./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0 --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 32bit --witnessprinter.graph.data.programhash c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a --- 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-e04fb08 [2022-11-16 16:18:30,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:18:30,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:18:30,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:18:30,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:18:30,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:18:30,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:18:30,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:18:30,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:18:30,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:18:30,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:18:30,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:18:30,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:18:30,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:18:30,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:18:30,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:18:30,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:18:30,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:18:30,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:18:30,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:18:30,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:18:30,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:18:30,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:18:30,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:18:30,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:18:30,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:18:30,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:18:30,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:18:30,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:18:30,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:18:30,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:18:30,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:18:30,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:18:30,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:18:30,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:18:30,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:18:30,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:18:30,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:18:30,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:18:30,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:18:30,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:18:30,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:18:30,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:18:30,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:18:30,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:18:30,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:18:30,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:18:30,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:18:30,825 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:18:30,825 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:18:30,826 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:18:30,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:18:30,826 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:18:30,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:18:30,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:18:30,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:18:30,827 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:18:30,828 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:18:30,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:18:30,828 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:18:30,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:18:30,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:18:30,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:18:30,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:18:30,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:18:30,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:18:30,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:18:30,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:18:30,831 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:18:30,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:18:30,832 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:18:30,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:18:30,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:18:30,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:18:30,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:30,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:18:30,833 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:18:30,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:18:30,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:18:30,834 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:18:30,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:18:30,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:18:30,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:18:30,835 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_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a [2022-11-16 16:18:31,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:18:31,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:18:31,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:18:31,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:18:31,179 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:18:31,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-16 16:18:31,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/data/20dc9248a/6e14b7d052f34cf482f2d4bd1d8a0cdf/FLAGff30c8a1c [2022-11-16 16:18:31,892 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:18:31,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-16 16:18:31,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/data/20dc9248a/6e14b7d052f34cf482f2d4bd1d8a0cdf/FLAGff30c8a1c [2022-11-16 16:18:32,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/data/20dc9248a/6e14b7d052f34cf482f2d4bd1d8a0cdf [2022-11-16 16:18:32,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:18:32,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:18:32,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:32,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:18:32,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:18:32,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:32" (1/1) ... [2022-11-16 16:18:32,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f0d51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:32, skipping insertion in model container [2022-11-16 16:18:32,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:32" (1/1) ... [2022-11-16 16:18:32,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:18:32,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:18:32,869 WARN L229 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_bdfa3792-771d-49a4-9049-a6314b4c8bd2/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-16 16:18:32,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:32,898 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:18:33,236 WARN L229 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_bdfa3792-771d-49a4-9049-a6314b4c8bd2/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-16 16:18:33,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:33,262 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:18:33,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33 WrapperNode [2022-11-16 16:18:33,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:33,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:33,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:18:33,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:18:33,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,477 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-16 16:18:33,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:33,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:18:33,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:18:33,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:18:33,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:18:33,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:18:33,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:18:33,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:18:33,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (1/1) ... [2022-11-16 16:18:33,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:33,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:18:33,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:18:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:18:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:18:33,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:18:33,826 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:18:33,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:18:35,834 