./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.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_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/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_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/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_521ccb66-0687-4249-a478-7ec6c9b4288a/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 2dda75b6d46698b5258f612b82d0e93d324481eaa047be7e62672a619c582b4e --- 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 15:07:28,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:07:28,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:07:28,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:07:28,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:07:28,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:07:28,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:07:28,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:07:28,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:07:28,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:07:28,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:07:28,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:07:28,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:07:28,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:07:28,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:07:28,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:07:28,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:07:28,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:07:28,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:07:28,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:07:28,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:07:28,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:07:28,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:07:28,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:07:28,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:07:28,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:07:28,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:07:28,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:07:28,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:07:28,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:07:28,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:07:28,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:07:28,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:07:28,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:07:28,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:07:28,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:07:28,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:07:28,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:07:28,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:07:28,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:07:28,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:07:28,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:07:28,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:07:28,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:07:28,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:07:28,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:07:28,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:07:28,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:07:28,726 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:07:28,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:07:28,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:07:28,728 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:07:28,728 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:07:28,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:07:28,728 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:07:28,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:07:28,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:07:28,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:07:28,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:07:28,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:07:28,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:07:28,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:07:28,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:07:28,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:07:28,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:07:28,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:07:28,731 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:07:28,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:07:28,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:07:28,732 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:07:28,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:07:28,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:07:28,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:07:28,732 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_521ccb66-0687-4249-a478-7ec6c9b4288a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dda75b6d46698b5258f612b82d0e93d324481eaa047be7e62672a619c582b4e [2022-12-14 15:07:28,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:07:28,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:07:28,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:07:28,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:07:28,940 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:07:28,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c [2022-12-14 15:07:31,514 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:07:31,918 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:07:31,918 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c [2022-12-14 15:07:31,952 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/data/fb227b9ba/40e911b54f124599bae944dc5a8f1403/FLAG07d62fb30 [2022-12-14 15:07:32,088 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/data/fb227b9ba/40e911b54f124599bae944dc5a8f1403 [2022-12-14 15:07:32,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:07:32,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:07:32,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:07:32,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:07:32,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:07:32,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:32" (1/1) ... [2022-12-14 15:07:32,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d30caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:32, skipping insertion in model container [2022-12-14 15:07:32,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:07:32" (1/1) ... [2022-12-14 15:07:32,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:07:32,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:07:33,567 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_521ccb66-0687-4249-a478-7ec6c9b4288a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c[382357,382370] [2022-12-14 15:07:33,586 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_521ccb66-0687-4249-a478-7ec6c9b4288a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c[383339,383352] [2022-12-14 15:07:33,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:07:33,763 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:07:34,563 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_521ccb66-0687-4249-a478-7ec6c9b4288a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c[382357,382370] [2022-12-14 15:07:34,565 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_521ccb66-0687-4249-a478-7ec6c9b4288a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.06.cil-2.c[383339,383352] [2022-12-14 15:07:34,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:07:34,608 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:07:34,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34 WrapperNode [2022-12-14 15:07:34,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:07:34,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:07:34,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:07:34,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:07:34,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:34,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:34,945 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2022-12-14 15:07:34,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:07:34,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:07:34,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:07:34,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:07:34,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:34,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:34,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:34,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:07:35,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:07:35,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:07:35,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:07:35,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (1/1) ... [2022-12-14 15:07:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:07:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:35,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:07:35,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 15:07:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 15:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:07:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 15:07:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 15:07:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 15:07:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 15:07:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 15:07:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 15:07:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 15:07:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 15:07:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:07:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:07:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:07:35,421 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:07:35,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:07:40,750 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:07:42,141 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:07:42,142 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 15:07:42,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:42 BoogieIcfgContainer [2022-12-14 15:07:42,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:07:42,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:07:42,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:07:42,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:07:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:07:32" (1/3) ... [2022-12-14 15:07:42,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239bd063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:42, skipping insertion in model container [2022-12-14 15:07:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:07:34" (2/3) ... [2022-12-14 15:07:42,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239bd063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:07:42, skipping insertion in model container [2022-12-14 15:07:42,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:07:42" (3/3) ... [2022-12-14 15:07:42,152 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.06.cil-2.c [2022-12-14 15:07:42,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:07:42,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:07:42,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:07:42,235 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;@94e04e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:07:42,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:07:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 15:07:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 15:07:42,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:42,253 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] [2022-12-14 15:07:42,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1456066980, now seen corresponding path program 1 times [2022-12-14 15:07:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095002989] [2022-12-14 15:07:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:42,522 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 15:07:42,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095002989] [2022-12-14 15:07:42,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095002989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:42,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:42,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:07:42,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333754691] [2022-12-14 15:07:42,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:07:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:07:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:07:42,555 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 15:07:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:43,247 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2022-12-14 15:07:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:07:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2022-12-14 15:07:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:43,267 INFO L225 Difference]: With dead ends: 3635 [2022-12-14 15:07:43,268 INFO L226 Difference]: Without dead ends: 1869 [2022-12-14 15:07:43,275 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 15:07:43,278 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:43,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:07:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-12-14 15:07:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2022-12-14 15:07:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 15:07:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2022-12-14 15:07:43,393 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2022-12-14 15:07:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:43,394 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2022-12-14 15:07:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 15:07:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2022-12-14 15:07:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:07:43,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:43,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:07:43,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 660354979, now seen corresponding path program 1 times [2022-12-14 15:07:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:43,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903477984] [2022-12-14 15:07:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:07:43,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903477984] [2022-12-14 15:07:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903477984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229416430] [2022-12-14 15:07:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:43,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:43,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:43,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:07:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:07:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:07:43,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229416430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:43,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:43,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:07:43,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119873772] [2022-12-14 15:07:43,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:43,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:43,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:43,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:07:43,822 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 15:07:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:44,178 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2022-12-14 15:07:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 94 [2022-12-14 15:07:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:44,186 INFO L225 Difference]: With dead ends: 2305 [2022-12-14 15:07:44,186 INFO L226 Difference]: Without dead ends: 2083 [2022-12-14 15:07:44,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 15:07:44,189 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:44,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-12-14 15:07:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2022-12-14 15:07:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 15:07:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2022-12-14 15:07:44,233 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2022-12-14 15:07:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:44,234 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2022-12-14 15:07:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 15:07:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2022-12-14 15:07:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:07:44,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:44,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:44,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:07:44,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:44,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1526493315, now seen corresponding path program 1 times [2022-12-14 15:07:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14233948] [2022-12-14 15:07:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:07:44,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14233948] [2022-12-14 15:07:44,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14233948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396316030] [2022-12-14 15:07:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:44,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:44,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:07:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:07:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:07:44,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:44,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396316030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:44,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:44,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:07:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122984109] [2022-12-14 15:07:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:44,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:44,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:44,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:07:44,680 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 15:07:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:45,025 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2022-12-14 15:07:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:45,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 94 [2022-12-14 15:07:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:45,032 INFO L225 Difference]: With dead ends: 2932 [2022-12-14 15:07:45,032 INFO L226 Difference]: Without dead ends: 2499 [2022-12-14 15:07:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 15:07:45,035 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3420 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-12-14 15:07:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2022-12-14 15:07:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-14 15:07:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2022-12-14 15:07:45,092 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2022-12-14 15:07:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:45,092 INFO L495 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2022-12-14 15:07:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 15:07:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2022-12-14 15:07:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:07:45,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:45,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:45,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:07:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:45,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash 207500195, now seen corresponding path program 1 times [2022-12-14 15:07:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417819050] [2022-12-14 15:07:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:45,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:07:45,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417819050] [2022-12-14 15:07:45,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417819050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850611078] [2022-12-14 15:07:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:45,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:45,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:07:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:07:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:07:45,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:45,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850611078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:45,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:45,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:07:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733231347] [2022-12-14 15:07:45,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:45,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:07:45,639 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 15:07:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:46,024 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2022-12-14 15:07:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 94 [2022-12-14 15:07:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:46,034 INFO L225 Difference]: With dead ends: 4162 [2022-12-14 15:07:46,034 INFO L226 Difference]: Without dead ends: 3315 [2022-12-14 15:07:46,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 15:07:46,038 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3417 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:46,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3374 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-12-14 15:07:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2022-12-14 15:07:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-12-14 15:07:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2022-12-14 15:07:46,113 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2022-12-14 15:07:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:46,114 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2022-12-14 15:07:46,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 15:07:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2022-12-14 15:07:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:07:46,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:46,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:46,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:07:46,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:46,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1368898429, now seen corresponding path program 1 times [2022-12-14 15:07:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:46,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902930808] [2022-12-14 15:07:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:07:46,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902930808] [2022-12-14 15:07:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902930808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:46,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:46,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365537473] [2022-12-14 15:07:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:46,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:46,472 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 15:07:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:46,943 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2022-12-14 15:07:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 94 [2022-12-14 15:07:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:46,960 INFO L225 Difference]: With dead ends: 4595 [2022-12-14 15:07:46,960 INFO L226 Difference]: Without dead ends: 3745 [2022-12-14 15:07:46,963 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 15:07:46,964 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:46,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-12-14 15:07:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2022-12-14 15:07:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-12-14 15:07:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2022-12-14 15:07:47,094 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2022-12-14 15:07:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:47,094 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2022-12-14 15:07:47,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 15:07:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2022-12-14 15:07:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 15:07:47,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:47,100 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, 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] [2022-12-14 15:07:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:07:47,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1796784644, now seen corresponding path program 1 times [2022-12-14 15:07:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:47,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374362336] [2022-12-14 15:07:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 15:07:47,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374362336] [2022-12-14 15:07:47,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374362336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:47,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:47,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086741122] [2022-12-14 15:07:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:47,166 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:47,504 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2022-12-14 15:07:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:47,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 126 [2022-12-14 15:07:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:47,519 INFO L225 Difference]: With dead ends: 