./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/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 db9df7d135a21d792e3a2ca832f85f7c7fc22de6655b2cb0ba03be5cd467b7e3 --- 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 16:02:13,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:02:13,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:02:13,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:02:13,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:02:13,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:02:13,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:02:13,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:02:13,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:02:13,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:02:13,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:02:13,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:02:13,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:02:13,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:02:13,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:02:13,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:02:13,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:02:13,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:02:13,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:02:13,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:02:13,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:02:13,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:02:13,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:02:13,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:02:13,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:02:13,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:02:13,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:02:13,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:02:13,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:02:13,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:02:13,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:02:13,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:02:13,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:02:13,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:02:13,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:02:13,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:02:13,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:02:13,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:02:13,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:02:13,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:02:13,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:02:13,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:02:13,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:02:13,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:02:13,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:02:13,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:02:13,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:02:13,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:02:13,874 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:02:13,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:02:13,875 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:02:13,876 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:02:13,876 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:02:13,876 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:02:13,876 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:02:13,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:02:13,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:02:13,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:02:13,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:02:13,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:02:13,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:02:13,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:02:13,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:02:13,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:02:13,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:02:13,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:02:13,879 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:02:13,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:02:13,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:02:13,880 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:02:13,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:02:13,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:02:13,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:02:13,880 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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db9df7d135a21d792e3a2ca832f85f7c7fc22de6655b2cb0ba03be5cd467b7e3 [2022-12-14 16:02:14,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:02:14,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:02:14,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:02:14,098 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:02:14,098 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:02:14,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c [2022-12-14 16:02:16,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:02:17,100 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:02:17,100 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c [2022-12-14 16:02:17,134 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/data/5d4a475ae/65cb16c9f0804323a2b21d7efa230590/FLAG34aa3fe74 [2022-12-14 16:02:17,145 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/data/5d4a475ae/65cb16c9f0804323a2b21d7efa230590 [2022-12-14 16:02:17,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:02:17,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:02:17,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:02:17,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:02:17,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:02:17,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:02:17" (1/1) ... [2022-12-14 16:02:17,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145441ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:17, skipping insertion in model container [2022-12-14 16:02:17,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:02:17" (1/1) ... [2022-12-14 16:02:17,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:02:17,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:02:18,655 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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c[381679,381692] [2022-12-14 16:02:18,673 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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c[383339,383352] [2022-12-14 16:02:18,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:02:18,877 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:02:19,650 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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c[381679,381692] [2022-12-14 16:02:19,653 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_754811eb-3500-4c9a-ad3e-1a488e8fdee2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-1.c[383339,383352] [2022-12-14 16:02:19,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:02:19,699 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:02:19,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19 WrapperNode [2022-12-14 16:02:19,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:02:19,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:02:19,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:02:19,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:02:19,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:19,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,009 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-12-14 16:02:20,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:02:20,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:02:20,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:02:20,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:02:20,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,296 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:02:20,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:02:20,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:02:20,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:02:20,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (1/1) ... [2022-12-14 16:02:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:02:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:20,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:02:20,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:02:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:02:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 16:02:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:02:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:02:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:02:20,514 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:02:20,516 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:02:26,377 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:02:27,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:02:27,614 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 16:02:27,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:02:27 BoogieIcfgContainer [2022-12-14 16:02:27,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:02:27,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:02:27,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:02:27,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:02:27,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:02:17" (1/3) ... [2022-12-14 16:02:27,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ef92e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:02:27, skipping insertion in model container [2022-12-14 16:02:27,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:02:19" (2/3) ... [2022-12-14 16:02:27,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ef92e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:02:27, skipping insertion in model container [2022-12-14 16:02:27,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:02:27" (3/3) ... [2022-12-14 16:02:27,624 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.08.cil-1.c [2022-12-14 16:02:27,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:02:27,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 16:02:27,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:02:27,705 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;@29bd4d4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:02:27,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 16:02:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 16:02:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 16:02:27,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:27,721 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] [2022-12-14 16:02:27,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2028950132, now seen corresponding path program 1 times [2022-12-14 16:02:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:27,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245521554] [2022-12-14 16:02:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:28,004 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 16:02:28,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:28,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245521554] [2022-12-14 16:02:28,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245521554] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:28,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:28,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:02:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265707857] [2022-12-14 16:02:28,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:02:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:02:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:02:28,040 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 16:02:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:28,779 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-12-14 16:02:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:02:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-12-14 16:02:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:28,796 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 16:02:28,796 INFO L226 Difference]: Without dead ends: 1913 [2022-12-14 16:02:28,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:02:28,804 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:28,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:02:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-12-14 16:02:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-12-14 16:02:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 16:02:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-12-14 16:02:28,895 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-12-14 16:02:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:28,895 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-12-14 16:02:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 16:02:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-12-14 16:02:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:02:28,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:28,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:28,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:02:28,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1139913325, now seen corresponding path program 1 times [2022-12-14 16:02:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:28,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238361712] [2022-12-14 16:02:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 16:02:29,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238361712] [2022-12-14 16:02:29,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238361712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522268172] [2022-12-14 16:02:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:29,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:29,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:02:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:02:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 16:02:29,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:29,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522268172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:29,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:29,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 16:02:29,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194956029] [2022-12-14 16:02:29,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:29,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:29,265 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:29,678 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-12-14 16:02:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 16:02:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:29,687 INFO L225 Difference]: With dead ends: 2437 [2022-12-14 16:02:29,687 INFO L226 Difference]: Without dead ends: 2171 [2022-12-14 16:02:29,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:29,690 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:29,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-12-14 16:02:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-12-14 16:02:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 16:02:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-12-14 16:02:29,742 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-12-14 16:02:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:29,743 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-12-14 16:02:29,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-12-14 16:02:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:02:29,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:29,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:29,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:02:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:29,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 280344589, now seen corresponding path program 1 times [2022-12-14 16:02:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826988670] [2022-12-14 16:02:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:29,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 16:02:30,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826988670] [2022-12-14 16:02:30,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826988670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206782596] [2022-12-14 16:02:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:30,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:30,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:02:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:02:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 16:02:30,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206782596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:30,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:30,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 16:02:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679716288] [2022-12-14 16:02:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:30,243 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:30,660 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-12-14 16:02:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 16:02:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:30,670 INFO L225 Difference]: With dead ends: 3196 [2022-12-14 16:02:30,670 INFO L226 Difference]: Without dead ends: 2675 [2022-12-14 16:02:30,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:30,673 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:30,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3439 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-12-14 16:02:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-12-14 16:02:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 16:02:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-12-14 16:02:30,736 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-12-14 16:02:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:30,736 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-12-14 16:02:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-12-14 16:02:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:02:30,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:30,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:30,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:02:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:30,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash -913898067, now seen corresponding path program 1 times [2022-12-14 16:02:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:30,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024577589] [2022-12-14 16:02:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 16:02:31,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024577589] [2022-12-14 16:02:31,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024577589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929626224] [2022-12-14 16:02:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:31,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:31,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:02:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:02:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 16:02:31,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:31,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929626224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:31,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:31,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 16:02:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646399783] [2022-12-14 16:02:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:31,218 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:31,676 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-12-14 16:02:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 16:02:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:31,694 INFO L225 Difference]: With dead ends: 4690 [2022-12-14 16:02:31,695 INFO L226 Difference]: Without dead ends: 3667 [2022-12-14 16:02:31,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:31,701 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:31,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-12-14 16:02:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-12-14 16:02:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 16:02:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-12-14 16:02:31,879 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-12-14 16:02:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:31,879 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-12-14 16:02:31,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-12-14 