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:18:36,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:18:36,198 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 16:18:36,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:36 BoogieIcfgContainer [2022-11-16 16:18:36,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:18:36,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:18:36,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:18:36,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:18:36,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:18:32" (1/3) ... [2022-11-16 16:18:36,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3765709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:36, skipping insertion in model container [2022-11-16 16:18:36,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:33" (2/3) ... [2022-11-16 16:18:36,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3765709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:36, skipping insertion in model container [2022-11-16 16:18:36,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:36" (3/3) ... [2022-11-16 16:18:36,211 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2022-11-16 16:18:36,232 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:18:36,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:18:36,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:18:36,313 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;@65ad1352, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:18:36,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:18:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 16:18:36,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:36,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:36,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 209354234, now seen corresponding path program 1 times [2022-11-16 16:18:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614112518] [2022-11-16 16:18:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:37,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614112518] [2022-11-16 16:18:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614112518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:37,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:37,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407480135] [2022-11-16 16:18:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:37,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:37,434 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:38,539 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-16 16:18:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-16 16:18:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:38,554 INFO L225 Difference]: With dead ends: 440 [2022-11-16 16:18:38,562 INFO L226 Difference]: Without dead ends: 289 [2022-11-16 16:18:38,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:38,569 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:38,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 16:18:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-16 16:18:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-16 16:18:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.6041666666666667) internal successors, (462), 288 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 462 transitions. [2022-11-16 16:18:38,661 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 462 transitions. Word has length 143 [2022-11-16 16:18:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:38,665 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 462 transitions. [2022-11-16 16:18:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 462 transitions. [2022-11-16 16:18:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-16 16:18:38,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:38,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:38,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:18:38,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1094394521, now seen corresponding path program 1 times [2022-11-16 16:18:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:38,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778765647] [2022-11-16 16:18:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:38,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:38,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778765647] [2022-11-16 16:18:38,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778765647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:38,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:38,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957021797] [2022-11-16 16:18:38,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:38,936 INFO L87 Difference]: Start difference. First operand 289 states and 462 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:39,893 INFO L93 Difference]: Finished difference Result 863 states and 1383 transitions. [2022-11-16 16:18:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-16 16:18:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:39,896 INFO L225 Difference]: With dead ends: 863 [2022-11-16 16:18:39,897 INFO L226 Difference]: Without dead ends: 575 [2022-11-16 16:18:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:39,899 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:39,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 16:18:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-16 16:18:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-16 16:18:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5609756097560976) internal successors, (896), 574 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 896 transitions. [2022-11-16 16:18:39,945 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 896 transitions. Word has length 151 [2022-11-16 16:18:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:39,947 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 896 transitions. [2022-11-16 16:18:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 896 transitions. [2022-11-16 16:18:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-16 16:18:39,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:39,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:39,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:18:39,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -316844002, now seen corresponding path program 1 times [2022-11-16 16:18:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:39,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174921538] [2022-11-16 16:18:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:18:40,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174921538] [2022-11-16 16:18:40,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174921538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:40,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:18:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534327740] [2022-11-16 16:18:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:18:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:18:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:40,925 INFO L87 Difference]: Start difference. First operand 575 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:41,987 INFO L93 Difference]: Finished difference Result 1290 states and 2054 transitions. [2022-11-16 16:18:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:18:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-16 16:18:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:41,991 INFO L225 Difference]: With dead ends: 1290 [2022-11-16 16:18:41,991 INFO L226 Difference]: Without dead ends: 575 [2022-11-16 16:18:41,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:41,994 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 220 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:41,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 11 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 16:18:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-16 16:18:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-16 16:18:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3745644599303135) internal successors, (789), 574 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 789 transitions. [2022-11-16 16:18:42,029 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 789 transitions. Word has length 158 [2022-11-16 16:18:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:42,029 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 789 transitions. [2022-11-16 16:18:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 789 transitions. [2022-11-16 16:18:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-16 16:18:42,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:42,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:42,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:18:42,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash -13278496, now seen corresponding path program 1 times [2022-11-16 16:18:42,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:42,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244472454] [2022-11-16 