7402 [2022-12-14 15:07:47,519 INFO L226 Difference]: Without dead ends: 5459 [2022-12-14 15:07:47,524 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 15:07:47,525 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:47,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:07:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-12-14 15:07:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2022-12-14 15:07:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-12-14 15:07:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2022-12-14 15:07:47,653 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2022-12-14 15:07:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:47,653 INFO L495 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2022-12-14 15:07:47,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2022-12-14 15:07:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 15:07:47,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:47,660 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, 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] [2022-12-14 15:07:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:07:47,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1277354200, now seen corresponding path program 1 times [2022-12-14 15:07:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583915318] [2022-12-14 15:07:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 15:07:47,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583915318] [2022-12-14 15:07:47,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583915318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:47,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:47,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084001006] [2022-12-14 15:07:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:47,712 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:48,312 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2022-12-14 15:07:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 126 [2022-12-14 15:07:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:48,353 INFO L225 Difference]: With dead ends: 12862 [2022-12-14 15:07:48,353 INFO L226 Difference]: Without dead ends: 9075 [2022-12-14 15:07:48,368 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 15:07:48,369 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:48,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2022-12-14 15:07:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2022-12-14 15:07:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-12-14 15:07:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2022-12-14 15:07:48,632 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2022-12-14 15:07:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:48,632 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2022-12-14 15:07:48,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2022-12-14 15:07:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 15:07:48,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:48,645 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, 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] [2022-12-14 15:07:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:07:48,645 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash -471300435, now seen corresponding path program 1 times [2022-12-14 15:07:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892536202] [2022-12-14 15:07:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 15:07:48,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892536202] [2022-12-14 15:07:48,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892536202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:48,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:07:48,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:07:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138499800] [2022-12-14 15:07:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:07:48,696 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:49,403 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2022-12-14 15:07:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 126 [2022-12-14 15:07:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:49,440 INFO L225 Difference]: With dead ends: 23494 [2022-12-14 15:07:49,440 INFO L226 Difference]: Without dead ends: 16115 [2022-12-14 15:07:49,457 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 15:07:49,457 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:49,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2022-12-14 15:07:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2022-12-14 15:07:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-12-14 15:07:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2022-12-14 15:07:49,889 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2022-12-14 15:07:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:49,889 INFO L495 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2022-12-14 15:07:49,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:07:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2022-12-14 15:07:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 15:07:49,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:49,917 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, 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 15:07:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:07:49,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash 391644466, now seen corresponding path program 1 times [2022-12-14 15:07:49,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:49,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28558355] [2022-12-14 15:07:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:49,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:07:50,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28558355] [2022-12-14 15:07:50,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28558355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293844674] [2022-12-14 15:07:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:50,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:50,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:50,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:50,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:07:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:07:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:07:50,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:50,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293844674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:50,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:50,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:07:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801088378] [2022-12-14 15:07:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:07:50,168 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 15:07:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:51,010 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2022-12-14 15:07:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 145 [2022-12-14 15:07:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:51,056 INFO L225 Difference]: With dead ends: 29013 [2022-12-14 15:07:51,056 INFO L226 Difference]: Without dead ends: 21635 [2022-12-14 15:07:51,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:07:51,071 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:51,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2022-12-14 15:07:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2022-12-14 15:07:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 15:07:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2022-12-14 15:07:51,726 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2022-12-14 15:07:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:51,726 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2022-12-14 15:07:51,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 15:07:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2022-12-14 15:07:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 15:07:51,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:51,763 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, 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 15:07:51,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:07:51,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:51,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 676994086, now seen corresponding path program 2 times [2022-12-14 15:07:51,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:51,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274238305] [2022-12-14 15:07:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:07:52,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:52,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274238305] [2022-12-14 15:07:52,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274238305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:52,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678071560] [2022-12-14 15:07:52,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:07:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:52,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:52,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:52,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:07:52,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:07:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:07:52,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:07:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 15:07:52,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:52,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678071560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:52,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:07:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292461300] [2022-12-14 15:07:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:52,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:07:52,367 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 15:07:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:53,179 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2022-12-14 15:07:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 145 [2022-12-14 15:07:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:53,212 INFO L225 Difference]: With dead ends: 29253 [2022-12-14 15:07:53,212 INFO L226 Difference]: Without dead ends: 18979 [2022-12-14 15:07:53,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 15:07:53,227 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:53,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2022-12-14 15:07:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2022-12-14 15:07:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 15:07:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2022-12-14 15:07:53,728 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2022-12-14 15:07:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:53,729 INFO L495 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2022-12-14 15:07:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 15:07:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2022-12-14 15:07:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 15:07:53,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:53,752 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, 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 15:07:53,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:07:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:07:53,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1157307688, now seen corresponding path program 1 times [2022-12-14 15:07:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772087810] [2022-12-14 15:07:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:07:54,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:54,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772087810] [2022-12-14 15:07:54,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772087810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835877400] [2022-12-14 15:07:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:54,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:54,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:07:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:07:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 15:07:54,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:54,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835877400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:54,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:54,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:07:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425836956] [2022-12-14 15:07:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:07:54,325 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 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, (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 15:07:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:55,056 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2022-12-14 15:07:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:55,056 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, (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 145 [2022-12-14 15:07:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:55,092 INFO L225 Difference]: With dead ends: 27757 [2022-12-14 15:07:55,092 INFO L226 Difference]: Without dead ends: 18915 [2022-12-14 15:07:55,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 15:07:55,111 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:55,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2022-12-14 15:07:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2022-12-14 15:07:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 15:07:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2022-12-14 15:07:55,671 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2022-12-14 15:07:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:55,671 INFO L495 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2022-12-14 15:07:55,671 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, (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 15:07:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2022-12-14 15:07:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 15:07:55,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:55,695 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, 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 15:07:55,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:07:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:07:55,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2026129434, now seen corresponding path program 1 times [2022-12-14 15:07:55,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135469242] [2022-12-14 15:07:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:07:56,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:56,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135469242] [2022-12-14 15:07:56,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135469242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:56,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496524813] [2022-12-14 15:07:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:56,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:56,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:07:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:07:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:07:56,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:56,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496524813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:56,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:56,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:07:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701910063] [2022-12-14 15:07:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:56,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:07:56,251 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 15:07:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:57,196 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2022-12-14 15:07:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 145 [2022-12-14 15:07:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:57,247 INFO L225 Difference]: With dead ends: 31061 [2022-12-14 15:07:57,247 INFO L226 Difference]: Without dead ends: 22459 [2022-12-14 15:07:57,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 15:07:57,266 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:57,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:07:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2022-12-14 15:07:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2022-12-14 15:07:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2022-12-14 15:07:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2022-12-14 15:07:58,028 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2022-12-14 15:07:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:58,029 INFO L495 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2022-12-14 15:07:58,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 15:07:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2022-12-14 15:07:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:07:58,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:58,055 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, 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 15:07:58,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:07:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:07:58,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 848199459, now seen corresponding path program 1 times [2022-12-14 15:07:58,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:58,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715929781] [2022-12-14 15:07:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:07:58,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715929781] [2022-12-14 15:07:58,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715929781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317675249] [2022-12-14 15:07:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:58,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:07:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:07:58,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:07:58,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:58,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317675249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:58,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:58,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:07:58,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307339774] [2022-12-14 15:07:58,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:58,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:07:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:07:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:07:58,635 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 15:08:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:00,208 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2022-12-14 15:08:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:08:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 146 [2022-12-14 15:08:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:00,289 INFO L225 Difference]: With dead ends: 64557 [2022-12-14 15:08:00,289 INFO L226 Difference]: Without dead ends: 43745 [2022-12-14 15:08:00,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 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 15:08:00,318 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:00,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:08:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2022-12-14 15:08:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2022-12-14 15:08:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2022-12-14 15:08:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2022-12-14 15:08:01,911 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2022-12-14 15:08:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:01,911 INFO L495 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2022-12-14 15:08:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 15:08:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2022-12-14 15:08:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:08:01,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:01,962 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, 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 15:08:01,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:08:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:08:02,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1912960398, now seen corresponding path program 1 times [2022-12-14 15:08:02,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416960480] [2022-12-14 15:08:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:08:02,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:02,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416960480] [2022-12-14 15:08:02,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416960480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:02,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046801410] [2022-12-14 15:08:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:02,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:02,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:08:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:08:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:08:02,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:02,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046801410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:02,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:02,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:08:02,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146109426] [2022-12-14 15:08:02,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:02,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:02,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:02,534 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 15:08:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:04,550 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2022-12-14 15:08:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 146 [2022-12-14 15:08:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:04,678 INFO L225 Difference]: With dead ends: 101577 [2022-12-14 15:08:04,678 INFO L226 Difference]: Without dead ends: 59545 [2022-12-14 15:08:04,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 15:08:04,731 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:04,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:08:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2022-12-14 15:08:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2022-12-14 15:08:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-12-14 15:08:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2022-12-14 15:08:06,856 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2022-12-14 15:08:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:06,856 INFO L495 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2022-12-14 15:08:06,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 15:08:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2022-12-14 15:08:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:08:06,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:06,917 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, 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 15:08:06,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:07,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:08:07,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash -252571097, now seen corresponding path program 1 times [2022-12-14 15:08:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019180743] [2022-12-14 15:08:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:08:07,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:07,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019180743] [2022-12-14 15:08:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019180743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:07,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855730667] [2022-12-14 15:08:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:07,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:07,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:08:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:08:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:08:07,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:07,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855730667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:07,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:07,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:08:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082616296] [2022-12-14 15:08:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:08:07,480 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 15:08:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:10,766 INFO L93 Difference]: Finished difference Result 119447 states and 167171 transitions. [2022-12-14 15:08:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:08:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 147 [2022-12-14 15:08:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:10,917 INFO L225 Difference]: With dead ends: 119447 [2022-12-14 15:08:10,917 INFO L226 Difference]: Without dead ends: 71867 [2022-12-14 15:08:10,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 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 15:08:10,963 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 7035 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7050 SdHoareTripleChecker+Valid, 9504 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:10,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7050 Valid, 9504 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:08:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71867 states. [2022-12-14 15:08:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71867 to 71865. [2022-12-14 15:08:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71865 