16:02:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:02:31,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:31,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:31,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:02:32,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:32,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:32,087 INFO L85 PathProgramCache]: Analyzing trace with hash 912217101, now seen corresponding path program 1 times [2022-12-14 16:02:32,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:32,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963911078] [2022-12-14 16:02:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:32,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 16:02:32,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963911078] [2022-12-14 16:02:32,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963911078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:32,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786247617] [2022-12-14 16:02:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:32,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:32,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:32,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:32,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:02:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:02:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 16:02:32,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:32,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786247617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:32,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:32,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 16:02:32,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529392037] [2022-12-14 16:02:32,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:32,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:32,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:32,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:32,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:32,436 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:32,922 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-12-14 16:02:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 16:02:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:32,938 INFO L225 Difference]: With dead ends: 7630 [2022-12-14 16:02:32,938 INFO L226 Difference]: Without dead ends: 5619 [2022-12-14 16:02:32,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:02:32,945 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:32,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-12-14 16:02:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-12-14 16:02:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 16:02:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-12-14 16:02:33,080 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-12-14 16:02:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:33,080 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-12-14 16:02:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 16:02:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-12-14 16:02:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:02:33,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:33,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:33,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:02:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:33,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -780136019, now seen corresponding path program 1 times [2022-12-14 16:02:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:33,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678879385] [2022-12-14 16:02:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 16:02:33,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678879385] [2022-12-14 16:02:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678879385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:33,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:02:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841312291] [2022-12-14 16:02:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:33,473 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 16:02:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:33,902 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-12-14 16:02:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-12-14 16:02:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:33,928 INFO L225 Difference]: With dead ends: 8675 [2022-12-14 16:02:33,928 INFO L226 Difference]: Without dead ends: 6657 [2022-12-14 16:02:33,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:33,936 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:33,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-12-14 16:02:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-12-14 16:02:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 16:02:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-12-14 16:02:34,132 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-12-14 16:02:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:34,132 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-12-14 16:02:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 16:02:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-12-14 16:02:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 16:02:34,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:34,142 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, 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] [2022-12-14 16:02:34,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 16:02:34,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1668951491, now seen corresponding path program 1 times [2022-12-14 16:02:34,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:34,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728784651] [2022-12-14 16:02:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:34,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 16:02:34,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728784651] [2022-12-14 16:02:34,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728784651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:34,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:34,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:02:34,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671889425] [2022-12-14 16:02:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:34,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:34,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:34,208 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:34,790 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-12-14 16:02:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 16:02:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:34,815 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 16:02:34,815 INFO L226 Difference]: Without dead ends: 10851 [2022-12-14 16:02:34,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:34,826 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:34,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-12-14 16:02:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-12-14 16:02:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 16:02:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-12-14 16:02:35,089 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-12-14 16:02:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:35,089 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-12-14 16:02:35,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-12-14 16:02:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 16:02:35,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:35,148 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, 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] [2022-12-14 16:02:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 16:02:35,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1421562111, now seen corresponding path program 1 times [2022-12-14 16:02:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:35,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040085136] [2022-12-14 16:02:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 16:02:35,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:35,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040085136] [2022-12-14 16:02:35,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040085136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:35,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:35,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:02:35,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315946930] [2022-12-14 16:02:35,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:35,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:35,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:35,205 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:35,906 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-12-14 16:02:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 16:02:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:35,971 INFO L225 Difference]: With dead ends: 28822 [2022-12-14 16:02:35,971 INFO L226 Difference]: Without dead ends: 19667 [2022-12-14 16:02:36,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:36,002 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:36,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-12-14 16:02:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-12-14 16:02:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 16:02:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-12-14 16:02:36,573 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-12-14 16:02:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:36,573 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-12-14 16:02:36,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-12-14 16:02:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 16:02:36,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:36,604 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, 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] [2022-12-14 16:02:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 16:02:36,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1298732855, now seen corresponding path program 1 times [2022-12-14 16:02:36,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496020198] [2022-12-14 16:02:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 16:02:36,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496020198] [2022-12-14 