16:18:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:42,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:42,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:42,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244472454] [2022-11-16 16:18:42,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244472454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:42,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:42,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735742359] [2022-11-16 16:18:42,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:42,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:42,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:42,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:42,592 INFO L87 Difference]: Start difference. First operand 575 states and 789 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:43,271 INFO L93 Difference]: Finished difference Result 1723 states and 2365 transitions. [2022-11-16 16:18:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-16 16:18:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:43,278 INFO L225 Difference]: With dead ends: 1723 [2022-11-16 16:18:43,278 INFO L226 Difference]: Without dead ends: 1149 [2022-11-16 16:18:43,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:43,280 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:43,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 21 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:18:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-16 16:18:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-16 16:18:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.3490401396160558) internal successors, (1546), 1146 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1546 transitions. [2022-11-16 16:18:43,313 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1546 transitions. Word has length 171 [2022-11-16 16:18:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:43,314 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1546 transitions. [2022-11-16 16:18:43,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1546 transitions. [2022-11-16 16:18:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-16 16:18:43,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:43,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:43,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:18:43,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash 10696099, now seen corresponding path program 1 times [2022-11-16 16:18:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499088617] [2022-11-16 16:18:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:44,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499088617] [2022-11-16 16:18:44,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499088617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:44,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:44,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:18:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429363483] [2022-11-16 16:18:44,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:44,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:18:44,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:18:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:44,076 INFO L87 Difference]: Start difference. First operand 1147 states and 1546 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:45,328 INFO L93 Difference]: Finished difference Result 3006 states and 4062 transitions. [2022-11-16 16:18:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:18:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-16 16:18:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:45,337 INFO L225 Difference]: With dead ends: 3006 [2022-11-16 16:18:45,337 INFO L226 Difference]: Without dead ends: 1719 [2022-11-16 16:18:45,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:45,346 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:45,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 69 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 16:18:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-16 16:18:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-16 16:18:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.3329452852153667) internal successors, (2290), 1718 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2290 transitions. [2022-11-16 16:18:45,394 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2290 transitions. Word has length 174 [2022-11-16 16:18:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:45,396 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2290 transitions. [2022-11-16 16:18:45,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2290 transitions. [2022-11-16 16:18:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-16 16:18:45,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:45,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:45,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:18:45,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1441045118, now seen corresponding path program 1 times [2022-11-16 16:18:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:45,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342654300] [2022-11-16 16:18:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:45,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:45,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342654300] [2022-11-16 16:18:45,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342654300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:45,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103846537] [2022-11-16 16:18:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:45,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:45,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:45,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:45,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:18:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:18:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 16:18:46,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:46,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103846537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:46,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:18:46,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 16:18:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864924464] [2022-11-16 16:18:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:46,485 INFO L87 Difference]: Start difference. First operand 1719 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:47,179 INFO L93 Difference]: Finished difference Result 4009 states and 5362 transitions. [2022-11-16 16:18:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:47,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-11-16 16:18:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:47,187 INFO L225 Difference]: With dead ends: 4009 [2022-11-16 16:18:47,187 INFO L226 Difference]: Without dead ends: 2291 [2022-11-16 16:18:47,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:47,191 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:47,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 186 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:18:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-16 16:18:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-11-16 16:18:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3231441048034935) internal successors, (3030), 2290 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3030 transitions. [2022-11-16 16:18:47,275 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3030 transitions. Word has length 181 [2022-11-16 16:18:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:47,276 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3030 transitions. [2022-11-16 16:18:47,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3030 transitions. [2022-11-16 16:18:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-16 16:18:47,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:47,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:47,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:47,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:47,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1296192757, now seen corresponding path program 1 times [2022-11-16 16:18:47,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:47,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001837939] [2022-11-16 16:18:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:47,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:18:47,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001837939] [2022-11-16 16:18:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001837939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:47,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:47,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341028234] [2022-11-16 16:18:47,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:47,723 INFO L87 Difference]: Start difference. First operand 2291 states and 3030 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:48,445 INFO L93 Difference]: Finished difference Result 6585 