-03 02:51:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:09,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:09,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:09,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:10,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:10,316 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2006001593, now seen corresponding path program 1 times [2022-11-03 02:51:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446783675] [2022-11-03 02:51:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:10,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:10,318 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:10,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:51:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:10,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:10,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:11,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:11,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446783675] [2022-11-03 02:51:11,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446783675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:11,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005052547] [2022-11-03 02:51:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:11,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:11,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:11,115 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:11,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:51:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:51:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:51:11,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:11,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005052547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:11,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:51:11,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 25 [2022-11-03 02:51:11,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838515066] [2022-11-03 02:51:11,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:11,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:11,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:51:11,421 INFO L87 Difference]: Start difference. First operand 1159 states and 1581 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:11,577 INFO L93 Difference]: Finished difference Result 2172 states and 2932 transitions. [2022-11-03 02:51:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:11,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:11,582 INFO L225 Difference]: With dead ends: 2172 [2022-11-03 02:51:11,582 INFO L226 Difference]: Without dead ends: 1425 [2022-11-03 02:51:11,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:51:11,584 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:11,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 157 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-11-03 02:51:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 967. [2022-11-03 02:51:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.3333333333333333) internal successors, (1288), 966 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1288 transitions. [2022-11-03 02:51:11,631 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1288 transitions. Word has length 63 [2022-11-03 02:51:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:11,631 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1288 transitions. [2022-11-03 02:51:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1288 transitions. [2022-11-03 02:51:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:11,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:11,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:11,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-03 02:51:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:12,046 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1850715213, now seen corresponding path program 1 times [2022-11-03 02:51:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:12,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730791515] [2022-11-03 02:51:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:12,048 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:12,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:51:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:12,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:12,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:12,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:12,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730791515] [2022-11-03 02:51:12,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730791515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:12,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1468487128] [2022-11-03 02:51:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:12,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:12,883 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:12,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:51:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:51:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:51:13,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:13,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1468487128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:13,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:51:13,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 25 [2022-11-03 02:51:13,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287423881] [2022-11-03 02:51:13,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:13,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:51:13,179 INFO L87 Difference]: Start difference. First operand 967 states and 1288 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:13,324 INFO L93 Difference]: Finished difference Result 2273 states and 3030 transitions. [2022-11-03 02:51:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:13,328 INFO L225 Difference]: With dead ends: 2273 [2022-11-03 02:51:13,328 INFO L226 Difference]: Without dead ends: 1422 [2022-11-03 02:51:13,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:51:13,330 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 110 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:13,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 234 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2022-11-03 02:51:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 967. [2022-11-03 02:51:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.313664596273292) internal successors, (1269), 966 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1269 transitions. [2022-11-03 02:51:13,385 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1269 transitions. Word has length 63 [2022-11-03 02:51:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:13,386 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1269 transitions. [2022-11-03 02:51:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1269 transitions. [2022-11-03 02:51:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:13,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:13,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:13,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 02:51:13,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:51:13,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:13,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2021550257, now seen corresponding path program 1 times [2022-11-03 02:51:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804147708] [2022-11-03 02:51:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:13,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:13,793 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:13,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:51:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:13,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:14,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804147708] [2022-11-03 02:51:14,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804147708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114424348] [2022-11-03 02:51:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:14,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:14,567 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:14,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:51:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:51:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:51:14,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:14,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114424348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:14,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:51:14,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 25 [2022-11-03 02:51:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810958861] [2022-11-03 02:51:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:51:14,865 INFO L87 Difference]: Start difference. First operand 967 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:14,997 INFO L93 Difference]: Finished difference Result 2697 states and 3519 transitions. [2022-11-03 02:51:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:15,005 INFO L225 Difference]: With dead ends: 2697 [2022-11-03 02:51:15,005 INFO L226 Difference]: Without dead ends: 1884 [2022-11-03 02:51:15,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:51:15,007 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 176 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 256 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-11-03 02:51:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1055. [2022-11-03 02:51:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 1.2827324478178368) internal successors, (1352), 1054 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1352 transitions. [2022-11-03 02:51:15,062 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1352 transitions. Word has length 63 [2022-11-03 02:51:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:15,062 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1352 transitions. [2022-11-03 02:51:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1352 transitions. [2022-11-03 02:51:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:15,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:15,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:15,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:15,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:51:15,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:15,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1341491887, now seen corresponding path program 1 times [2022-11-03 02:51:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152145348] [2022-11-03 02:51:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:15,469 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:15,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:51:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:15,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:16,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152145348] [2022-11-03 02:51:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152145348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505416766] [2022-11-03 02:51:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:16,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:16,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:16,221 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:16,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:51:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:16,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:16,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505416766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419638476] [2022-11-03 02:51:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:16,724 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:16,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:51:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:16,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419638476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:17,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:17,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:51:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659478920] [2022-11-03 02:51:17,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:51:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:51:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:51:17,125 INFO L87 Difference]: Start difference. First operand 1055 states and 1352 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:18,715 INFO L93 Difference]: Finished difference Result 4919 states and 6262 transitions. [2022-11-03 02:51:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:51:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:18,724 INFO L225 Difference]: With dead ends: 4919 [2022-11-03 02:51:18,724 INFO L226 Difference]: Without dead ends: 4391 [2022-11-03 02:51:18,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:51:18,726 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 335 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1769 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 314 Invalid, 0 Unknown, 297 Unchecked, 0.3s Time] [2022-11-03 02:51:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2022-11-03 02:51:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 1163. [2022-11-03 02:51:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.274526678141136) internal successors, (1481), 1162 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1481 transitions. [2022-11-03 02:51:18,805 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1481 transitions. Word has length 63 [2022-11-03 02:51:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:18,806 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1481 transitions. [2022-11-03 02:51:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1481 transitions. [2022-11-03 02:51:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:18,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:18,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:18,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:19,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 02:51:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:19,411 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 44711507, now seen corresponding path program 1 times [2022-11-03 02:51:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:19,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044301762] [2022-11-03 02:51:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:19,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:19,413 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:19,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:51:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:19,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:20,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:20,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044301762] [2022-11-03 02:51:20,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044301762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:20,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1154797495] [2022-11-03 02:51:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:20,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:20,287 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:20,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:51:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1154797495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518372295] [2022-11-03 02:51:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:20,871 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:20,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:51:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:21,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:21,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518372295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:21,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:21,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:51:21,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287700993] [2022-11-03 02:51:21,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:21,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:51:21,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:51:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:51:21,318 INFO L87 Difference]: Start difference. First operand 1163 states and 1481 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:21,689 INFO L93 Difference]: Finished difference Result 3395 states and 4344 transitions. [2022-11-03 02:51:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:51:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:21,694 INFO L225 Difference]: With dead ends: 3395 [2022-11-03 02:51:21,694 INFO L226 Difference]: Without dead ends: 2853 [2022-11-03 02:51:21,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:51:21,696 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 306 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:21,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1800 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2022-11-03 02:51:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2022-11-03 02:51:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2105. [2022-11-03 02:51:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 1.2732889733840305) internal successors, (2679), 2104 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 2679 transitions. [2022-11-03 02:51:21,794 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 2679 transitions. Word has length 63 [2022-11-03 02:51:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:21,795 INFO L495 AbstractCegarLoop]: Abstraction has 2105 states and 2679 transitions. [2022-11-03 02:51:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 2679 transitions. [2022-11-03 02:51:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:21,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:21,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:21,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:22,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:22,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:22,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:22,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1543636395, now seen corresponding path program 1 times [2022-11-03 02:51:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841007899] [2022-11-03 02:51:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:22,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:22,413 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:22,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:51:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:22,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:23,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841007899] [2022-11-03 02:51:23,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841007899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465727474] [2022-11-03 02:51:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:23,324 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:23,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:51:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:23,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:23,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465727474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:23,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700355583] [2022-11-03 02:51:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:23,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:23,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:23,950 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:23,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:51:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:51:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:24,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:24,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700355583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:24,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:24,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:51:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70124113] [2022-11-03 