16:02:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496020198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:36,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:36,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:02:36,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385343261] [2022-12-14 16:02:36,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:36,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:36,661 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:37,906 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-12-14 16:02:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 16:02:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:38,008 INFO L225 Difference]: With dead ends: 54838 [2022-12-14 16:02:38,008 INFO L226 Difference]: Without dead ends: 36915 [2022-12-14 16:02:38,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:38,098 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:38,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-12-14 16:02:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-12-14 16:02:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 16:02:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-12-14 16:02:39,097 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-12-14 16:02:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:39,097 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-12-14 16:02:39,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-12-14 16:02:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 16:02:39,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:39,148 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, 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] [2022-12-14 16:02:39,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 16:02:39,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 66723141, now seen corresponding path program 1 times [2022-12-14 16:02:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:39,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992266410] [2022-12-14 16:02:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 16:02:39,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992266410] [2022-12-14 16:02:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992266410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:39,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:02:39,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:02:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749021895] [2022-12-14 16:02:39,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:39,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:39,210 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:41,312 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-12-14 16:02:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 16:02:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:41,493 INFO L225 Difference]: With dead ends: 105718 [2022-12-14 16:02:41,494 INFO L226 Difference]: Without dead ends: 70643 [2022-12-14 16:02:41,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:02:41,576 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:41,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-12-14 16:02:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-12-14 16:02:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 16:02:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-12-14 16:02:43,615 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-12-14 16:02:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:43,615 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-12-14 16:02:43,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-12-14 16:02:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 16:02:43,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:43,739 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 16:02:43,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1293595707, now seen corresponding path program 1 times [2022-12-14 16:02:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:43,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509588760] [2022-12-14 16:02:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 16:02:44,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509588760] [2022-12-14 16:02:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509588760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178356490] [2022-12-14 16:02:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:44,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:44,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:44,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:02:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:02:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 16:02:44,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:44,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178356490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:44,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:44,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:02:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069917862] [2022-12-14 16:02:44,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:44,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:44,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:44,261 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:02:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:47,153 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-12-14 16:02:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 16:02:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:47,403 INFO L225 Difference]: With dead ends: 133109 [2022-12-14 16:02:47,403 INFO L226 Difference]: Without dead ends: 98035 [2022-12-14 16:02:47,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:47,469 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:47,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-12-14 16:02:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-12-14 16:02:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 16:02:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-12-14 16:02:50,165 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-12-14 16:02:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:50,166 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-12-14 16:02:50,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:02:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-12-14 16:02:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 16:02:50,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:50,294 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:50,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 16:02:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:50,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655361, now seen corresponding path program 2 times [2022-12-14 16:02:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507161649] [2022-12-14 16:02:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:02:50,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507161649] [2022-12-14 16:02:50,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507161649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317756930] [2022-12-14 16:02:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:02:50,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:50,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:50,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:02:50,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 16:02:50,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:02:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:02:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 16:02:50,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317756930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:50,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:50,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:02:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970077515] [2022-12-14 16:02:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:50,867 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:02:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:54,284 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-12-14 16:02:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:02:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 16:02:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:54,460 INFO L225 Difference]: With dead ends: 135285 [2022-12-14 16:02:54,460 INFO L226 Difference]: Without dead ends: 85363 [2022-12-14 16:02:54,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:54,517 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:54,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:02:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-12-14 16:02:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-12-14 16:02:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 16:02:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-12-14 16:02:56,993 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-12-14 16:02:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:56,994 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-12-14 16:02:56,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:02:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions. [2022-12-14 16:02:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 16:02:57,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:57,124 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, 3, 3, 3, 3, 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] [2022-12-14 16:02:57,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 16:02:57,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 16:02:57,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1266014591, now seen corresponding path program 1 times [2022-12-14 16:02:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:57,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698424254] [2022-12-14 16:02:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:02:57,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698424254] [2022-12-14 16:02:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698424254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087255068] [2022-12-14 16:02:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:57,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:57,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:02:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:02:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 16:02:57,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:57,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087255068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:57,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:57,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:02:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514533067] [2022-12-14 16:02:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:57,732 INFO L87 Difference]: Start difference. First operand 84849 states and 126159 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:03:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:00,680 INFO L93 Difference]: Finished difference Result 127669 states and 191953 transitions. [2022-12-14 16:03:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 16:03:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:00,877 INFO L225 Difference]: With dead ends: 127669 [2022-12-14 16:03:00,877 INFO L226 Difference]: Without dead ends: 85107 [2022-12-14 16:03:00,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:00,966 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 172 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6595 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:00,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6595 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:03:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85107 states. [2022-12-14 16:03:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85107 to 84209. [2022-12-14 16:03:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84209 states, 72683 states have (on average 1.4926048732165706) internal successors, (108487), 72941 states have internal predecessors, (108487), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 16:03:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84209 states to 84209 states and 124111 transitions. [2022-12-14 16:03:03,717 INFO L78 Accepts]: Start accepts. Automaton has 84209 states and 124111 transitions. Word has length 167 [2022-12-14 16:03:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:03,717 INFO L495 AbstractCegarLoop]: Abstraction has 84209 states and 124111 transitions. [2022-12-14 16:03:03,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:03:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 84209 states and 124111 transitions. [2022-12-14 16:03:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 16:03:03,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:03,843 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:03,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 16:03:04,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 16:03:04,045 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash 704400319, now seen corresponding path program 1 times [2022-12-14 16:03:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:04,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152817841] [2022-12-14 16:03:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:04,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:03:04,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:04,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152817841] [2022-12-14 16:03:04,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152817841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:04,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941141326] [2022-12-14 16:03:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:04,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:04,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:04,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:04,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 16:03:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:03:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:03:04,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:04,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941141326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:04,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:04,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:03:04,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753212947] [2022-12-14 16:03:04,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:04,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:03:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:03:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:04,475 INFO L87 Difference]: Start difference. First operand 84209 states and 124111 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:07,274 INFO L93 Difference]: Finished difference Result 144493 states and 209034 transitions. [2022-12-14 16:03:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:07,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 16:03:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:07,511 INFO L225 Difference]: With dead ends: 144493 [2022-12-14 16:03:07,511 INFO L226 Difference]: Without dead ends: 102891 [2022-12-14 16:03:07,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:07,606 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3451 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:07,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3305 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:03:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-12-14 16:03:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-12-14 16:03:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 89833 states have (on average 1.4384580276735721) internal successors, (129221), 90091 states have internal predecessors, (129221), 8322 states have call successors, (8322), 4734 states have call predecessors, (8322), 4734 states have return successors, (8322), 8066 states have call predecessors, (8322), 8322 states have call successors, (8322) [2022-12-14 16:03:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 145865 transitions. [2022-12-14 16:03:11,296 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 145865 transitions. Word has length 167 [2022-12-14 16:03:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:11,296 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 145865 transitions. [2022-12-14 16:03:11,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 145865 transitions. [2022-12-14 16:03:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 16:03:11,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:11,441 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:11,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 16:03:11,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:11,643 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1820940216, now seen corresponding path program 1 times [2022-12-14 16:03:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:11,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074169355] [2022-12-14 16:03:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:03:11,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:11,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074169355] [2022-12-14 16:03:11,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074169355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:11,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915841003] [2022-12-14 16:03:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:11,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:11,837 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 16:03:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 16:03:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 16:03:12,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:12,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915841003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:12,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:12,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 16:03:12,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031579959] [2022-12-14 16:03:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:12,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:03:12,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:03:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:03:12,049 INFO L87 Difference]: Start difference. First operand 102891 states and 145865 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 16:03:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:18,291 INFO L93 Difference]: Finished difference Result 309085 states and 435513 transitions. [2022-12-14 16:03:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:03:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 168 [2022-12-14 16:03:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:18,878 INFO L225 Difference]: With dead ends: 309085 [2022-12-14 16:03:18,878 INFO L226 Difference]: Without dead ends: 207841 [2022-12-14 16:03:19,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:03:19,014 INFO L413 NwaCegarLoop]: 3427 mSDtfsCounter, 3477 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 6985 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:19,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 6985 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:03:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207841 states. [2022-12-14 16:03:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207841 to 207583. [2022-12-14 16:03:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207583 states, 181477 states have (on average 1.4215851044484975) internal successors, (257985), 182247 states have internal predecessors, (257985), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9722 states have return successors, (17150), 15870 states have call predecessors, (17150), 16382 states have call successors, (17150) [2022-12-14 16:03:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207583 states to 207583 states and 291517 transitions. [2022-12-14 16:03:26,093 INFO L78 Accepts]: Start accepts. Automaton has 207583 states and 291517 transitions. Word has length 168 [2022-12-14 16:03:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:26,094 INFO L495 AbstractCegarLoop]: Abstraction has 207583 states and 291517 transitions. [2022-12-14 16:03:26,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 16:03:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 207583 states and 291517 transitions. [2022-12-14 16:03:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 16:03:26,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:26,418 