./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh --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 c505ae1adfc08ba258d60bd75ac11e8743fcfab06e2df8bbc0556c70ed343ff7 --- 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-2329fc7 [2022-12-14 08:02:16,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:02:16,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:02:16,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:02:16,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:02:16,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:02:16,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:02:16,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:02:16,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:02:16,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:02:16,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:02:16,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:02:16,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:02:16,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:02:16,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:02:16,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:02:16,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:02:16,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:02:16,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:02:16,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:02:16,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:02:16,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:02:16,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:02:16,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:02:16,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:02:16,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:02:16,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:02:16,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:02:16,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:02:16,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:02:16,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:02:16,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:02:16,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:02:16,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:02:16,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:02:16,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:02:16,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:02:16,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:02:16,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:02:16,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:02:16,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:02:16,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:02:16,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:02:16,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:02:16,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:02:16,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:02:16,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:02:16,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:02:16,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:02:16,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:02:16,884 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:02:16,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:02:16,884 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:02:16,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:02:16,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:02:16,885 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:02:16,885 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:02:16,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:02:16,885 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:02:16,886 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:02:16,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:02:16,886 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:02:16,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:02:16,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:02:16,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:02:16,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:02:16,889 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:02:16,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:02:16,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:02:16,889 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:02:16,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:02:16,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:02:16,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:02:16,890 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_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c505ae1adfc08ba258d60bd75ac11e8743fcfab06e2df8bbc0556c70ed343ff7 [2022-12-14 08:02:17,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:02:17,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:02:17,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:02:17,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:02:17,092 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:02:17,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-12-14 08:02:19,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:02:19,997 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:02:19,997 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-12-14 08:02:20,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/data/c5b8b7347/9e0a6177d240460fa66bcab289ffccc7/FLAG5589b1059 [2022-12-14 08:02:20,036 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/data/c5b8b7347/9e0a6177d240460fa66bcab289ffccc7 [2022-12-14 08:02:20,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:02:20,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:02:20,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:02:20,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:02:20,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:02:20,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:02:20" (1/1) ... [2022-12-14 08:02:20,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655e340e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:20, skipping insertion in model container [2022-12-14 08:02:20,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:02:20" (1/1) ... [2022-12-14 08:02:20,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:02:20,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:02:20,368 WARN L237 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_e095cef5-184f-4175-8cca-b51de680e73b/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[11668,11681] [2022-12-14 08:02:20,407 WARN L237 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_e095cef5-184f-4175-8cca-b51de680e73b/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[18958,18971] [2022-12-14 08:02:20,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:02:20,936 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:02:20,958 WARN L237 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_e095cef5-184f-4175-8cca-b51de680e73b/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[11668,11681] [2022-12-14 08:02:20,968 WARN L237 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_e095cef5-184f-4175-8cca-b51de680e73b/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[18958,18971] [2022-12-14 08:02:21,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:02:21,346 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:02:21,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21 WrapperNode [2022-12-14 08:02:21,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:02:21,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:02:21,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:02:21,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:02:21,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,623 INFO L138 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5068 [2022-12-14 08:02:21,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:02:21,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:02:21,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:02:21,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:02:21,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:02:21,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:02:21,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:02:21,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:02:21,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (1/1) ... [2022-12-14 08:02:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:02:21,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:02:21,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:02:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095cef5-184f-4175-8cca-b51de680e73b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:02:21,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:02:21,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:02:21,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:02:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:02:22,087 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:02:22,089 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:02:25,680 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:03:57,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:03:57,413 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:03:57,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:03:57 BoogieIcfgContainer [2022-12-14 08:03:57,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:03:57,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:03:57,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:03:57,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:03:57,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:02:20" (1/3) ... [2022-12-14 08:03:57,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad52a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:03:57, skipping insertion in model container [2022-12-14 08:03:57,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:02:21" (2/3) ... [2022-12-14 08:03:57,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad52a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:03:57, skipping insertion in model container [2022-12-14 08:03:57,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:03:57" (3/3) ... [2022-12-14 08:03:57,420 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-12-14 08:03:57,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:03:57,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:03:57,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:03:57,472 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;@34ccd569, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:03:57,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:03:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:03:57,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:03:57,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:03:57,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:03:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:03:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1711571880, now seen corresponding path program 1 times [2022-12-14 08:03:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:03:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604850675] [2022-12-14 08:03:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:03:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:03:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:03:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:03:57,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:03:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604850675] [2022-12-14 08:03:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604850675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:03:57,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:03:57,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:03:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950428495] [2022-12-14 