02:51:24,483 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:51:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:51:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:51:24,484 INFO L87 Difference]: Start difference. First operand 2105 states and 2679 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:24,983 INFO L93 Difference]: Finished difference Result 2732 states and 3472 transitions. [2022-11-03 02:51:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:51:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:24,988 INFO L225 Difference]: With dead ends: 2732 [2022-11-03 02:51:24,988 INFO L226 Difference]: Without dead ends: 2234 [2022-11-03 02:51:24,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 350 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:51:24,990 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 67 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:24,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 895 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-11-03 02:51:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-11-03 02:51:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2155. [2022-11-03 02:51:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 1.2720519962859795) internal successors, (2740), 2154 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2740 transitions. [2022-11-03 02:51:25,073 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2740 transitions. Word has length 63 [2022-11-03 02:51:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:25,074 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 2740 transitions. [2022-11-03 02:51:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2740 transitions. [2022-11-03 02:51:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:25,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:25,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:25,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:25,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:25,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 02:51:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:25,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1541789353, now seen corresponding path program 1 times [2022-11-03 02:51:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888664198] [2022-11-03 02:51:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:25,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:51:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:51:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:31,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888664198] [2022-11-03 02:51:31,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888664198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1556443353] [2022-11-03 02:51:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:31,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:31,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:31,493 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:31,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:51:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:51:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:32,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:32,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1556443353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:32,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816781252] [2022-11-03 02:51:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:32,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:32,905 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:32,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:51:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:51:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:34,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816781252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:34,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:34,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 52 [2022-11-03 02:51:34,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122499391] [2022-11-03 02:51:34,442 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:34,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:51:34,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:51:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:51:34,444 INFO L87 Difference]: Start difference. First operand 2155 states and 2740 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:38,479 INFO L93 Difference]: Finished difference Result 4508 states and 5741 transitions. [2022-11-03 02:51:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 02:51:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:38,491 INFO L225 Difference]: With dead ends: 4508 [2022-11-03 02:51:38,491 INFO L226 Difference]: Without dead ends: 4506 [2022-11-03 02:51:38,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=859, Invalid=9241, Unknown=0, NotChecked=0, Total=10100 [2022-11-03 02:51:38,496 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 783 mSDsluCounter, 6376 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1346 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:38,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 6588 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 656 Invalid, 0 Unknown, 1346 Unchecked, 0.6s Time] [2022-11-03 02:51:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2022-11-03 02:51:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2205. [2022-11-03 02:51:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 1.2708711433756805) internal successors, (2801), 2204 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 2801 transitions. [2022-11-03 02:51:38,620 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 2801 transitions. Word has length 63 [2022-11-03 02:51:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:38,620 INFO L495 AbstractCegarLoop]: Abstraction has 2205 states and 2801 transitions. [2022-11-03 02:51:38,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 2801 transitions. [2022-11-03 02:51:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:38,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:38,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:38,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:51:38,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 02:51:39,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:39,236 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1635041709, now seen corresponding path program 1 times [2022-11-03 02:51:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099267967] [2022-11-03 02:51:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:39,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:39,238 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:39,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:51:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:39,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:51:39,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:51:39,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099267967] [2022-11-03 02:51:39,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099267967] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:39,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:39,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:51:39,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249665765] [2022-11-03 02:51:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:39,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:39,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:39,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:51:39,640 INFO L87 Difference]: Start difference. First operand 2205 states and 2801 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:39,927 INFO L93 Difference]: Finished difference Result 3789 states and 4795 transitions. [2022-11-03 02:51:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:51:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:39,933 INFO L225 Difference]: With dead ends: 3789 [2022-11-03 02:51:39,933 INFO L226 Difference]: Without dead ends: 2465 [2022-11-03 02:51:39,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:51:39,935 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 264 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:39,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 235 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-11-03 02:51:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1657. [2022-11-03 02:51:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 1.2427536231884058) internal successors, (2058), 1656 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2058 transitions. [2022-11-03 02:51:40,031 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2058 transitions. Word has length 63 [2022-11-03 02:51:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:40,031 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2058 transitions. [2022-11-03 02:51:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2058 transitions. [2022-11-03 02:51:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:40,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:40,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:40,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:40,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:40,246 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1581668111, now seen corresponding path program 1 times [2022-11-03 02:51:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:40,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689576690] [2022-11-03 02:51:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:40,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:40,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:40,248 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:40,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:51:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:51:40,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:40,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689576690] [2022-11-03 02:51:40,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689576690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:40,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:40,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:51:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606345112] [2022-11-03 02:51:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:51:40,546 INFO L87 Difference]: Start difference. First operand 1657 states and 2058 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:40,699 INFO L93 Difference]: Finished difference Result 2994 states and 3729 transitions. [2022-11-03 02:51:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:51:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:40,703 INFO L225 Difference]: With dead ends: 2994 [2022-11-03 02:51:40,704 INFO L226 Difference]: Without dead ends: 1651 [2022-11-03 02:51:40,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:51:40,706 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:40,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 164 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-03 02:51:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-11-03 02:51:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1651. [2022-11-03 02:51:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.2424242424242424) internal successors, (2050), 1650 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2050 transitions. [2022-11-03 02:51:40,792 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2050 transitions. Word has length 63 [2022-11-03 02:51:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 1651 states and 2050 transitions. [2022-11-03 02:51:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2050 transitions. [2022-11-03 02:51:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:40,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:40,795 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:40,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:41,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:41,007 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2123764981, now seen corresponding path program 1 times [2022-11-03 02:51:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431778673] [2022-11-03 02:51:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:41,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:41,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:41,009 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:41,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:51:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:51:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:51:41,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:41,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431778673] [2022-11-03 02:51:41,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431778673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:41,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:41,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:51:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366645609] [2022-11-03 02:51:41,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:41,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:41,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:41,208 INFO L87 Difference]: Start difference. First operand 1651 states and 2050 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:41,317 INFO L93 Difference]: Finished difference Result 3365 states and 4177 transitions. [2022-11-03 02:51:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:41,320 INFO L225 Difference]: With dead ends: 3365 [2022-11-03 02:51:41,320 INFO L226 Difference]: Without dead ends: 1833 [2022-11-03 02:51:41,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:51:41,322 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 113 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:41,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 270 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 02:51:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-03 02:51:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1651. [2022-11-03 02:51:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.2412121212121212) internal successors, (2048), 1650 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2048 transitions. [2022-11-03 02:51:41,389 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2048 transitions. Word has length 63 [2022-11-03 02:51:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:41,390 INFO L495 AbstractCegarLoop]: Abstraction has 1651 states and 2048 transitions. [2022-11-03 02:51:41,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2048 transitions. [2022-11-03 02:51:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:41,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:41,392 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, 1, 1, 1, 1] [2022-11-03 02:51:41,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:41,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:41,604 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -184602935, now seen corresponding path program 2 times [2022-11-03 02:51:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768667781] [2022-11-03 02:51:41,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:41,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:41,606 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:41,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:51:41,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:41,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:42,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:42,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:42,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768667781] [2022-11-03 02:51:42,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768667781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1913946337] [2022-11-03 02:51:42,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:42,975 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:51:43,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:43,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1913946337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:43,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159078092] [2022-11-03 02:51:43,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:51:43,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:43,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:43,471 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:43,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:51:43,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:51:43,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:43,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159078092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:43,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:43,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 33 [2022-11-03 02:51:43,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905729189] [2022-11-03 02:51:43,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:43,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:51:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:51:43,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:51:43,860 INFO L87 Difference]: Start difference. First operand 1651 states and 2048 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:44,955 INFO L93 Difference]: Finished difference Result 4206 states and 5215 transitions. [2022-11-03 02:51:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:51:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:44,961 INFO L225 Difference]: With dead ends: 4206 [2022-11-03 02:51:44,961 INFO L226 Difference]: Without dead ends: 3122 [2022-11-03 02:51:44,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=415, Invalid=3007, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:51:44,964 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 434 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1927 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 203 Invalid, 0 Unknown, 463 Unchecked, 0.2s Time] [2022-11-03 02:51:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2022-11-03 02:51:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1685. [2022-11-03 02:51:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 1.23812351543943) internal successors, (2085), 1684 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2085 transitions. [2022-11-03 02:51:45,039 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2085 transitions. Word has length 63 [2022-11-03 02:51:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:45,039 INFO L495 AbstractCegarLoop]: Abstraction has 1685 states and 2085 transitions. [2022-11-03 02:51:45,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2085 transitions. [2022-11-03 02:51:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:45,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:45,041 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:45,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-03 02:51:45,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 02:51:45,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:45,663 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1201600459, now seen corresponding path program 1 times [2022-11-03 02:51:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071450633] [2022-11-03 02:51:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:45,665 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:45,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:51:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:45,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:46,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071450633] [2022-11-03 02:51:47,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071450633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740008659] [2022-11-03 02:51:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:47,112 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:47,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 02:51:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740008659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127450138] [2022-11-03 02:51:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:47,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:47,688 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:47,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 02:51:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:48,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127450138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:48,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:48,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 33 [2022-11-03 02:51:48,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853369525] [2022-11-03 02:51:48,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:48,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:51:48,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:51:48,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:51:48,142 INFO L87 Difference]: Start difference. First operand 1685 states and 2085 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:49,295 INFO L93 Difference]: Finished difference Result 4350 states and 5350 transitions. [2022-11-03 02:51:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:51:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:49,300 INFO L225 Difference]: With dead ends: 4350 [2022-11-03 02:51:49,300 INFO L226 Difference]: Without dead ends: 3298 [2022-11-03 02:51:49,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:51:49,302 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 411 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 3457 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:49,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 3457 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 497 Invalid, 0 Unknown, 530 Unchecked, 0.4s Time] [2022-11-03 02:51:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2022-11-03 02:51:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 1747. [2022-11-03 02:51:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.2371134020618557) internal successors, (2160), 1746 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2160 transitions. [2022-11-03 02:51:49,377 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2160 transitions. Word has length 63 [2022-11-03 02:51:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:49,377 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 2160 transitions. [2022-11-03 02:51:49,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2160 transitions. [2022-11-03 02:51:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:49,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:49,379 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:49,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-03 02:51:49,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 02:51:49,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 02:51:49,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:49,999 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash -386747443, now seen corresponding path program 1 times [2022-11-03 02:51:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269032458] [2022-11-03 02:51:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:50,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:50,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:50,001 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:50,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:51:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:50,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:51:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:50,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:51,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269032458] [2022-11-03 02:51:51,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269032458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [408410022] [2022-11-03 02:51:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:51,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:51,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:51,664 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:51,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:51:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:51:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:52,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [408410022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126626578] [2022-11-03 02:51:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:52,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:52,365 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 02:51:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:51:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:52,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126626578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:52,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:52,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 33 [2022-11-03 02:51:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988025821] [2022-11-03 02:51:52,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:52,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:51:52,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:51:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:51:52,923 INFO L87 Difference]: Start difference. First operand 1747 states and 2160 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:54,220 INFO L93 Difference]: Finished difference Result 4291 states and 5295 transitions. [2022-11-03 02:51:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:51:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:51:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:54,225 INFO L225 Difference]: With dead ends: 4291 [2022-11-03 02:51:54,225 INFO L226 Difference]: Without dead ends: 3259 [2022-11-03 02:51:54,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=395, Invalid=3027, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:51:54,228 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 419 mSDsluCounter, 3375 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:54,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 3549 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 380 Invalid, 0 Unknown, 546 Unchecked, 0.4s Time] [2022-11-03 02:51:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-11-03 02:51:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 1738. [2022-11-03 02:51:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 1.2366148531951642) internal successors, (2148), 1737 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2148 transitions. [2022-11-03 02:51:54,314 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2148 transitions. Word has length 63 [2022-11-03 02:51:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:54,315 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2148 transitions. [2022-11-03 02:51:54,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2148 transitions. [2022-11-03 02:51:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:51:54,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:54,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:54,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:54,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:54,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 02:51:54,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:54,922 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash -384900401, now seen corresponding path program 1 times [2022-11-03 02:51:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:54,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060735292] [2022-11-03 02:51:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:54,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:54,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:54,923 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:51:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:51:55,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:56,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:03,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:03,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060735292] [2022-11-03 02:52:03,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060735292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:03,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730054814] [2022-11-03 02:52:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:03,182 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:03,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:03,183 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:03,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 02:52:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:52:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:03,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:04,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730054814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:04,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31856952] [2022-11-03 02:52:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:04,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:04,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:04,556 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:04,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 02:52:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:52:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:06,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31856952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:06,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:06,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32, 32, 33, 33] total 64 [2022-11-03 02:52:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099486822] [2022-11-03 02:52:06,243 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 02:52:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 02:52:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3872, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:52:06,245 INFO L87 Difference]: Start difference. First operand 1738 states and 2148 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:12,233 INFO L93 Difference]: Finished difference Result 2258 states and 2776 transitions. [2022-11-03 02:52:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 02:52:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:12,237 INFO L225 Difference]: With dead ends: 2258 [2022-11-03 02:52:12,237 INFO L226 Difference]: Without dead ends: 2256 [2022-11-03 02:52:12,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1265, Invalid=13741, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 02:52:12,242 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 916 mSDsluCounter, 5952 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 6098 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1494 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:12,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 6098 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 782 Invalid, 0 Unknown, 1494 Unchecked, 0.7s Time] [2022-11-03 02:52:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-11-03 02:52:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1724. [2022-11-03 02:52:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.2379570516540916) internal successors, (2133), 1723 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2133 transitions. [2022-11-03 02:52:12,329 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2133 transitions. Word has length 63 [2022-11-03 02:52:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:12,329 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2133 transitions. [2022-11-03 02:52:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2133 transitions. [2022-11-03 02:52:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:12,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:12,331 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-03 02:52:12,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:12,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 02:52:12,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 02:52:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:12,947 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1744927077, now seen corresponding path program 1 times [2022-11-03 02:52:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024722164] [2022-11-03 02:52:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:12,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:12,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:12,952 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:12,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:52:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:52:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:52:13,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:52:17,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:17,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024722164] [2022-11-03 02:52:17,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024722164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125137835] [2022-11-03 02:52:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:17,031 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:17,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:17,033 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:17,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:52:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:52:17,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:52:17,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:52:18,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125137835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291010135] [2022-11-03 02:52:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:18,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:18,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:18,512 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:18,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:52:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:52:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:52:19,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:52:20,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291010135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:20,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:20,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 40 [2022-11-03 02:52:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560176668] [2022-11-03 02:52:20,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:20,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:52:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:52:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:52:20,184 INFO L87 Difference]: Start difference. First operand 1724 states and 2133 transitions. Second operand has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:28,287 INFO L93 Difference]: Finished difference Result 9922 states and 12238 transitions. [2022-11-03 02:52:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-03 02:52:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:28,302 INFO L225 Difference]: With dead ends: 9922 [2022-11-03 02:52:28,302 INFO L226 Difference]: Without dead ends: 9920 [2022-11-03 02:52:28,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 334 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3247, Invalid=16493, Unknown=0, NotChecked=0, Total=19740 [2022-11-03 02:52:28,307 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 839 mSDsluCounter, 4584 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 4817 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1589 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 4817 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1094 Invalid, 0 Unknown, 1589 Unchecked, 1.0s Time] [2022-11-03 02:52:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2022-11-03 02:52:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 3151. [2022-11-03 02:52:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 3150 states have (on average 1.240952380952381) internal successors, (3909), 3150 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 3909 transitions. [2022-11-03 02:52:28,518 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 3909 transitions. Word has length 63 [2022-11-03 02:52:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:28,518 INFO L495 AbstractCegarLoop]: Abstraction has 3151 states and 3909 transitions. [2022-11-03 02:52:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 3909 transitions. [2022-11-03 02:52:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:28,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:28,520 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:28,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:28,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 02:52:28,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-03 02:52:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:29,124 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash 961692317, now seen corresponding path program 1 times [2022-11-03 02:52:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:29,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844611843] [2022-11-03 02:52:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:29,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:29,126 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:29,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:52:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:29,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:29,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:29,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844611843] [2022-11-03 02:52:29,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844611843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283426582] [2022-11-03 02:52:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:29,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:29,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:29,793 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:29,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:52:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1283426582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:30,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798749459] [2022-11-03 02:52:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:30,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:30,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:30,381 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:30,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:52:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:30,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798749459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:30,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:30,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 20 [2022-11-03 02:52:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265647570] [2022-11-03 02:52:30,807 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:52:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:52:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:52:30,809 INFO L87 Difference]: Start difference. First operand 3151 states and 3909 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:32,503 INFO L93 Difference]: Finished difference Result 14283 states and 17719 transitions. [2022-11-03 02:52:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:52:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:32,515 INFO L225 Difference]: With dead ends: 14283 [2022-11-03 02:52:32,515 INFO L226 Difference]: Without dead ends: 12145 [2022-11-03 02:52:32,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:52:32,519 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 929 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:32,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 754 