states and 8765 transitions. [2022-11-16 16:18:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-11-16 16:18:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:48,459 INFO L225 Difference]: With dead ends: 6585 [2022-11-16 16:18:48,459 INFO L226 Difference]: Without dead ends: 4295 [2022-11-16 16:18:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:48,463 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:48,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 64 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:18:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2022-11-16 16:18:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 4293. [2022-11-16 16:18:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.3059179869524697) internal successors, (5605), 4292 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5605 transitions. [2022-11-16 16:18:48,565 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5605 transitions. Word has length 183 [2022-11-16 16:18:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:48,566 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 5605 transitions. [2022-11-16 16:18:48,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5605 transitions. [2022-11-16 16:18:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 16:18:48,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:48,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:48,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 16:18:48,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1679027186, now seen corresponding path program 1 times [2022-11-16 16:18:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:48,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342368833] [2022-11-16 16:18:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:18:49,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342368833] [2022-11-16 16:18:49,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342368833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169190673] [2022-11-16 16:18:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:49,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:49,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:49,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:18:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:49,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:18:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:18:49,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169190673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:49,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:18:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 16:18:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679273645] [2022-11-16 16:18:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:49,270 INFO L87 Difference]: Start difference. First operand 4293 states and 5605 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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) [2022-11-16 16:18:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:50,096 INFO L93 Difference]: Finished difference Result 10444 states and 13940 transitions. [2022-11-16 16:18:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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 185 [2022-11-16 16:18:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:50,118 INFO L225 Difference]: With dead ends: 10444 [2022-11-16 16:18:50,118 INFO L226 Difference]: Without dead ends: 6152 [2022-11-16 16:18:50,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:50,126 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:50,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 224 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:18:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-11-16 16:18:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 6152. [2022-11-16 16:18:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 1.2302064704926028) internal successors, (7567), 6151 states have internal predecessors, (7567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 7567 transitions. [2022-11-16 16:18:50,327 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 7567 transitions. Word has length 185 [2022-11-16 16:18:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:50,328 INFO L495 AbstractCegarLoop]: Abstraction has 6152 states and 7567 transitions. [2022-11-16 16:18:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 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) [2022-11-16 16:18:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 7567 transitions. [2022-11-16 16:18:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-16 16:18:50,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:50,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:50,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:50,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 16:18:50,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash -683614312, now seen corresponding path program 1 times [2022-11-16 16:18:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:50,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79042463] [2022-11-16 16:18:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:50,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:18:50,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79042463] [2022-11-16 16:18:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79042463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869235821] [2022-11-16 16:18:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:50,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:50,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:50,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:18:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:18:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:18:51,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:51,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869235821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:51,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:18:51,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 16:18:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667052287] [2022-11-16 16:18:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:51,485 INFO L87 Difference]: Start difference. First operand 6152 states and 7567 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 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) [2022-11-16 16:18:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:52,291 INFO L93 Difference]: Finished difference Result 16593 states and 20325 transitions. [2022-11-16 16:18:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-11-16 16:18:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:52,341 INFO L225 Difference]: With dead ends: 16593 [2022-11-16 16:18:52,341 INFO L226 Difference]: Without dead ends: 10442 [2022-11-16 16:18:52,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:52,350 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:52,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:18:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2022-11-16 16:18:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10442. [2022-11-16 16:18:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 1.1952878076812565) internal successors, (12480), 10441 states have internal predecessors, (12480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 12480 transitions. [2022-11-16 16:18:52,576 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 12480 transitions. Word has length 191 [2022-11-16 16:18:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:52,577 INFO L495 AbstractCegarLoop]: Abstraction has 10442 states and 12480 transitions. [2022-11-16 16:18:52,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 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) [2022-11-16 16:18:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 12480 transitions. [2022-11-16 16:18:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-16 16:18:52,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:52,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:52,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:52,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:52,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1766432381, now seen corresponding path program 1 times [2022-11-16 16:18:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:52,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349601364] [2022-11-16 16:18:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:53,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349601364] [2022-11-16 16:18:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349601364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:53,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:53,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56445092] [2022-11-16 16:18:53,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:53,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:53,301 INFO L87 Difference]: Start difference. First operand 10442 states and 12480 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2022-11-16 