states, 61957 states have (on average 1.4190648352889907) internal successors, (87921), 62249 states have internal predecessors, (87921), 5979 states have call successors, (5979), 3831 states have call predecessors, (5979), 3927 states have return successors, (6267), 5785 states have call predecessors, (6267), 5979 states have call successors, (6267) [2022-12-14 15:08:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71865 states to 71865 states and 100167 transitions. [2022-12-14 15:08:14,428 INFO L78 Accepts]: Start accepts. Automaton has 71865 states and 100167 transitions. Word has length 147 [2022-12-14 15:08:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:14,428 INFO L495 AbstractCegarLoop]: Abstraction has 71865 states and 100167 transitions. [2022-12-14 15:08:14,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 15:08:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 71865 states and 100167 transitions. [2022-12-14 15:08:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 15:08:14,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:14,523 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, 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 15:08:14,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:14,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:08:14,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 205423691, now seen corresponding path program 1 times [2022-12-14 15:08:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002265060] [2022-12-14 15:08:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:14,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:08:14,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002265060] [2022-12-14 15:08:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002265060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316481974] [2022-12-14 15:08:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:14,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:14,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:14,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:08:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:08:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 15:08:15,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316481974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:15,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:15,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:08:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977441976] [2022-12-14 15:08:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:08:15,196 INFO L87 Difference]: Start difference. First operand 71865 states and 100167 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 15:08:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:19,788 INFO L93 Difference]: Finished difference Result 175177 states and 242381 transitions. [2022-12-14 15:08:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:08:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 149 [2022-12-14 15:08:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:20,038 INFO L225 Difference]: With dead ends: 175177 [2022-12-14 15:08:20,038 INFO L226 Difference]: Without dead ends: 104959 [2022-12-14 15:08:20,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 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 15:08:20,125 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 3691 mSDsluCounter, 6367 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3706 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:20,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3706 Valid, 9571 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:08:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104959 states. [2022-12-14 15:08:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104959 to 104957. [2022-12-14 15:08:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104957 states, 90209 states have (on average 1.3987628728840804) internal successors, (126181), 90645 states have internal predecessors, (126181), 8863 states have call successors, (8863), 5739 states have call predecessors, (8863), 5883 states have return successors, (9295), 8573 states have call predecessors, (9295), 8863 states have call successors, (9295) [2022-12-14 15:08:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104957 states to 104957 states and 144339 transitions. [2022-12-14 15:08:25,062 INFO L78 Accepts]: Start accepts. Automaton has 104957 states and 144339 transitions. Word has length 149 [2022-12-14 15:08:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 104957 states and 144339 transitions. [2022-12-14 15:08:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 15:08:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 104957 states and 144339 transitions. [2022-12-14 15:08:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 15:08:25,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:25,204 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, 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 15:08:25,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:25,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:08:25,405 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1365690746, now seen corresponding path program 1 times [2022-12-14 15:08:25,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:25,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860032114] [2022-12-14 15:08:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:25,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 15:08:25,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:25,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860032114] [2022-12-14 15:08:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860032114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:25,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7050863] [2022-12-14 15:08:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:25,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:08:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:08:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:08:25,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7050863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:25,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:25,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:08:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970708759] [2022-12-14 15:08:25,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:25,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:08:25,629 INFO L87 Difference]: Start difference. First operand 104957 states and 144339 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 15:08:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:31,384 INFO L93 Difference]: Finished difference Result 201185 states and 278425 transitions. [2022-12-14 15:08:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 148 [2022-12-14 15:08:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:31,681 INFO L225 Difference]: With dead ends: 201185 [2022-12-14 15:08:31,681 INFO L226 Difference]: Without dead ends: 132275 [2022-12-14 15:08:31,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:08:31,776 INFO L413 NwaCegarLoop]: 3295 mSDtfsCounter, 101 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6501 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:31,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6501 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:08:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132275 states. [2022-12-14 15:08:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132275 to 119261. [2022-12-14 15:08:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119261 states, 103361 states have (on average 1.4204680682268942) internal successors, (146821), 103797 states have internal predecessors, (146821), 9439 states have call successors, (9439), 6315 states have call predecessors, (9439), 6459 states have return successors, (9871), 9149 states have call predecessors, (9871), 9439 states have call successors, (9871) [2022-12-14 15:08:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119261 states to 119261 states and 166131 transitions. [2022-12-14 15:08:37,116 INFO L78 Accepts]: Start accepts. Automaton has 119261 states and 166131 transitions. Word has length 148 [2022-12-14 15:08:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:37,116 INFO L495 AbstractCegarLoop]: Abstraction has 119261 states and 166131 transitions. [2022-12-14 15:08:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 15:08:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 119261 states and 166131 transitions. [2022-12-14 15:08:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 15:08:37,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:37,263 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, 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 15:08:37,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:08:37,464 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1930886398, now seen corresponding path program 1 times [2022-12-14 15:08:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:37,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488305181] [2022-12-14 15:08:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:08:37,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488305181] [2022-12-14 15:08:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488305181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690085135] [2022-12-14 15:08:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:37,626 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:08:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:08:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 15:08:37,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:37,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690085135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:37,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:37,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:08:37,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750330250] [2022-12-14 15:08:37,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:37,824 INFO L87 Difference]: Start difference. First operand 119261 states and 166131 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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 15:08:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:43,325 INFO L93 Difference]: Finished difference Result 212500 states and 294130 transitions. [2022-12-14 15:08:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:08:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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 149 [2022-12-14 15:08:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:43,555 INFO L225 Difference]: With dead ends: 212500 [2022-12-14 15:08:43,555 INFO L226 Difference]: Without dead ends: 94886 [2022-12-14 15:08:43,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 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 15:08:43,698 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 7066 mSDsluCounter, 6313 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7081 SdHoareTripleChecker+Valid, 9524 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:43,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7081 Valid, 9524 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:08:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94886 states. [2022-12-14 15:08:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94886 to 91776. [2022-12-14 15:08:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91776 states, 79619 states have (on average 1.4177646039261986) internal successors, (112881), 79982 states have internal predecessors, (112881), 7125 states have call successors, (7125), 4742 states have call predecessors, (7125), 5030 states have return successors, (7413), 7052 states have call predecessors, (7413), 7125 states have call successors, (7413) [2022-12-14 15:08:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91776 states to 91776 states and 127419 transitions. [2022-12-14 15:08:48,176 INFO L78 Accepts]: Start accepts. Automaton has 91776 states and 127419 transitions. Word has length 149 [2022-12-14 15:08:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:48,176 INFO L495 AbstractCegarLoop]: Abstraction has 91776 states and 127419 transitions. [2022-12-14 15:08:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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 15:08:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 91776 states and 127419 transitions. [2022-12-14 15:08:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:08:48,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:48,284 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, 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 15:08:48,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:08:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:08:48,485 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash -713736048, now seen corresponding path program 2 times [2022-12-14 15:08:48,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:48,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253296934] [2022-12-14 