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:26,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 16:03:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:26,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1099517563, now seen corresponding path program 1 times [2022-12-14 16:03:26,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:26,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452721158] [2022-12-14 16:03:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:03:26,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452721158] [2022-12-14 16:03:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452721158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480850763] [2022-12-14 16:03:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:26,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:26,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:03:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:03:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 16:03:27,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:27,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480850763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:27,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:27,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:03:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637968692] [2022-12-14 16:03:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:03:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:03:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:27,040 INFO L87 Difference]: Start difference. First operand 207583 states and 291517 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:36,467 INFO L93 Difference]: Finished difference Result 491081 states and 701088 transitions. [2022-12-14 16:03:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 16:03:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:37,274 INFO L225 Difference]: With dead ends: 491081 [2022-12-14 16:03:37,274 INFO L226 Difference]: Without dead ends: 285145 [2022-12-14 16:03:37,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:37,546 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 93 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:37,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6486 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:03:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285145 states. [2022-12-14 16:03:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285145 to 236267. [2022-12-14 16:03:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236267 states, 208619 states have (on average 1.4526337486039143) internal successors, (303047), 209391 states have internal predecessors, (303047), 17153 states have call successors, (17153), 10237 states have call predecessors, (17153), 10493 states have return successors, (17921), 16639 states have call predecessors, (17921), 17153 states have call successors, (17921) [2022-12-14 16:03:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236267 states to 236267 states and 338121 transitions. [2022-12-14 16:03:46,875 INFO L78 Accepts]: Start accepts. Automaton has 236267 states and 338121 transitions. Word has length 168 [2022-12-14 16:03:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:46,875 INFO L495 AbstractCegarLoop]: Abstraction has 236267 states and 338121 transitions. [2022-12-14 16:03:46,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 236267 states and 338121 transitions. [2022-12-14 16:03:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 16:03:47,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:47,225 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, 3, 3, 3, 3, 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] [2022-12-14 16:03:47,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:03:47,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 16:03:47,427 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1025483876, now seen corresponding path program 1 times [2022-12-14 16:03:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:47,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344272277] [2022-12-14 16:03:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 16:03:47,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344272277] [2022-12-14 16:03:47,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344272277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271643049] [2022-12-14 16:03:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:47,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:47,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 16:03:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:03:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 16:03:47,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:47,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271643049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:47,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:47,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:03:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879946994] [2022-12-14 16:03:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:03:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:03:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:03:47,837 INFO L87 Difference]: Start difference. First operand 236267 states and 338121 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:04:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:04:01,030 INFO L93 Difference]: Finished difference Result 583639 states and 833651 transitions. [2022-12-14 16:04:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:04:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2022-12-14 16:04:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:04:01,954 INFO L225 Difference]: With dead ends: 583639 [2022-12-14 16:04:01,954 INFO L226 Difference]: Without dead ends: 349019 [2022-12-14 16:04:02,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:04:02,246 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 7220 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7237 SdHoareTripleChecker+Valid, 9579 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:04:02,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7237 Valid, 9579 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:04:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349019 states. [2022-12-14 16:04:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349019 to 349017. [2022-12-14 16:04:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349017 states, 307813 states have (on average 1.4412939024667575) internal successors, (443649), 308969 states have internal predecessors, (443649), 25467 states have call successors, (25467), 15351 states have call predecessors, (25467), 15735 states have return successors, (26619), 24697 states have call predecessors, (26619), 25467 states have call successors, (26619) [2022-12-14 16:04:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349017 states to 349017 states and 495735 transitions. [2022-12-14 16:04:16,979 INFO L78 Accepts]: Start accepts. Automaton has 349017 states and 495735 transitions. Word has length 169 [2022-12-14 16:04:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:04:16,979 INFO L495 AbstractCegarLoop]: Abstraction has 349017 states and 495735 transitions. [2022-12-14 16:04:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:04:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 349017 states and 495735 transitions. [2022-12-14 16:04:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 16:04:17,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:04:17,528 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:04:17,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 16:04:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:04:17,729 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:04:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:04:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2100099674, now seen corresponding path program 1 times [2022-12-14 16:04:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:04:17,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365658583] [2022-12-14 16:04:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:04:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:04:17,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:04:17,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365658583] [2022-12-14 16:04:17,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365658583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:04:17,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152277013] [2022-12-14 16:04:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:17,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:04:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:04:17,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:04:17,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 16:04:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:04:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:04:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 16:04:18,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:04:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152277013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:04:18,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:04:18,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:04:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169371639] [2022-12-14 16:04:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:04:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:04:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:04:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:04:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:04:18,167 INFO L87 Difference]: Start difference. First operand 349017 states and 495735 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:04:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:04:41,353 INFO L93 Difference]: Finished difference Result 862081 states and 1222013 transitions. [2022-12-14 16:04:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:04:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 171 [2022-12-14 16:04:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:04:43,031 INFO L225 Difference]: With dead ends: 862081 [2022-12-14 16:04:43,032 INFO L226 Difference]: Without dead ends: 514711 [2022-12-14 16:04:43,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:04:43,509 