16:18:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:54,123 INFO L93 Difference]: Finished difference Result 28607 states and 34075 transitions. [2022-11-16 16:18:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:54,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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 194 [2022-11-16 16:18:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:54,170 INFO L225 Difference]: With dead ends: 28607 [2022-11-16 16:18:54,171 INFO L226 Difference]: Without dead ends: 18452 [2022-11-16 16:18:54,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:54,184 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:54,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 27 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:18:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18452 states. [2022-11-16 16:18:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18452 to 18450. [2022-11-16 16:18:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18450 states, 18449 states have (on average 1.183532982817497) internal successors, (21835), 18449 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18450 states to 18450 states and 21835 transitions. [2022-11-16 16:18:54,666 INFO L78 Accepts]: Start accepts. Automaton has 18450 states and 21835 transitions. Word has length 194 [2022-11-16 16:18:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:54,667 INFO L495 AbstractCegarLoop]: Abstraction has 18450 states and 21835 transitions. [2022-11-16 16:18:54,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2022-11-16 16:18:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 18450 states and 21835 transitions. [2022-11-16 16:18:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 16:18:54,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:54,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 16:18:54,687 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2143627689, now seen corresponding path program 1 times [2022-11-16 16:18:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557825107] [2022-11-16 16:18:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:18:55,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557825107] [2022-11-16 16:18:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557825107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:55,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812163655] [2022-11-16 16:18:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:55,286 INFO L87 Difference]: Start difference. First operand 18450 states and 21835 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:56,095 INFO L93 Difference]: Finished difference Result 37042 states and 43825 transitions. [2022-11-16 16:18:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-11-16 16:18:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:56,139 INFO L225 Difference]: With dead ends: 37042 [2022-11-16 16:18:56,140 INFO L226 Difference]: Without dead ends: 19022 [2022-11-16 16:18:56,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:56,158 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:56,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:18:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19022 states. [2022-11-16 16:18:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19022 to 19022. [2022-11-16 16:18:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19022 states, 19021 states have (on average 1.1800641396351401) internal successors, (22446), 19021 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19022 states to 19022 states and 22446 transitions. [2022-11-16 16:18:56,611 INFO L78 Accepts]: Start accepts. Automaton has 19022 states and 22446 transitions. Word has length 205 [2022-11-16 16:18:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:56,612 INFO L495 AbstractCegarLoop]: Abstraction has 19022 states and 22446 transitions. [2022-11-16 16:18:56,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 19022 states and 22446 transitions. [2022-11-16 16:18:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-16 16:18:56,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:56,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 16:18:56,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1334401191, now seen corresponding path program 1 times [2022-11-16 16:18:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:56,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156714639] [2022-11-16 16:18:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:57,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156714639] [2022-11-16 16:18:57,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156714639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:57,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:57,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311427303] [2022-11-16 16:18:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:57,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:57,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:57,106 INFO L87 Difference]: Start difference. First operand 19022 states and 22446 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:57,942 INFO L93 Difference]: Finished difference Result 44194 states and 52283 transitions. [2022-11-16 16:18:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-11-16 16:18:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:57,994 INFO L225 Difference]: With dead ends: 44194 [2022-11-16 16:18:57,995 INFO L226 Difference]: Without dead ends: 26031 [2022-11-16 16:18:58,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:58,011 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:58,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 60 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:18:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2022-11-16 16:18:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 24456. [2022-11-16 16:18:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24456 states, 24455 states have (on average 1.1858924555305663) internal successors, (29001), 24455 states have internal predecessors, (29001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24456 states to 24456 states and 29001 transitions. [2022-11-16 16:18:58,481 INFO L78 Accepts]: Start accepts. Automaton has 24456 states and 29001 transitions. Word has length 218 [2022-11-16 16:18:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:58,482 INFO L495 AbstractCegarLoop]: Abstraction has 24456 states and 29001 transitions. [2022-11-16 16:18:58,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 24456 states and 29001 transitions. [2022-11-16 16:18:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-16 16:18:58,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:58,500 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 16:18:58,500 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1239370622, now seen corresponding path program 1 times [2022-11-16 16:18:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135278258] [2022-11-16 16:18:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 16:18:59,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135278258] [2022-11-16 16:18:59,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135278258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34528959] [2022-11-16 16:18:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:59,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:59,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:59,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfa3792-771d-49a4-9049-a6314b4c8bd2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:18:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:18:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 16:18:59,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 16:19:00,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34528959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563784561] [2022-11-16 16:19:00,112 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-16 16:19:00,112 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:19:00,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:19:00,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:19:00,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:31:01,020 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-16 16:31:03,102 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 126048 conjuctions. This might take some time... [2022-11-16 16:31:16,219 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions. [2022-11-16 16:31:16,257 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-16 16:31:17,836 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 126048 conjuctions. This might take some time... [2022-11-16 16:31:30,993 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions. [2022-11-16 16:31:33,726 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2022-11-16 16:31:35,329 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 126048 conjuctions. This might take some time... [2022-11-16 16:31:49,335 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 640 conjuctions.