15:08:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 15:08:48,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253296934] [2022-12-14 15:08:48,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253296934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912601584] [2022-12-14 15:08:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:08:48,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:48,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:48,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:08:48,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:08:48,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:08:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:08:48,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:08:48,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:48,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912601584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:48,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:48,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:08:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170833797] [2022-12-14 15:08:48,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:48,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:48,773 INFO L87 Difference]: Start difference. First operand 91776 states and 127419 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 15:08:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:53,006 INFO L93 Difference]: Finished difference Result 122258 states and 169936 transitions. [2022-12-14 15:08:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:53,007 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 150 [2022-12-14 15:08:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:53,173 INFO L225 Difference]: With dead ends: 122258 [2022-12-14 15:08:53,173 INFO L226 Difference]: Without dead ends: 88200 [2022-12-14 15:08:53,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 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 15:08:53,219 INFO L413 NwaCegarLoop]: 3219 mSDtfsCounter, 40 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:53,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:08:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88200 states. [2022-12-14 15:08:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88200 to 83400. [2022-12-14 15:08:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83400 states, 72107 states have (on average 1.4346596030898526) internal successors, (103449), 72254 states have internal predecessors, (103449), 6837 states have call successors, (6837), 4454 states have call predecessors, (6837), 4454 states have return successors, (6837), 6692 states have call predecessors, (6837), 6837 states have call successors, (6837) [2022-12-14 15:08:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83400 states to 83400 states and 117123 transitions. [2022-12-14 15:08:57,349 INFO L78 Accepts]: Start accepts. Automaton has 83400 states and 117123 transitions. Word has length 150 [2022-12-14 15:08:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:57,349 INFO L495 AbstractCegarLoop]: Abstraction has 83400 states and 117123 transitions. [2022-12-14 15:08:57,349 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 15:08:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 83400 states and 117123 transitions. [2022-12-14 15:08:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:08:57,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:57,458 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, 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 15:08:57,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 15:08:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:57,659 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -457380353, now seen corresponding path program 1 times [2022-12-14 15:08:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623857207] [2022-12-14 15:08:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:08:57,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623857207] [2022-12-14 15:08:57,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623857207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979850664] [2022-12-14 15:08:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:57,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:57,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:57,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:57,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:08:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:08:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 15:08:57,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:57,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979850664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:57,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:57,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:08:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358298430] [2022-12-14 15:08:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:57,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:57,985 INFO L87 Difference]: Start difference. First operand 83400 states and 117123 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 15:09:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:04,730 INFO L93 Difference]: Finished difference Result 202868 states and 282813 transitions. [2022-12-14 15:09:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:09:04,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 150 [2022-12-14 15:09:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:04,984 INFO L225 Difference]: With dead ends: 202868 [2022-12-14 15:09:04,985 INFO L226 Difference]: Without dead ends: 121166 [2022-12-14 15:09:05,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 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 15:09:05,065 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 7079 mSDsluCounter, 6308 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7094 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:05,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7094 Valid, 9505 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:09:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121166 states. [2022-12-14 15:09:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121166 to 121164. [2022-12-14 15:09:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121164 states, 104359 states have (on average 1.4088770494159584) internal successors, (147029), 104578 states have internal predecessors, (147029), 10133 states have call successors, (10133), 6670 states have call predecessors, (10133), 6670 states have return successors, (10133), 9916 states have call predecessors, (10133), 10133 states have call successors, (10133) [2022-12-14 15:09:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121164 states to 121164 states and 167295 transitions. [2022-12-14 15:09:11,635 INFO L78 Accepts]: Start accepts. Automaton has 121164 states and 167295 transitions. Word has length 150 [2022-12-14 15:09:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:11,635 INFO L495 AbstractCegarLoop]: Abstraction has 121164 states and 167295 transitions. [2022-12-14 15:09:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 15:09:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 121164 states and 167295 transitions. [2022-12-14 15:09:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 15:09:11,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:11,797 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, 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 15:09:11,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:09:11,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:11,998 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 145457855, now seen corresponding path program 1 times [2022-12-14 15:09:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:12,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206555100] [2022-12-14 15:09:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:09:12,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206555100] [2022-12-14 15:09:12,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206555100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581416820] [2022-12-14 15:09:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:12,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:12,162 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:12,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:09:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:09:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 15:09:12,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:12,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581416820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:12,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:12,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:09:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023824148] [2022-12-14 15:09:12,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:12,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:09:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:09:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:09:12,350 INFO L87 Difference]: Start difference. First operand 121164 states and 167295 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 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 15:09:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:22,868 INFO L93 Difference]: Finished difference Result 287660 states and 394737 transitions. [2022-12-14 15:09:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:09:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 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 152 [2022-12-14 15:09:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:23,246 INFO L225 Difference]: With dead ends: 287660 [2022-12-14 15:09:23,246 INFO L226 Difference]: Without dead ends: 168194 [2022-12-14 15:09:23,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 151 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 15:09:23,380 INFO L413 NwaCegarLoop]: 3202 mSDtfsCounter, 3685 mSDsluCounter, 6360 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 9562 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:23,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 9562 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:09:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168194 states. [2022-12-14 15:09:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168194 to 168192. [2022-12-14 15:09:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168192 states, 144053 states have (on average 1.387551803849972) internal successors, (199881), 144380 states have internal predecessors, (199881), 14583 states have call successors, (14583), 9554 states have call predecessors, (14583), 9554 states have return successors, (14583), 14258 states have call predecessors, (14583), 14583 states have call successors, (14583) [2022-12-14 15:09:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168192 states to 168192 states and 229047 transitions. [2022-12-14 15:09:33,627 INFO L78 Accepts]: Start accepts. Automaton has 168192 states and 229047 transitions. Word has length 152 [2022-12-14 15:09:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:33,628 INFO L495 AbstractCegarLoop]: Abstraction has 168192 states and 229047 transitions. [2022-12-14 15:09:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 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 15:09:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 168192 states and 229047 transitions. [2022-12-14 15:09:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 15:09:33,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:33,848 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, 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 15:09:33,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:09:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 15:09:34,050 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2121529988, now seen corresponding path program 1 times [2022-12-14 15:09:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136147040] [2022-12-14 15:09:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:09:34,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136147040] [2022-12-14 15:09:34,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136147040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639950100] [2022-12-14 15:09:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:34,212 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:34,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:09:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:09:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 15:09:34,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:34,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639950100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:34,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:09:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811077348] [2022-12-14 15:09:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:09:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:09:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:09:34,371 INFO L87 Difference]: Start difference. First operand 168192 states and 229047 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 15:09:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:09:50,676 INFO L93 Difference]: Finished difference Result 411707 states and 557637 transitions. [2022-12-14 15:09:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:09:50,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 154 [2022-12-14 15:09:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:09:51,327 INFO L225 Difference]: With dead ends: 411707 [2022-12-14 15:09:51,328 INFO L226 Difference]: Without dead ends: 245213 [2022-12-14 15:09:51,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 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 15:09:51,535 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3721 mSDsluCounter, 6367 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3736 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:09:51,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3736 Valid, 9564 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:09:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245213 states. [2022-12-14 15:10:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245213 to 245211. [2022-12-14 15:10:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245211 states, 209320 states have (on average 1.3628941333842919) internal successors, (285281), 209809 states have internal predecessors, (285281), 21593 states have call successors, (21593), 14296 states have call predecessors, (21593), 14296 states have return successors, (21593), 21106 states have call predecessors, (21593), 21593 states have call successors, (21593) [2022-12-14 15:10:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245211 states to 245211 states and 328467 transitions. [2022-12-14 15:10:08,484 INFO L78 Accepts]: Start accepts. Automaton has 245211 states and 328467 transitions. Word has length 154 [2022-12-14 15:10:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:10:08,484 INFO L495 AbstractCegarLoop]: Abstraction has 245211 states and 328467 transitions. [2022-12-14 15:10:08,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 15:10:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 245211 states and 328467 transitions. [2022-12-14 15:10:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:10:08,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:10:08,909 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, 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 15:10:08,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 15:10:09,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:10:09,110 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:10:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:10:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1102891288, now seen corresponding path program 1 times [2022-12-14 15:10:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:10:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17379037] [2022-12-14 15:10:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:10:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 49 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 15:10:09,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:10:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17379037] [2022-12-14 15:10:09,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17379037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:10:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832230677] [2022-12-14 15:10:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:09,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:10:09,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:10:09,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 15:10:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:10:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:10:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:10:09,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:10:09,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832230677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:10:09,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:10:09,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 15:10:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79522680] [2022-12-14 15:10:09,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:10:09,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:10:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:10:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:10:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:10:09,398 INFO L87 Difference]: Start difference. First operand 245211 states and 328467 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 15:10:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:10:28,569 INFO L93 Difference]: Finished difference Result 459917 states and 618184 transitions. [2022-12-14 15:10:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:10:28,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 156 [2022-12-14 15:10:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:10:29,293 INFO L225 Difference]: With dead ends: 459917 [2022-12-14 15:10:29,294 INFO L226 Difference]: Without dead ends: 287955 [2022-12-14 15:10:29,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 15:10:29,525 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3382 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:10:29,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 3268 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:10:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287955 states. [2022-12-14 15:10:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287955 to 285623. [2022-12-14 15:10:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285623 states, 247429 states have (on average 1.338755764279854) internal successors, (331247), 247918 states have internal predecessors, (331247), 22015 states have call successors, (22015), 16177 states have call predecessors, (22015), 16177 states have return successors, (23603), 21528 states have call predecessors, (23603), 22015 states have call successors, (23603) [2022-12-14 15:10:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285623 states to 285623 states and 376865 transitions. [2022-12-14 15:10:50,126 INFO L78 Accepts]: Start accepts. Automaton has 285623 states and 376865 transitions. Word has length 156 [2022-12-14 15:10:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:10:50,127 INFO L495 AbstractCegarLoop]: Abstraction has 285623 states and 376865 transitions. [2022-12-14 15:10:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 15:10:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 285623 states and 376865 transitions. [2022-12-14 15:10:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 15:10:50,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:10:50,625 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, 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] [2022-12-14 15:10:50,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 15:10:50,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:50,826 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:10:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:10:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1711344150, now seen corresponding path program 1 times [2022-12-14 15:10:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:10:50,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88117251] [2022-12-14 15:10:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:10:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 56 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:10:51,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:10:51,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88117251] [2022-12-14 15:10:51,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88117251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:10:51,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640709745] [2022-12-14 15:10:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:10:51,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:10:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:10:51,006 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:10:51,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:10:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:10:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:10:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:10:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:10:51,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:10:51,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640709745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:10:51,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:10:51,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 15:10:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545841155] [2022-12-14 15:10:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:10:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:10:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:10:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:10:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:10:51,169 INFO L87 Difference]: Start difference. First operand 285623 states and 376865 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:11:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:16,998 INFO L93 Difference]: Finished difference Result 566249 states and 749009 transitions. [2022-12-14 15:11:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:11:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 158 [2022-12-14 15:11:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:18,075 INFO L225 Difference]: With dead ends: 566249 [2022-12-14 15:11:18,075 INFO L226 Difference]: Without dead ends: 367329 [2022-12-14 15:11:18,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:11:18,340 INFO L413 NwaCegarLoop]: 3307 mSDtfsCounter, 290 mSDsluCounter, 9480 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 12787 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:18,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 12787 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:11:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367329 states. [2022-12-14 15:11:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367329 to 347661. [2022-12-14 15:11:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347661 states, 300069 states have (on average 1.3255784502897667) internal successors, (397765), 300234 states have internal predecessors, (397765), 27913 states have call successors, (27913), 20293 states have call predecessors, (27913), 19677 states have return successors, (30311), 27134 states have call predecessors, (30311), 27913 states have call successors, (30311) [2022-12-14 15:11:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347661 states to 347661 states and 455989 transitions. [2022-12-14 15:11:44,690 INFO L78 Accepts]: Start accepts. Automaton has 347661 states and 455989 transitions. Word has length 158 [2022-12-14 15:11:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:44,690 INFO L495 AbstractCegarLoop]: Abstraction has 347661 states and 455989 transitions. [2022-12-14 15:11:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:11:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 347661 states and 455989 transitions. [2022-12-14 15:11:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 15:11:45,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:45,214 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, 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] [2022-12-14 15:11:45,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 15:11:45,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:45,415 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:45,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1118375075, now seen corresponding path program 1 times [2022-12-14 15:11:45,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:45,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040450936] [2022-12-14 15:11:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:11:45,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040450936] [2022-12-14 15:11:45,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040450936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557834855] [2022-12-14 15:11:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:45,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:45,491 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:45,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:11:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:11:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:11:45,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:11:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557834855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:11:45,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:11:45,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 15:11:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600842729] [2022-12-14 15:11:45,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:11:45,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:11:45,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:11:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:11:45,653 INFO L87 Difference]: Start difference. First operand 347661 states and 455989 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 15:12:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:12:16,239 INFO L93 Difference]: Finished difference Result 662967 states and 878109 transitions. [2022-12-14 15:12:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:12:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 154 [2022-12-14 15:12:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:12:17,647 INFO L225 Difference]: With dead ends: 662967 [2022-12-14 15:12:17,647 INFO L226 Difference]: Without dead ends: 430625 [2022-12-14 15:12:17,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:12:17,995 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 92 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:12:17,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:12:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430625 states. [2022-12-14 15:12:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430625 to 385461. [2022-12-14 15:12:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385461 states, 334413 states have (on average 1.338970075924082) internal successors, (447769), 334578 states have internal predecessors, (447769), 29641 states have call successors, (29641), 22021 states have call predecessors, (29641), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 15:12:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385461 states to 385461 states and 509449 transitions. [2022-12-14 15:12:47,368 INFO L78 Accepts]: Start accepts. Automaton has 385461 states and 509449 transitions. Word has length 154 [2022-12-14 15:12:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:12:47,368 INFO L495 AbstractCegarLoop]: Abstraction has 385461 states and 509449 transitions. [2022-12-14 15:12:47,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 15:12:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 385461 states and 509449 transitions. [2022-12-14 15:12:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:12:47,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:12:47,731 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, 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] [2022-12-14 15:12:47,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 15:12:47,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:47,932 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:12:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:12:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1489124211, now seen corresponding path program 1 times [2022-12-14 15:12:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:12:47,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573185761] [2022-12-14 15:12:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:47,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:12:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 42 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 15:12:48,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:12:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573185761] [2022-12-14 15:12:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573185761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:12:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318422665] [2022-12-14 15:12:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:48,009 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:12:48,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 15:12:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:48,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:12:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:12:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:12:48,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:12:48,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318422665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:12:48,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:12:48,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 15:12:48,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312185432] [2022-12-14 15:12:48,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:12:48,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:12:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:12:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:12:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:12:48,147 INFO L87 Difference]: Start difference. First operand 385461 states and 509449 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 15:13:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:16,402 INFO L93 Difference]: Finished difference Result 656415 states and 881189 transitions. [2022-12-14 15:13:16,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:13:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 156 [2022-12-14 15:13:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:17,569 INFO L225 Difference]: With dead ends: 656415 [2022-12-14 15:13:17,569 INFO L226 Difference]: Without dead ends: 386111 [2022-12-14 15:13:17,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 157 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 15:13:17,935 INFO L413 NwaCegarLoop]: 3314 mSDtfsCounter, 132 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6504 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:17,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6504 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:13:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386111 states. [2022-12-14 15:13:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386111 to 383301. [2022-12-14 15:13:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383301 states, 332253 states have (on average 1.3203703202077934) internal successors, (438697), 332418 states have internal predecessors, (438697), 29641 states have call successors, (29641), 22021 states have call predecessors, (29641), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 15:13:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383301 states to 383301 states and 500377 transitions. [2022-12-14 15:13:46,926 INFO L78 Accepts]: Start accepts. Automaton has 383301 states and 500377 transitions. Word has length 156 [2022-12-14 15:13:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:46,926 INFO L495 AbstractCegarLoop]: Abstraction has 383301 states and 500377 transitions. [2022-12-14 15:13:46,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 15:13:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 383301 states and 500377 transitions. [2022-12-14 15:13:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:13:47,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:47,278 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, 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 15:13:47,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 15:13:47,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 15:13:47,479 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2031683957, now seen corresponding path program 1 times [2022-12-14 15:13:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817699928] [2022-12-14 15:13:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 53 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 15:13:47,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:47,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817699928] [2022-12-14 15:13:47,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817699928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:47,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406363570] [2022-12-14 15:13:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:47,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:47,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:47,614 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:47,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 15:13:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:13:47,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:13:47,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:13:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406363570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:47,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:13:47,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 15:13:47,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574916976] [2022-12-14 15:13:47,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:47,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:13:47,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:13:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:13:47,767 INFO L87 Difference]: Start difference. First operand 383301 states and 500377 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, (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 15:14:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:20,968 INFO L93 Difference]: Finished difference Result 699411 states and 918734 transitions. [2022-12-14 15:14:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:14:20,969 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, (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 156 [2022-12-14 15:14:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:22,117 INFO L225 Difference]: With dead ends: 699411 [2022-12-14 15:14:22,117 INFO L226 Difference]: Without dead ends: 432347 [2022-12-14 15:14:22,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 15:14:22,611 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3387 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3268 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 15:14:22,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3268 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:14:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432347 states. [2022-12-14 15:14:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432347 to 425847. [2022-12-14 15:14:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425847 states, 371985 states have (on average 1.304297216285603) internal successors, (485179), 372636 states have internal predecessors, (485179), 30145 states have call successors, (30145), 23821 states have call predecessors, (30145), 23715 states have return successors, (34423), 29390 states have call predecessors, (34423), 30145 states have call successors, (34423) [2022-12-14 15:14:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425847 states to 425847 states and 549747 transitions. [2022-12-14 15:14:57,019 INFO L78 Accepts]: Start accepts. Automaton has 425847 states and 549747 transitions. Word has length 156 [2022-12-14 15:14:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:57,019 INFO L495 AbstractCegarLoop]: Abstraction has 425847 states and 549747 transitions. [2022-12-14 15:14:57,020 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, (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 15:14:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 425847 states and 549747 transitions. [2022-12-14 15:14:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 15:14:57,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:57,401 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:14:57,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 15:14:57,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:57,602 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1048015237, now seen corresponding path program 1 times [2022-12-14 15:14:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:57,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113510672] [2022-12-14 15:14:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 15:14:57,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113510672] [2022-12-14 15:14:57,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113510672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943336382] [2022-12-14 15:14:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:57,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:57,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:57,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_521ccb66-0687-4249-a478-7ec6c9b4288a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 15:14:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:14:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 80 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:14:58,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 15:14:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943336382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318374565] [2022-12-14 15:14:59,605 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 15:14:59,605 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:59,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:59,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:59,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:17:34,499 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 251 for LOIs