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3836 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 9654 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:04:43,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 9654 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:04:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514711 states. [2022-12-14 16:05:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514711 to 514709. [2022-12-14 16:05:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514709 states, 453305 states have (on average 1.428629730534629) internal successors, (647605), 455037 states have internal predecessors, (647605), 37807 states have call successors, (37807), 23019 states have call predecessors, (37807), 23595 states have return successors, (39535), 36653 states have call predecessors, (39535), 37807 states have call successors, (39535) [2022-12-14 16:05:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514709 states to 514709 states and 724947 transitions. [2022-12-14 16:05:08,668 INFO L78 Accepts]: Start accepts. Automaton has 514709 states and 724947 transitions. Word has length 171 [2022-12-14 16:05:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:05:08,669 INFO L495 AbstractCegarLoop]: Abstraction has 514709 states and 724947 transitions. [2022-12-14 16:05:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:05:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 514709 states and 724947 transitions. [2022-12-14 16:05:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 16:05:09,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:05:09,661 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:05:09,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 16:05:09,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 16:05:09,864 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:05:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:05:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1358639260, now seen corresponding path program 1 times [2022-12-14 16:05:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:05:09,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627190953] [2022-12-14 16:05:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:05:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 16:05:10,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627190953] [2022-12-14 16:05:10,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627190953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:05:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950115683] [2022-12-14 16:05:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:10,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:10,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:10,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:10,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 16:05:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:05:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 16:05:10,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:05:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950115683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:05:10,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:05:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 16:05:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446797362] [2022-12-14 16:05:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:05:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:05:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:05:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:05:10,258 INFO L87 Difference]: Start difference. First operand 514709 states and 724947 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:05:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:32,261 INFO L93 Difference]: Finished difference Result 923824 states and 1295254 transitions. [2022-12-14 16:05:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:05:32,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2022-12-14 16:05:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:33,497 INFO L225 Difference]: With dead ends: 923824 [2022-12-14 16:05:33,497 INFO L226 Difference]: Without dead ends: 410762 [2022-12-14 16:05:34,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:05:34,097 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3814 mSDsluCounter, 6461 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:34,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 9703 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:05:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410762 states. [2022-12-14 16:05:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410762 to 394398. [2022-12-14 16:05:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394398 states, 347465 states have (on average 1.4243707999366844) internal successors, (494919), 348908 states have internal predecessors, (494919), 28509 states have call successors, (28509), 17270 states have call predecessors, (28509), 18422 states have return successors, (29661), 28220 states have call predecessors, (29661), 28509 states have call successors, (29661) [2022-12-14 16:05:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394398 states to 394398 states and 553089 transitions. [2022-12-14 16:05:54,870 INFO L78 Accepts]: Start accepts. Automaton has 394398 states and 553089 transitions. Word has length 173 [2022-12-14 16:05:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:05:54,871 INFO L495 AbstractCegarLoop]: Abstraction has 394398 states and 553089 transitions. [2022-12-14 16:05:54,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:05:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 394398 states and 553089 transitions. [2022-12-14 16:05:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:05:55,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:05:55,693 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, 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] [2022-12-14 16:05:55,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 16:05:55,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:55,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:05:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:05:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1685111140, now seen corresponding path program 2 times [2022-12-14 16:05:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:05:55,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493798140] [2022-12-14 16:05:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:05:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 16:05:56,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493798140] [2022-12-14 16:05:56,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493798140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:05:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916813135] [2022-12-14 16:05:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:05:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:56,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:56,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 16:05:56,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:05:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:05:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:05:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:05:56,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:05:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916813135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:05:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:05:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:05:56,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583188957] [2022-12-14 16:05:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:05:56,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:05:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:05:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:05:56,216 INFO L87 Difference]: Start difference. First operand 394398 states and 553089 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:06:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:06:14,227 INFO L93 Difference]: Finished difference Result 528260 states and 742294 transitions. [2022-12-14 16:06:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:06:14,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 174 [2022-12-14 16:06:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:06:15,247 INFO L225 Difference]: With dead ends: 528260 [2022-12-14 16:06:15,247 INFO L226 Difference]: Without dead ends: 376062 [2022-12-14 16:06:15,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:06:15,492 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 52 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:06:15,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6479 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:06:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376062 states. [2022-12-14 16:06:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376062 to 352830. [2022-12-14 16:06:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352830 states, 309353 states have (on average 1.4443790750372552) internal successors, (446823), 309932 states have internal predecessors, (446823), 27357 states have call successors, (27357), 16118 states have call predecessors, (27357), 16118 states have return successors, (27357), 26780 states have call predecessors, (27357), 27357 states have call successors, (27357) [2022-12-14 16:06:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352830 states to 352830 states and 501537 transitions. [2022-12-14 16:06:36,026 INFO L78 Accepts]: Start accepts. Automaton has 352830 states and 501537 transitions. Word has length 174 [2022-12-14 16:06:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:06:36,026 INFO L495 AbstractCegarLoop]: Abstraction has 352830 states and 501537 transitions. [2022-12-14 16:06:36,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:06:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 352830 states and 501537 transitions. [2022-12-14 16:06:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:06:36,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:06:36,646 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, 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] [2022-12-14 16:06:36,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 16:06:36,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:06:36,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:06:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:06:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 455598751, now seen corresponding path program 1 times [2022-12-14 16:06:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:06:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275806969] [2022-12-14 16:06:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:06:36,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:06:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:06:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:06:37,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:06:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275806969] [2022-12-14 16:06:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275806969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:06:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343296981] [2022-12-14 16:06:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:06:37,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:06:37,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:06:37,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:06:37,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 16:06:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:06:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:06:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:06:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 16:06:37,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:06:37,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343296981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:06:37,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:06:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:06:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132780053] [2022-12-14 16:06:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:06:37,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:06:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:06:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:06:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:06:37,433 INFO L87 Difference]: Start difference. First operand 352830 states and 501537 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:07:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:07,337 INFO L93 Difference]: Finished difference Result 870278 states and 1234119 transitions. [2022-12-14 16:07:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:07:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 16:07:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:09,027 INFO L225 Difference]: With dead ends: 870278 [2022-12-14 16:07:09,028 INFO L226 Difference]: Without dead ends: 519152 [2022-12-14 16:07:09,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:07:09,521 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 7201 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7218 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:09,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7218 Valid, 9571 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519152 states. [2022-12-14 16:07:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519152 to 519150. [2022-12-14 16:07:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519150 states, 454393 states have (on average 1.4295092574049335) internal successors, (649559), 455260 states have internal predecessors, (649559), 40589 states have call successors, (40589), 24166 states have call predecessors, (40589), 24166 states have return successors, (40589), 39724 states have call predecessors, (40589), 40589 states have call successors, (40589) [2022-12-14 16:07:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519150 states to 519150 states and 730737 transitions. [2022-12-14 16:07:40,268 INFO L78 Accepts]: Start accepts. Automaton has 519150 states and 730737 transitions. Word has length 174 [2022-12-14 16:07:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:40,268 INFO L495 AbstractCegarLoop]: Abstraction has 519150 states and 730737 transitions. [2022-12-14 16:07:40,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:07:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 519150 states and 730737 transitions. [2022-12-14 16:07:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 16:07:41,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:41,318 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, 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] [2022-12-14 16:07:41,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 16:07:41,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:41,520 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash 749712460, now seen corresponding path program 1 times [2022-12-14 16:07:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:41,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083159867] [2022-12-14 16:07:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 16:07:41,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083159867] [2022-12-14 16:07:41,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083159867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810064263] [2022-12-14 16:07:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:41,783 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:41,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 16:07:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 16:07:41,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810064263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:41,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:41,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:07:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422670709] [2022-12-14 16:07:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:41,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:07:41,966 INFO L87 Difference]: Start difference. First operand 519150 states and 730737 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:08:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:16,890 INFO L93 Difference]: Finished difference Result 1006530 states and 1427043 transitions. [2022-12-14 16:08:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:08:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 172 [2022-12-14 16:08:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:18,913 INFO L225 Difference]: With dead ends: 1006530 [2022-12-14 16:08:18,913 INFO L226 Difference]: Without dead ends: 661744 [2022-12-14 16:08:19,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:08:19,617 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 130 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 6596 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:19,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 6596 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:08:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661744 states. [2022-12-14 16:08:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661744 to 603390. [2022-12-14 16:08:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603390 states, 533449 states have (on average 1.4533179366724842) internal successors, (775271), 534316 states have internal predecessors, (775271), 43181 states have call successors, (43181), 26758 states have call predecessors, (43181), 26758 states have return successors, (43181), 42316 states have call predecessors, (43181), 43181 states have call successors, (43181) [2022-12-14 16:08:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603390 states to 603390 states and 861633 transitions. [2022-12-14 16:08:54,342 INFO L78 Accepts]: Start accepts. Automaton has 603390 states and 861633 transitions. Word has length 172 [2022-12-14 16:08:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:54,342 INFO L495 AbstractCegarLoop]: Abstraction has 603390 states and 861633 transitions. [2022-12-14 16:08:54,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:08:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 603390 states and 861633 transitions. [2022-12-14 16:08:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:08:55,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:55,328 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, 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] [2022-12-14 16:08:55,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 16:08:55,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 16:08:55,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1005595763, now seen corresponding path program 1 times [2022-12-14 16:08:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67819955] [2022-12-14 16:08:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:08:55,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67819955] [2022-12-14 16:08:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67819955] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033090836] [2022-12-14 16:08:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:55,862 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:55,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_754811eb-3500-4c9a-ad3e-1a488e8fdee2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 16:08:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:08:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 16:08:56,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:08:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033090836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:08:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:08:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:08:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659682903] [2022-12-14 16:08:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:08:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:08:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:08:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:08:56,046 INFO L87 Difference]: Start difference. First operand 603390 states and 861633 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:09:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:45,020 INFO L93 Difference]: Finished difference Result 1440566 states and 2049303 transitions. [2022-12-14 16:09:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:09:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 16:09:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:47,748 INFO L225 Difference]: With dead ends: 1440566 [2022-12-14 16:09:47,749 INFO L226 Difference]: Without dead ends: 838880