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:52:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12145 states. [2022-11-03 02:52:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12145 to 3960. [2022-11-03 02:52:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 1.2313715584743623) internal successors, (4875), 3959 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 4875 transitions. [2022-11-03 02:52:32,794 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 4875 transitions. Word has length 63 [2022-11-03 02:52:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:32,795 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 4875 transitions. [2022-11-03 02:52:32,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 4875 transitions. [2022-11-03 02:52:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:32,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:32,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:32,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:33,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:33,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:52:33,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:33,423 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1954122091, now seen corresponding path program 1 times [2022-11-03 02:52:33,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:33,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587891454] [2022-11-03 02:52:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:33,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:33,425 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:52:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:33,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:52:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:52:33,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:52:33,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587891454] [2022-11-03 02:52:33,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587891454] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:52:33,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:52:33,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:52:33,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075054789] [2022-11-03 02:52:33,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:33,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:52:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:52:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:52:33,846 INFO L87 Difference]: Start difference. First operand 3960 states and 4875 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:34,298 INFO L93 Difference]: Finished difference Result 6833 states and 8425 transitions. [2022-11-03 02:52:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:52:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:34,304 INFO L225 Difference]: With dead ends: 6833 [2022-11-03 02:52:34,304 INFO L226 Difference]: Without dead ends: 5563 [2022-11-03 02:52:34,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:52:34,306 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 196 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:34,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 336 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2022-11-03 02:52:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 3114. [2022-11-03 02:52:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3113 states have (on average 1.2264696434307742) internal successors, (3818), 3113 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 3818 transitions. [2022-11-03 02:52:34,503 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 3818 transitions. Word has length 63 [2022-11-03 02:52:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:34,503 INFO L495 AbstractCegarLoop]: Abstraction has 3114 states and 3818 transitions. [2022-11-03 02:52:34,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 3818 transitions. [2022-11-03 02:52:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:34,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:34,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:34,718 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash -125402029, now seen corresponding path program 1 times [2022-11-03 02:52:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067709405] [2022-11-03 02:52:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:34,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:34,721 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:34,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:52:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:52:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:35,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:35,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067709405] [2022-11-03 02:52:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067709405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270235279] [2022-11-03 02:52:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:35,470 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:35,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:35,479 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 02:52:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:52:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:35,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270235279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326240694] [2022-11-03 02:52:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:36,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:36,014 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:36,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 02:52:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:52:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:36,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326240694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:36,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:36,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:52:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745514770] [2022-11-03 02:52:36,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:52:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:52:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:52:36,376 INFO L87 Difference]: Start difference. First operand 3114 states and 3818 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:37,092 INFO L93 Difference]: Finished difference Result 6816 states and 8368 transitions. [2022-11-03 02:52:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:52:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:37,095 INFO L225 Difference]: With dead ends: 6816 [2022-11-03 02:52:37,096 INFO L226 Difference]: Without dead ends: 4946 [2022-11-03 02:52:37,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:52:37,097 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 234 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:37,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1409 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-11-03 02:52:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-11-03 02:52:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 3620. [2022-11-03 02:52:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 1.2182923459519204) internal successors, (4409), 3619 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 4409 transitions. [2022-11-03 02:52:37,235 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 4409 transitions. Word has length 63 [2022-11-03 02:52:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:37,235 INFO L495 AbstractCegarLoop]: Abstraction has 3620 states and 4409 transitions. [2022-11-03 02:52:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 4409 transitions. [2022-11-03 02:52:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:37,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:37,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:37,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:37,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:52:37,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-03 02:52:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:37,841 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1260801365, now seen corresponding path program 1 times [2022-11-03 02:52:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:37,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279092124] [2022-11-03 02:52:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:37,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:37,843 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:37,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:52:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:38,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:38,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279092124] [2022-11-03 02:52:38,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279092124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690556794] [2022-11-03 02:52:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:38,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:38,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:38,835 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:38,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 02:52:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690556794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:39,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921646133] [2022-11-03 02:52:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:39,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:39,476 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 02:52:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:39,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:52:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:39,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921646133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:39,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:52:39,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275944862] [2022-11-03 02:52:39,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:39,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:52:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:52:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:52:40,002 INFO L87 Difference]: Start difference. First operand 3620 states and 4409 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:41,019 INFO L93 Difference]: Finished difference Result 7126 states and 8712 transitions. [2022-11-03 02:52:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:52:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:41,024 INFO L225 Difference]: With dead ends: 7126 [2022-11-03 02:52:41,025 INFO L226 Difference]: Without dead ends: 6021 [2022-11-03 02:52:41,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:52:41,027 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 165 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:41,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1971 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 238 Unchecked, 0.3s Time] [2022-11-03 02:52:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6021 states. [2022-11-03 02:52:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6021 to 4118. [2022-11-03 02:52:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 4117 states have (on average 1.2161768277872238) internal successors, (5007), 4117 states have internal predecessors, (5007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 5007 transitions. [2022-11-03 02:52:41,190 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 5007 transitions. Word has length 63 [2022-11-03 02:52:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:41,190 INFO L495 AbstractCegarLoop]: Abstraction has 4118 states and 5007 transitions. [2022-11-03 02:52:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 5007 transitions. [2022-11-03 02:52:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:41,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:41,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:41,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:52:41,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-03 02:52:41,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-03 02:52:41,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:41,806 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1262648407, now seen corresponding path program 1 times [2022-11-03 02:52:41,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193933863] [2022-11-03 02:52:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:41,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:41,808 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:41,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:52:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:52:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:42,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:47,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:47,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193933863] [2022-11-03 02:52:47,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193933863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:47,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1934887784] [2022-11-03 02:52:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:47,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:47,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:52:47,779 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:52:47,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 02:52:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:52:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:48,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:49,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1934887784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901975534] [2022-11-03 02:52:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:49,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:49,199 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 02:52:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:52:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:49,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901975534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:50,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:52:50,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 52 [2022-11-03 02:52:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793694961] [2022-11-03 02:52:50,791 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:52:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:52:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:52:50,793 INFO L87 Difference]: Start difference. First operand 4118 states and 5007 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:59,108 INFO L93 Difference]: Finished difference Result 9512 states and 11640 transitions. [2022-11-03 02:52:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-03 02:52:59,109 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:52:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:59,114 INFO L225 Difference]: With dead ends: 9512 [2022-11-03 02:52:59,114 INFO L226 Difference]: Without dead ends: 9510 [2022-11-03 02:52:59,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3623 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2216, Invalid=15606, Unknown=0, NotChecked=0, Total=17822 [2022-11-03 02:52:59,117 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 561 mSDsluCounter, 9157 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 9480 SdHoareTripleChecker+Invalid, 3134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1516 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:59,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 9480 Invalid, 3134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1587 Invalid, 0 Unknown, 1516 Unchecked, 1.2s Time] [2022-11-03 02:52:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2022-11-03 02:52:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 4070. [2022-11-03 02:52:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4070 states, 4069 states have (on average 1.2177439174244287) internal successors, (4955), 4069 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4070 states to 4070 states and 4955 transitions. [2022-11-03 02:52:59,278 INFO L78 Accepts]: Start accepts. Automaton has 4070 states and 4955 transitions. Word has length 63 [2022-11-03 02:52:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:59,279 INFO L495 AbstractCegarLoop]: Abstraction has 4070 states and 4955 transitions. [2022-11-03 02:52:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4070 states and 4955 transitions. [2022-11-03 02:52:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:59,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:59,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:59,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:59,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:59,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:59,883 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1412938001, now seen corresponding path program 1 times [2022-11-03 02:52:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534577717] [2022-11-03 02:52:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:59,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:59,885 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:53:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:53:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:00,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:00,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:00,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534577717] [2022-11-03 02:53:00,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534577717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:00,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:00,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:53:00,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573931354] [2022-11-03 02:53:00,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:00,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:53:00,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:53:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:53:00,098 INFO L87 Difference]: Start difference. First operand 4070 states and 4955 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:00,259 INFO L93 Difference]: Finished difference Result 6780 states and 8268 transitions. [2022-11-03 02:53:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:53:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:00,263 INFO L225 Difference]: With dead ends: 6780 [2022-11-03 02:53:00,263 INFO L226 Difference]: Without dead ends: 4060 [2022-11-03 02:53:00,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:53:00,265 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:00,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 204 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-03 02:53:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-11-03 02:53:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 4060. [2022-11-03 02:53:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 1.2177876324217787) internal successors, (4943), 4059 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 4943 transitions. [2022-11-03 02:53:00,431 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 4943 transitions. Word has length 63 [2022-11-03 02:53:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:00,431 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 4943 transitions. [2022-11-03 02:53:00,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 4943 transitions. [2022-11-03 02:53:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:53:00,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:00,433 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:00,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:00,646 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 249126151, now seen corresponding path program 2 times [2022-11-03 02:53:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971306045] [2022-11-03 02:53:00,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:00,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:00,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:00,648 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:00,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:53:00,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:53:00,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:53:00,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:00,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971306045] [2022-11-03 02:53:00,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971306045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:00,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:00,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530098669] [2022-11-03 02:53:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:00,825 INFO L87 Difference]: Start difference. First operand 4060 states and 4943 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:01,002 INFO L93 Difference]: Finished difference Result 7751 states and 9442 transitions. [2022-11-03 02:53:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:53:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:53:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:01,006 INFO L225 Difference]: With dead ends: 7751 [2022-11-03 02:53:01,006 INFO L226 Difference]: Without dead ends: 3879 [2022-11-03 02:53:01,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 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 02:53:01,008 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 76 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:01,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 125 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2022-11-03 02:53:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3857. [2022-11-03 02:53:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.216804979253112) internal successors, (4692), 3856 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 4692 transitions. [2022-11-03 02:53:01,180 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 4692 transitions. Word has length 63 [2022-11-03 02:53:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:01,181 INFO L495 AbstractCegarLoop]: Abstraction has 3857 states and 4692 transitions. [2022-11-03 02:53:01,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 4692 transitions. [2022-11-03 02:53:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:01,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:01,184 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:01,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 02:53:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:01,384 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -898242721, now seen corresponding path program 1 times [2022-11-03 02:53:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:01,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151958238] [2022-11-03 02:53:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:01,386 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:01,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 02:53:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 74 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:53:01,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:53:01,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:01,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151958238] [2022-11-03 02:53:01,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151958238] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:01,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:01,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:53:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624991454] [2022-11-03 02:53:01,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:53:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:53:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:53:01,853 INFO L87 Difference]: Start difference. First operand 3857 states and 4692 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:02,266 INFO L93 Difference]: Finished difference Result 7145 states and 8709 transitions. [2022-11-03 02:53:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:53:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 02:53:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:02,269 INFO L225 Difference]: With dead ends: 7145 [2022-11-03 02:53:02,269 INFO L226 Difference]: Without dead ends: 3635 [2022-11-03 02:53:02,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:53:02,272 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 238 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:02,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 212 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2022-11-03 02:53:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2753. [2022-11-03 02:53:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.2049418604651163) internal successors, (3316), 2752 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 3316 transitions. [2022-11-03 02:53:02,398 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 3316 transitions. Word has length 92 [2022-11-03 02:53:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:02,398 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 3316 transitions. [2022-11-03 02:53:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 3316 transitions. [2022-11-03 02:53:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:02,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:02,400 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:02,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 02:53:02,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:02,614 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:02,614 INFO L85 PathProgramCache]: Analyzing trace with hash 280253347, now seen corresponding path program 2 times [2022-11-03 02:53:02,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:02,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273789654] [2022-11-03 02:53:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:02,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:02,616 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:02,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:53:02,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:03,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:03,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:03,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273789654] [2022-11-03 02:53:03,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273789654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:03,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [637241279] [2022-11-03 02:53:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:03,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:03,657 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:03,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:53:04,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:04,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:04,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [637241279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311172557] [2022-11-03 02:53:04,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:04,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:04,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:04,544 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:04,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-03 02:53:04,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:04,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311172557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:05,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:05,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:53:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303072947] [2022-11-03 02:53:05,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:53:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:53:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:53:05,211 INFO L87 Difference]: Start difference. First operand 2753 states and 3316 transitions. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:05,950 INFO L93 Difference]: Finished difference Result 4092 states and 4930 transitions. [2022-11-03 02:53:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:53:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:05,952 INFO L225 Difference]: With dead ends: 4092 [2022-11-03 02:53:05,952 INFO L226 Difference]: Without dead ends: 3722 [2022-11-03 02:53:05,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 524 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:53:05,954 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 193 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:05,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 775 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 271 Unchecked, 0.1s Time] [2022-11-03 02:53:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2022-11-03 02:53:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2875. [2022-11-03 02:53:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 1.2042449547668754) internal successors, (3461), 2874 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 3461 transitions. [2022-11-03 02:53:06,122 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 3461 transitions. Word has length 92 [2022-11-03 02:53:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:06,122 INFO L495 AbstractCegarLoop]: Abstraction has 2875 states and 3461 transitions. [2022-11-03 02:53:06,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 3461 transitions. [2022-11-03 02:53:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:06,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:06,124 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:06,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:53:06,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-03 02:53:06,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:06,725 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 282100389, now seen corresponding path program 2 times [2022-11-03 02:53:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902046622] [2022-11-03 02:53:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:06,727 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:06,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:53:06,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:53:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:07,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:12,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902046622] [2022-11-03 02:53:12,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902046622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [147414733] [2022-11-03 02:53:12,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:12,842 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:12,848 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:12,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 02:53:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:53:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:13,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:14,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [147414733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665532794] [2022-11-03 02:53:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:14,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:14,641 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:14,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-03 02:53:14,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:53:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:53:15,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 72 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:53:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665532794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:16,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:16,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 52 [2022-11-03 02:53:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390136212] [2022-11-03 02:53:16,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:53:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:53:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:53:16,517 INFO L87 Difference]: Start difference. First operand 2875 states and 3461 transitions. Second operand has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:24,885 INFO L93 Difference]: Finished difference Result 6396 states and 7686 transitions. [2022-11-03 02:53:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 02:53:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:24,889 INFO L225 Difference]: With dead ends: 6396 [2022-11-03 02:53:24,890 INFO L226 Difference]: Without dead ends: 6394 [2022-11-03 02:53:24,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2244, Invalid=16938, Unknown=0, NotChecked=0, Total=19182 [2022-11-03 02:53:24,892 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 583 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 4020 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2083 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:24,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 4020 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 893 Invalid, 0 Unknown, 2083 Unchecked, 0.8s Time] [2022-11-03 02:53:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2022-11-03 02:53:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 2832. [2022-11-03 02:53:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 1.205581066760862) internal successors, (3413), 2831 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3413 transitions. [2022-11-03 02:53:25,116 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3413 transitions. Word has length 92 [2022-11-03 02:53:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:25,116 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 3413 transitions. [2022-11-03 02:53:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3413 transitions. [2022-11-03 02:53:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:25,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:25,121 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:25,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:25,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 02:53:25,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-11-03 02:53:25,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:25,722 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash -115601127, now seen corresponding path program 1 times [2022-11-03 02:53:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:25,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945177225] [2022-11-03 02:53:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:25,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:25,724 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:25,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:53:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:26,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:26,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:26,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945177225] [2022-11-03 02:53:26,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945177225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790162414] [2022-11-03 02:53:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:26,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:26,859 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:26,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 02:53:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:27,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:27,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1790162414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547348454] [2022-11-03 02:53:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:27,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:27,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:27,708 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:27,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 02:53:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:28,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:53:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547348454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:28,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:28,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:53:28,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612481088] [2022-11-03 02:53:28,408 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:28,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:53:28,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:53:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:53:28,409 INFO L87 Difference]: Start difference. First operand 2832 states and 3413 transitions. Second operand has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:28,819 INFO L93 Difference]: Finished difference Result 4627 states and 5567 transitions. [2022-11-03 02:53:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:53:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:28,823 INFO L225 Difference]: With dead ends: 4627 [2022-11-03 02:53:28,824 INFO L226 Difference]: Without dead ends: 3708 [2022-11-03 02:53:28,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 524 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:53:28,826 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 165 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:28,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 842 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-11-03 02:53:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2022-11-03 02:53:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 1517. [2022-11-03 02:53:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.2031662269129288) internal successors, (1824), 1516 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 1824 transitions. [2022-11-03 02:53:28,918 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 1824 transitions. Word has length 92 [2022-11-03 02:53:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:28,918 INFO L495 AbstractCegarLoop]: Abstraction has 1517 states and 1824 transitions. [2022-11-03 02:53:28,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 1824 transitions. [2022-11-03 02:53:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:28,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:28,921 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:28,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-03 02:53:29,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 02:53:29,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-03 02:53:29,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:29,527 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:29,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1703949029, now seen corresponding path program 2 times [2022-11-03 02:53:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238741717] [2022-11-03 02:53:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:29,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:29,529 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:53:29,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:53:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:53:30,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:53:31,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238741717] [2022-11-03 02:53:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238741717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651691754] [2022-11-03 02:53:31,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:31,461 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:31,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 02:53:31,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:53:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:53:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:53:33,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651691754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:33,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52329932] [2022-11-03 02:53:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:33,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:33,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:33,217 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:33,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 02:53:33,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:33,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:53:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:53:33,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:53:34,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52329932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:34,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 02:53:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799578883] [2022-11-03 02:53:34,982 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:53:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:53:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:53:34,983 INFO L87 Difference]: Start difference. First operand 1517 states and 1824 transitions. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:35,510 INFO L93 Difference]: Finished difference Result 1891 states and 2271 transitions. [2022-11-03 02:53:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:53:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:35,512 INFO L225 Difference]: With dead ends: 1891 [2022-11-03 02:53:35,513 INFO L226 Difference]: Without dead ends: 1889 [2022-11-03 02:53:35,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 530 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:53:35,513 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 425 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:35,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 344 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-03 02:53:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-03 02:53:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1026. [2022-11-03 02:53:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 1.201951219512195) internal successors, (1232), 1025 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1232 transitions. [2022-11-03 02:53:35,605 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1232 transitions. Word has length 92 [2022-11-03 02:53:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:35,605 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1232 transitions. [2022-11-03 02:53:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1232 transitions. [2022-11-03 02:53:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:35,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:35,606 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:35,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:35,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:36,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 02:53:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,208 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1817209951, now seen corresponding path program 3 times [2022-11-03 02:53:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660456532] [2022-11-03 02:53:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:36,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:36,210 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:36,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:53:36,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:53:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:53:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:53:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:53:36,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660456532] [2022-11-03 02:53:36,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660456532] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:36,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:36,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 02:53:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457882390] [2022-11-03 02:53:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:36,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:36,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:36,628 INFO L87 Difference]: Start difference. First operand 1026 states and 1232 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:36,728 INFO L93 Difference]: Finished difference Result 2040 states and 2446 transitions. [2022-11-03 02:53:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 02:53:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:36,730 INFO L225 Difference]: With dead ends: 2040 [2022-11-03 02:53:36,730 INFO L226 Difference]: Without dead ends: 1556 [2022-11-03 02:53:36,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:53:36,732 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 44 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:36,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 189 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-11-03 02:53:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-11-03 02:53:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1050. [2022-11-03 02:53:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.1954242135367017) internal successors, (1254), 1049 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1254 transitions. [2022-11-03 02:53:36,795 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1254 transitions. Word has length 92 [2022-11-03 02:53:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:36,795 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1254 transitions. [2022-11-03 02:53:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1254 transitions. [2022-11-03 02:53:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:36,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:36,798 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:36,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 02:53:36,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,998 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1819056993, now seen corresponding path program 3 times [2022-11-03 02:53:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448139708] [2022-11-03 02:53:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:37,000 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:53:37,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:53:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:53:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:39,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:43,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:43,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448139708] [2022-11-03 02:53:43,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448139708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:43,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001739841] [2022-11-03 02:53:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:43,085 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:43,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 02:53:43,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:53:43,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:53:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:43,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:45,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001739841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314490396] [2022-11-03 02:53:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:45,599 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:45,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 02:53:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:53:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:53:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:46,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:46,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314490396] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:46,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 02:53:46,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20, 20, 20, 20, 6] total 45 [2022-11-03 02:53:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231231204] [2022-11-03 02:53:46,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:53:46,357 INFO L87 Difference]: Start difference. First operand 1050 states and 1254 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:46,608 INFO L93 Difference]: Finished difference Result 3550 states and 4280 transitions. [2022-11-03 02:53:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:46,611 INFO L225 Difference]: With dead ends: 3550 [2022-11-03 02:53:46,611 INFO L226 Difference]: Without dead ends: 2562 [2022-11-03 02:53:46,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 503 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=178, Invalid=1984, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:53:46,612 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 155 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:46,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 174 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-11-03 02:53:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1142. [2022-11-03 02:53:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.1971954425942155) internal successors, (1366), 1141 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1366 transitions. [2022-11-03 02:53:46,680 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1366 transitions. Word has length 92 [2022-11-03 02:53:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:46,680 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1366 transitions. [2022-11-03 02:53:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1366 transitions. [2022-11-03 02:53:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:46,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:46,682 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:46,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-11-03 02:53:46,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:47,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 02:53:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:47,282 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1089706909, now seen corresponding path program 4 times [2022-11-03 02:53:47,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:47,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608773205] [2022-11-03 02:53:47,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:53:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:47,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:47,284 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:47,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:53:47,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:53:47,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:53:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 74 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:53:47,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:53:47,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608773205] [2022-11-03 02:53:47,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608773205] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:47,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:47,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:53:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489812165] [2022-11-03 02:53:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:53:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:53:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:53:47,724 INFO L87 Difference]: Start difference. First operand 1142 states and 1366 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:47,989 INFO L93 Difference]: Finished difference Result 2597 states and 3101 transitions. [2022-11-03 02:53:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:53:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:47,991 INFO L225 Difference]: With dead ends: 2597 [2022-11-03 02:53:47,991 INFO L226 Difference]: Without dead ends: 1515 [2022-11-03 02:53:47,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:53:47,992 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 195 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:47,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 206 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-11-03 02:53:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1124. [2022-11-03 02:53:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 1.1869991095280499) internal successors, (1333), 1123 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1333 transitions. [2022-11-03 02:53:48,079 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1333 transitions. Word has length 92 [2022-11-03 02:53:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:48,079 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1333 transitions. [2022-11-03 02:53:48,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1333 transitions. [2022-11-03 02:53:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:48,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:48,082 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:48,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 02:53:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,282 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1550811293, now seen corresponding path program 5 times [2022-11-03 02:53:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244967108] [2022-11-03 02:53:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:53:48,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:48,284 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:48,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:53:48,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:48,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:53:48,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:48,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:48,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244967108] [2022-11-03 02:53:48,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244967108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:48,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93789750] [2022-11-03 02:53:48,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:48,452 INFO L87 Difference]: Start difference. First operand 1124 states and 1333 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:48,590 INFO L93 Difference]: Finished difference Result 2257 states and 2689 transitions. [2022-11-03 02:53:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:53:48,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:53:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:48,591 INFO L225 Difference]: With dead ends: 2257 [2022-11-03 02:53:48,591 INFO L226 Difference]: Without dead ends: 1175 [2022-11-03 02:53:48,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 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 02:53:48,593 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 105 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:48,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 187 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-03 02:53:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1036. [2022-11-03 02:53:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 1.1545893719806763) internal successors, (1195), 1035 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1195 transitions. [2022-11-03 02:53:48,653 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1195 transitions. Word has length 92 [2022-11-03 02:53:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:48,653 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1195 transitions. [2022-11-03 02:53:48,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1195 transitions. [2022-11-03 02:53:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:53:48,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:48,654 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:48,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:53:48,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,855 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:48,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:48,855 INFO L85 PathProgramCache]: Analyzing trace with hash -804993957, now seen corresponding path program 6 times [2022-11-03 02:53:48,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:48,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946118557] [2022-11-03 02:53:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:53:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:48,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:48,857 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:48,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:53:49,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:53:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:53:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:53:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:54:00,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946118557] [2022-11-03 02:54:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946118557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054277569] [2022-11-03 02:54:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:54:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:00,091 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:00,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 02:54:00,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:54:00,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:54:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:54:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:54:04,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054277569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169152840] [2022-11-03 02:54:04,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:54:04,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:04,151 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:04,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-03 02:54:04,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:54:04,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 02:54:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:54:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:54:20,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169152840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:20,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:20,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30, 31, 31] total 86 [2022-11-03 02:54:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641398558] [2022-11-03 02:54:20,271 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-03 02:54:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-03 02:54:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=6976, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:54:20,272 INFO L87 Difference]: Start difference. First operand 1036 states and 1195 transitions. Second operand has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 86 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:29,516 INFO L93 Difference]: Finished difference Result 1164 states and 1338 transitions. [2022-11-03 02:54:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:54:29,517 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 86 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:54:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:29,518 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 02:54:29,518 INFO L226 Difference]: Without dead ends: 1162 [2022-11-03 02:54:29,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 456 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=472, Invalid=9628, Unknown=0, NotChecked=0, Total=10100 [2022-11-03 02:54:29,519 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 130 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:29,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 2777 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 996 Unchecked, 0.1s Time] [2022-11-03 02:54:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-11-03 02:54:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 982. [2022-11-03 02:54:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.1610601427115188) internal successors, (1139), 981 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1139 transitions. [2022-11-03 02:54:29,593 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1139 transitions. Word has length 92 [2022-11-03 02:54:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:29,593 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1139 transitions. [2022-11-03 02:54:29,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 86 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1139 transitions. [2022-11-03 02:54:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:54:29,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:29,594 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:29,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:54:29,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:30,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:30,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:30,195 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash -998807075, now seen corresponding path program 2 times [2022-11-03 02:54:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844374367] [2022-11-03 02:54:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:30,197 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:30,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:54:30,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:54:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:31,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:34,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844374367] [2022-11-03 02:54:34,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844374367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983545130] [2022-11-03 02:54:34,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:34,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:34,056 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:34,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 02:54:34,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:34,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:54:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:34,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983545130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:34,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058854069] [2022-11-03 02:54:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:34,911 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:34,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-03 02:54:35,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:35,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:54:35,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:35,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:35,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058854069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:35,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:35,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32, 32, 32, 32] total 61 [2022-11-03 02:54:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712819377] [2022-11-03 02:54:35,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:35,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-03 02:54:35,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-03 02:54:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3512, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:54:35,582 INFO L87 Difference]: Start difference. First operand 982 states and 1139 transitions. Second operand has 61 states, 61 states have (on average 2.5245901639344264) internal successors, (154), 61 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 02:54:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:39,509 INFO L93 Difference]: Finished difference Result 3912 states and 4507 transitions. [2022-11-03 02:54:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 02:54:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.5245901639344264) internal successors, (154), 61 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 92 [2022-11-03 02:54:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:39,513 INFO L225 Difference]: With dead ends: 3912 [2022-11-03 02:54:39,513 INFO L226 Difference]: Without dead ends: 2968 [2022-11-03 02:54:39,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 485 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=932, Invalid=10840, Unknown=0, NotChecked=0, Total=11772 [2022-11-03 02:54:39,515 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 689 mSDsluCounter, 7444 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 7658 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1517 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:39,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 7658 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 738 Invalid, 0 Unknown, 1517 Unchecked, 0.7s Time] [2022-11-03 02:54:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-11-03 02:54:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1056. [2022-11-03 02:54:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.1545023696682464) internal successors, (1218), 1055 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1218 transitions. [2022-11-03 02:54:39,599 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1218 transitions. Word has length 92 [2022-11-03 02:54:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:39,599 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1218 transitions. [2022-11-03 02:54:39,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.5245901639344264) internal successors, (154), 61 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 02:54:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1218 transitions. [2022-11-03 02:54:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:54:39,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:39,601 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:39,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-03 02:54:39,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 02:54:40,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,202 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash 387396319, now seen corresponding path program 3 times [2022-11-03 02:54:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:40,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021836047] [2022-11-03 02:54:40,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:54:40,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:40,206 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:40,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 02:54:40,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:54:40,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:54:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:54:40,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:54:40,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021836047] [2022-11-03 02:54:40,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021836047] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:40,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:54:40,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 02:54:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058205275] [2022-11-03 02:54:40,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:54:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:54:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:54:40,587 INFO L87 Difference]: Start difference. First operand 1056 states and 1218 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:40,802 INFO L93 Difference]: Finished difference Result 2862 states and 3318 transitions. [2022-11-03 02:54:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:54:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:54:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:40,804 INFO L225 Difference]: With dead ends: 2862 [2022-11-03 02:54:40,805 INFO L226 Difference]: Without dead ends: 1752 [2022-11-03 02:54:40,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:40,806 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 115 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:40,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 203 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-11-03 02:54:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 804. [2022-11-03 02:54:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.12826899128269) internal successors, (906), 803 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 906 transitions. [2022-11-03 02:54:40,885 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 906 transitions. Word has length 92 [2022-11-03 02:54:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:40,886 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 906 transitions. [2022-11-03 02:54:40,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 906 transitions. [2022-11-03 02:54:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:54:40,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:40,888 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:40,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-03 02:54:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:54:41,100 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -315147919, now seen corresponding path program 1 times [2022-11-03 02:54:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235688531] [2022-11-03 02:54:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:41,102 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:54:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:54:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:42,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:46,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235688531] [2022-11-03 02:54:46,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235688531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277289455] [2022-11-03 02:54:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:46,995 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 02:54:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:54:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:47,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:49,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277289455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221906605] [2022-11-03 02:54:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:49,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:49,283 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:49,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 02:54:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:54:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:50,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:54:51,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221906605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:51,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 23, 23] total 44 [2022-11-03 02:54:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410528280] [2022-11-03 02:54:51,645 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:54:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:54:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1782, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:54:51,646 INFO L87 Difference]: Start difference. First operand 804 states and 906 transitions. Second operand has 44 states, 44 states have (on average 4.090909090909091) internal successors, (180), 44 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:56,042 INFO L93 Difference]: Finished difference Result 2065 states and 2336 transitions. [2022-11-03 02:54:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 02:54:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.090909090909091) internal successors, (180), 44 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:54:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:56,045 INFO L225 Difference]: With dead ends: 2065 [2022-11-03 02:54:56,045 INFO L226 Difference]: Without dead ends: 2063 [2022-11-03 02:54:56,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 499 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1069, Invalid=7303, Unknown=0, NotChecked=0, Total=8372 [2022-11-03 02:54:56,046 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 483 mSDsluCounter, 6097 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 6345 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:56,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 6345 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 663 Invalid, 0 Unknown, 975 Unchecked, 0.8s Time] [2022-11-03 02:54:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2022-11-03 02:54:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1163. [2022-11-03 02:54:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.129948364888124) internal successors, (1313), 1162 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1313 transitions. [2022-11-03 02:54:56,168 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1313 transitions. Word has length 92 [2022-11-03 02:54:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:56,168 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1313 transitions. [2022-11-03 02:54:56,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.090909090909091) internal successors, (180), 44 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1313 transitions. [2022-11-03 02:54:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:54:56,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:56,170 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:56,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 02:54:56,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:56,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:56,771 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash -313300877, now seen corresponding path program 2 times [2022-11-03 02:54:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016713737] [2022-11-03 02:54:56,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:56,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:56,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:56,773 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:54:56,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:56,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:54:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:54:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:54:59,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016713737] [2022-11-03 02:54:59,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016713737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [581971117] [2022-11-03 02:54:59,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:59,656 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:59,661 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:59,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 02:55:00,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:00,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:55:00,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:00,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:01,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [581971117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:01,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296317674] [2022-11-03 02:55:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:01,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:01,810 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:01,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 02:55:02,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:55:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:03,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296317674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:03,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:03,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 30 [2022-11-03 02:55:03,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657855969] [2022-11-03 02:55:03,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:03,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:55:03,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:55:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:55:03,738 INFO L87 Difference]: Start difference. First operand 1163 states and 1313 transitions. Second operand has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:06,902 INFO L93 Difference]: Finished difference Result 2581 states and 2925 transitions. [2022-11-03 02:55:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:55:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:55:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:06,904 INFO L225 Difference]: With dead ends: 2581 [2022-11-03 02:55:06,904 INFO L226 Difference]: Without dead ends: 1646 [2022-11-03 02:55:06,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=892, Invalid=3530, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:55:06,906 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 719 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:06,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 976 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 373 Unchecked, 0.4s Time] [2022-11-03 02:55:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-11-03 02:55:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1192. [2022-11-03 02:55:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 1.1293031066330814) internal successors, (1345), 1191 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1345 transitions. [2022-11-03 02:55:07,015 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1345 transitions. Word has length 92 [2022-11-03 02:55:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:07,015 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1345 transitions. [2022-11-03 02:55:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1345 transitions. [2022-11-03 02:55:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:55:07,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:07,016 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:07,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:07,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-03 02:55:07,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-03 02:55:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:07,619 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash 137944807, now seen corresponding path program 1 times [2022-11-03 02:55:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:07,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227351145] [2022-11-03 02:55:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:07,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:07,621 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:07,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 02:55:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:55:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:55:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:55:07,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227351145] [2022-11-03 02:55:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227351145] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:55:07,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:55:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 02:55:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565345636] [2022-11-03 02:55:07,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:55:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:55:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:55:07,986 INFO L87 Difference]: Start difference. First operand 1192 states and 1345 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:08,156 INFO L93 Difference]: Finished difference Result 1873 states and 2126 transitions. [2022-11-03 02:55:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:55:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:55:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:08,157 INFO L225 Difference]: With dead ends: 1873 [2022-11-03 02:55:08,158 INFO L226 Difference]: Without dead ends: 1132 [2022-11-03 02:55:08,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:55:08,159 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 109 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:08,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 169 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:55:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-03 02:55:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1060. [2022-11-03 02:55:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 1.1161473087818696) internal successors, (1182), 1059 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1182 transitions. [2022-11-03 02:55:08,276 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1182 transitions. Word has length 92 [2022-11-03 02:55:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:08,276 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1182 transitions. [2022-11-03 02:55:08,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1182 transitions. [2022-11-03 02:55:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:55:08,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:08,278 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:08,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 02:55:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:08,479 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1966642799, now seen corresponding path program 2 times [2022-11-03 02:55:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:08,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702784937] [2022-11-03 02:55:08,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:08,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:08,481 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:08,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 02:55:08,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:55:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:09,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:10,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702784937] [2022-11-03 02:55:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702784937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453026333] [2022-11-03 02:55:10,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:10,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:10,768 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:10,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2022-11-03 02:55:11,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:11,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:55:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:11,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:11,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453026333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366713547] [2022-11-03 02:55:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:55:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:11,762 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:11,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-03 02:55:11,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:55:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:55:12,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366713547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:12,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:12,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 37 [2022-11-03 02:55:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313101238] [2022-11-03 02:55:12,531 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:12,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:55:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:55:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:55:12,533 INFO L87 Difference]: Start difference. First operand 1060 states and 1182 transitions. Second operand has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:14,783 INFO L93 Difference]: Finished difference Result 2147 states and 2396 transitions. [2022-11-03 02:55:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:55:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 02:55:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:14,785 INFO L225 Difference]: With dead ends: 2147 [2022-11-03 02:55:14,785 INFO L226 Difference]: Without dead ends: 1469 [2022-11-03 02:55:14,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 506 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 02:55:14,786 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 450 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 729 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:14,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 3080 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 524 Invalid, 0 Unknown, 729 Unchecked, 0.5s Time] [2022-11-03 02:55:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-11-03 02:55:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1068. [2022-11-03 02:55:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.1134020618556701) internal successors, (1188), 1067 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1188 transitions. [2022-11-03 02:55:14,985 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1188 transitions. Word has length 92 [2022-11-03 02:55:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:14,986 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1188 transitions. [2022-11-03 02:55:14,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.054054054054054) internal successors, (150), 37 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1188 transitions. [2022-11-03 02:55:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:55:14,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:14,988 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:15,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-03 02:55:15,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-03 02:55:15,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:15,594 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash -779795391, now seen corresponding path program 4 times [2022-11-03 02:55:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:15,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154041049] [2022-11-03 02:55:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:15,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:15,596 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 02:55:15,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:15,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:55:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:16,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:18,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154041049] [2022-11-03 02:55:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154041049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197827090] [2022-11-03 02:55:18,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:18,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:18,292 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:18,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-03 02:55:18,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:55:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:19,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197827090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:19,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948796907] [2022-11-03 02:55:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:19,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:19,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:19,539 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:19,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-03 02:55:19,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:55:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 86 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:55:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948796907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:20,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:20,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 41 [2022-11-03 02:55:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072769020] [2022-11-03 02:55:20,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:55:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:55:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:55:20,494 INFO L87 Difference]: Start difference. First operand 1068 states and 1188 transitions. Second operand has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:23,600 INFO L93 Difference]: Finished difference Result 3426 states and 3822 transitions. [2022-11-03 02:55:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 02:55:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-03 02:55:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:23,603 INFO L225 Difference]: With dead ends: 3426 [2022-11-03 02:55:23,603 INFO L226 Difference]: Without dead ends: 2419 [2022-11-03 02:55:23,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 679 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1097, Invalid=6043, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 02:55:23,604 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 603 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:23,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 2571 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 363 Invalid, 0 Unknown, 844 Unchecked, 0.4s Time] [2022-11-03 02:55:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2022-11-03 02:55:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1231. [2022-11-03 02:55:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 1.108130081300813) internal successors, (1363), 1230 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1363 transitions. [2022-11-03 02:55:23,777 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1363 transitions. Word has length 121 [2022-11-03 02:55:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:23,778 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1363 transitions. [2022-11-03 02:55:23,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1363 transitions. [2022-11-03 02:55:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:55:23,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:23,779 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:55:23,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-03 02:55:24,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-03 02:55:24,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2022-11-03 02:55:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:24,380 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1591302581, now seen corresponding path program 4 times [2022-11-03 02:55:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:24,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686110708] [2022-11-03 02:55:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:24,382 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 02:55:24,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:24,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:55:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:25,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:29,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686110708] [2022-11-03 02:55:29,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686110708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110345545] [2022-11-03 02:55:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:29,601 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:29,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 02:55:30,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:30,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:55:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:30,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110345545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716328315] [2022-11-03 02:55:30,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:55:30,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:30,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:30,984 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:30,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-03 02:55:31,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:55:31,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:55:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:31,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:55:32,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716328315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:32,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:32,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 63 [2022-11-03 02:55:32,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735326510] [2022-11-03 02:55:32,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:32,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 02:55:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 02:55:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3753, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 02:55:32,070 INFO L87 Difference]: Start difference. First operand 1231 states and 1363 transitions. Second operand has 63 states, 63 states have (on average 2.5714285714285716) internal successors, (162), 63 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 02:55:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:37,344 INFO L93 Difference]: Finished difference Result 2581 states and 2853 transitions. [2022-11-03 02:55:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:55:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.5714285714285716) internal successors, (162), 63 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-03 02:55:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:37,346 INFO L225 Difference]: With dead ends: 2581 [2022-11-03 02:55:37,346 INFO L226 Difference]: Without dead ends: 1781 [2022-11-03 02:55:37,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 654 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=989, Invalid=12583, Unknown=0, NotChecked=0, Total=13572 [2022-11-03 02:55:37,347 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 506 mSDsluCounter, 6866 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 7053 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2168 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:37,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 7053 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 874 Invalid, 0 Unknown, 2168 Unchecked, 0.9s Time] [2022-11-03 02:55:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-11-03 02:55:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1323. [2022-11-03 02:55:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.1059001512859303) internal successors, (1462), 1322 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1462 transitions. [2022-11-03 02:55:37,553 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1462 transitions. Word has length 121 [2022-11-03 02:55:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:37,553 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1462 transitions. [2022-11-03 02:55:37,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.5714285714285716) internal successors, (162), 63 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 02:55:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1462 transitions. [2022-11-03 02:55:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:55:37,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:37,555 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:37,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-03 02:55:37,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:37,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:38,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:38,156 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2143588741, now seen corresponding path program 3 times [2022-11-03 02:55:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:38,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40013102] [2022-11-03 02:55:38,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:55:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:38,158 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 02:55:38,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:55:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:55:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:40,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:46,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:55:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40013102] [2022-11-03 02:55:46,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40013102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1287087452] [2022-11-03 02:55:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:55:46,800 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:55:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:55:46,801 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:55:46,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-03 02:55:47,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:55:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:55:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1287087452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660439514] [2022-11-03 02:55:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:55:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:49,784 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:49,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-03 02:55:49,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:55:49,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:55:49,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 82 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:55:52,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660439514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:52,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:52,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30, 30, 30] total 58 [2022-11-03 02:55:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185379054] [2022-11-03 02:55:52,633 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:52,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:55:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:55:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:55:52,635 INFO L87 Difference]: Start difference. First operand 1323 states and 1462 transitions. Second operand has 58 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:55,602 INFO L93 Difference]: Finished difference Result 1458 states and 1613 transitions. [2022-11-03 02:55:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:55:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-03 02:55:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:55,603 INFO L225 Difference]: With dead ends: 1458 [2022-11-03 02:55:55,603 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:55:55,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 662 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=580, Invalid=5582, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:55:55,605 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 281 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 896 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:55,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1520 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 202 Invalid, 0 Unknown, 896 Unchecked, 0.3s Time] [2022-11-03 02:55:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:55:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:55:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:55:55,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-11-03 02:55:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:55,606 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:55:55,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:55:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:55:55,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:55:55,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:55:55,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:55,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:56,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:56,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879dd7e0-a531-44cc-937d-83b962ec8e7e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:56,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.