08:03:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:03:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:03:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:03:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:03:57,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:03:57,757 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:03:58,340 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-12-14 08:03:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:03:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-14 08:03:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:03:58,347 INFO L225 Difference]: With dead ends: 47 [2022-12-14 08:03:58,348 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 08:03:58,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:03:58,352 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:03:58,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:03:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 08:03:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-14 08:03:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 08:03:58,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2022-12-14 08:03:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:03:58,374 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 08:03:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 08:03:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:03:58,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:03:58,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:03:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:03:58,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:03:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:03:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash -931092763, now seen corresponding path program 1 times [2022-12-14 08:03:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:03:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31857670] [2022-12-14 08:03:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:03:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:03:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:03:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:03:59,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:03:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31857670] [2022-12-14 08:03:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31857670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:03:59,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:03:59,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:03:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62386985] [2022-12-14 08:03:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:03:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:03:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:03:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:03:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:03:59,097 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:03:59,737 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-14 08:03:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:03:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-12-14 08:03:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:03:59,738 INFO L225 Difference]: With dead ends: 42 [2022-12-14 08:03:59,738 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:03:59,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:03:59,739 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:03:59,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:03:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:03:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-12-14 08:03:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 08:03:59,746 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2022-12-14 08:03:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:03:59,746 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 08:03:59,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:03:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 08:03:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:03:59,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:03:59,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:03:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:03:59,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:03:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:03:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1409424320, now seen corresponding path program 1 times [2022-12-14 08:03:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:03:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58360051] [2022-12-14 08:03:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:03:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:03:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:03:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:03:59,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:03:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58360051] [2022-12-14 08:03:59,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58360051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:03:59,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:03:59,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:03:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868912431] [2022-12-14 08:03:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:03:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:03:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:03:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:03:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:03:59,996 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:00,507 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-12-14 08:04:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:04:00,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-14 08:04:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:00,508 INFO L225 Difference]: With dead ends: 42 [2022-12-14 08:04:00,508 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:04:00,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:04:00,510 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:00,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:04:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:04:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-12-14 08:04:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 08:04:00,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-12-14 08:04:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:00,515 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 08:04:00,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 08:04:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:04:00,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:00,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:00,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:04:00,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:04:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1530882227, now seen corresponding path program 1 times [2022-12-14 08:04:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:04:00,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251736966] [2022-12-14 08:04:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:04:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:01,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:04:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251736966] [2022-12-14 08:04:01,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251736966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:01,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:01,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:04:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654920184] [2022-12-14 08:04:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:04:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:04:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:04:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:04:01,009 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:01,608 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-12-14 08:04:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:04:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-14 08:04:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:01,609 INFO L225 Difference]: With dead ends: 42 [2022-12-14 08:04:01,609 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:04:01,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:04:01,610 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:01,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:04:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:04:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-12-14 08:04:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-14 08:04:01,614 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2022-12-14 08:04:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:01,614 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-14 08:04:01,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-14 08:04:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:04:01,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:01,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:01,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:04:01,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:04:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -216941664, now seen corresponding path program 1 times [2022-12-14 08:04:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:04:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995636896] [2022-12-14 08:04:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:04:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:01,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:04:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995636896] [2022-12-14 08:04:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995636896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:01,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:01,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:04:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763256617] [2022-12-14 08:04:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:04:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:04:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:04:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:04:01,730 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:02,307 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-12-14 08:04:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:04:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-12-14 08:04:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:02,308 INFO L225 Difference]: With dead ends: 46 [2022-12-14 08:04:02,308 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 08:04:02,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:04:02,309 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:02,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:04:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 08:04:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2022-12-14 08:04:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 08:04:02,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2022-12-14 08:04:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:02,316 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 08:04:02,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 08:04:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:04:02,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:02,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:02,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:04:02,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:04:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash 677977227, now seen corresponding path program 1 times [2022-12-14 08:04:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:04:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71421046] [2022-12-14 08:04:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:04:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat