./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/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_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/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_21f294a6-b686-4916-8dc6-b18c94c48ef9/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 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a --- 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 09:23:09,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:23:09,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:23:09,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:23:09,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:23:09,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:23:09,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:23:09,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:23:09,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:23:09,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:23:09,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:23:09,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:23:09,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:23:09,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:23:09,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:23:09,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:23:09,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:23:09,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:23:09,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:23:09,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:23:09,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:23:09,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:23:09,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:23:09,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:23:09,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:23:09,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:23:09,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:23:09,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:23:09,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:23:09,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:23:09,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:23:09,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:23:09,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:23:09,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:23:09,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:23:09,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:23:09,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:23:09,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:23:09,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:23:09,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:23:09,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:23:09,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:23:09,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:23:09,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:23:09,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:23:09,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:23:09,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:23:09,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:23:09,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:23:09,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:23:09,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:23:09,729 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:23:09,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:23:09,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:23:09,729 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:23:09,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:23:09,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:23:09,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:23:09,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:23:09,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:23:09,732 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_21f294a6-b686-4916-8dc6-b18c94c48ef9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a [2022-12-14 09:23:09,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:23:09,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:23:09,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:23:09,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:23:09,935 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:23:09,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2022-12-14 09:23:12,557 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:23:13,001 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:23:13,001 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2022-12-14 09:23:13,042 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/data/78bef1a85/82e33cf4191c4e10bda9367b8fa6847f/FLAG33d49d486 [2022-12-14 09:23:13,053 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/data/78bef1a85/82e33cf4191c4e10bda9367b8fa6847f [2022-12-14 09:23:13,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:23:13,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:23:13,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:23:13,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:23:13,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:23:13,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:23:13" (1/1) ... [2022-12-14 09:23:13,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd6e955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:13, skipping insertion in model container [2022-12-14 09:23:13,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:23:13" (1/1) ... [2022-12-14 09:23:13,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:23:13,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:23:14,511 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_21f294a6-b686-4916-8dc6-b18c94c48ef9/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2022-12-14 09:23:14,535 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_21f294a6-b686-4916-8dc6-b18c94c48ef9/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2022-12-14 09:23:14,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:23:14,717 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:23:15,515 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_21f294a6-b686-4916-8dc6-b18c94c48ef9/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2022-12-14 09:23:15,522 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_21f294a6-b686-4916-8dc6-b18c94c48ef9/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2022-12-14 09:23:15,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:23:15,577 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:23:15,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15 WrapperNode [2022-12-14 09:23:15,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:23:15,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:23:15,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:23:15,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:23:15,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:15,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:15,867 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-12-14 09:23:15,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:23:15,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:23:15,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:23:15,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:23:15,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:15,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:15,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:15,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,125 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:23:16,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:23:16,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:23:16,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:23:16,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (1/1) ... [2022-12-14 09:23:16,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:23:16,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:16,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:23:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:23:16,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:23:16,257 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:23:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:23:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:23:16,349 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:23:16,350 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:23:21,789 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:23:23,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:23:23,067 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 09:23:23,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:23:23 BoogieIcfgContainer [2022-12-14 09:23:23,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:23:23,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:23:23,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:23:23,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:23:23,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:23:13" (1/3) ... [2022-12-14 09:23:23,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d105de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:23:23, skipping insertion in model container [2022-12-14 09:23:23,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:23:15" (2/3) ... [2022-12-14 09:23:23,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d105de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:23:23, skipping insertion in model container [2022-12-14 09:23:23,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:23:23" (3/3) ... [2022-12-14 09:23:23,077 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.07.cil-1.c [2022-12-14 09:23:23,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:23:23,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:23:23,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:23:23,159 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;@312dd2a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:23:23,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 09:23:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 09:23:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 09:23:23,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:23,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:23:23,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:23,182 INFO L85 PathProgramCache]: Analyzing trace with hash -517920360, now seen corresponding path program 1 times [2022-12-14 09:23:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:23,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328386157] [2022-12-14 09:23:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:23,468 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 09:23:23,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:23,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328386157] [2022-12-14 09:23:23,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328386157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:23,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:23,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:23:23,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84632437] [2022-12-14 09:23:23,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:23:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:23:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:23:23,501 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 09:23:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:24,184 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-12-14 09:23:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:23:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 52 [2022-12-14 09:23:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:24,204 INFO L225 Difference]: With dead ends: 3668 [2022-12-14 09:23:24,205 INFO L226 Difference]: Without dead ends: 1891 [2022-12-14 09:23:24,212 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 09:23:24,215 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:24,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:23:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-12-14 09:23:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-12-14 09:23:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 09:23:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-12-14 09:23:24,328 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-12-14 09:23:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:24,328 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-12-14 09:23:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 09:23:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-12-14 09:23:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 09:23:24,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:24,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:24,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:23:24,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash 782733272, now seen corresponding path program 1 times [2022-12-14 09:23:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298239040] [2022-12-14 09:23:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:23:24,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:24,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298239040] [2022-12-14 09:23:24,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298239040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:24,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562417745] [2022-12-14 09:23:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:24,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:24,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:24,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:24,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:23:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:23:24,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:24,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562417745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:24,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:24,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:23:24,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528921369] [2022-12-14 09:23:24,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:23:24,680 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 09:23:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:25,043 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-12-14 09:23:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:25,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 101 [2022-12-14 09:23:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:25,052 INFO L225 Difference]: With dead ends: 2371 [2022-12-14 09:23:25,052 INFO L226 Difference]: Without dead ends: 2127 [2022-12-14 09:23:25,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 09:23:25,055 INFO L413 NwaCegarLoop]: 3258 mSDtfsCounter, 3435 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:25,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-12-14 09:23:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-12-14 09:23:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 09:23:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-12-14 09:23:25,101 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-12-14 09:23:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:25,101 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-12-14 09:23:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 09:23:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-12-14 09:23:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 09:23:25,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:25,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:25,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:25,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:25,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1285798810, now seen corresponding path program 1 times [2022-12-14 09:23:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:25,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427226097] [2022-12-14 09:23:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:23:25,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427226097] [2022-12-14 09:23:25,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427226097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162296373] [2022-12-14 09:23:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:25,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:23:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:23:25,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162296373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:25,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:25,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:23:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037260225] [2022-12-14 09:23:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:23:25,633 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 09:23:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:26,009 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-12-14 09:23:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 101 [2022-12-14 09:23:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:26,017 INFO L225 Difference]: With dead ends: 3064 [2022-12-14 09:23:26,017 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 09:23:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 09:23:26,019 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 3438 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3407 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:26,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3438 Valid, 3407 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 09:23:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-12-14 09:23:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-12-14 09:23:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-12-14 09:23:26,076 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-12-14 09:23:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-12-14 09:23:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 09:23:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-12-14 09:23:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 09:23:26,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:26,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:26,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:23:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:26,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1324621672, now seen corresponding path program 1 times [2022-12-14 09:23:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665308492] [2022-12-14 09:23:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:23:26,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665308492] [2022-12-14 09:23:26,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665308492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513508571] [2022-12-14 09:23:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:26,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:26,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:26,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:26,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:23:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 09:23:26,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:26,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513508571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:26,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:26,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:23:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337405579] [2022-12-14 09:23:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:23:26,533 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 09:23:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:26,894 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-12-14 09:23:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 101 [2022-12-14 09:23:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:26,905 INFO L225 Difference]: With dead ends: 4426 [2022-12-14 09:23:26,905 INFO L226 Difference]: Without dead ends: 3491 [2022-12-14 09:23:26,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 09:23:26,909 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:26,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-12-14 09:23:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-12-14 09:23:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 09:23:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-12-14 09:23:26,991 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-12-14 09:23:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:26,992 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-12-14 09:23:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 09:23:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-12-14 09:23:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 09:23:26,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:26,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:27,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:23:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:27,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1534887386, now seen corresponding path program 1 times [2022-12-14 09:23:27,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162295215] [2022-12-14 09:23:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:23:27,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162295215] [2022-12-14 09:23:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162295215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605061732] [2022-12-14 09:23:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:27,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:27,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:23:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:23:27,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:27,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605061732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:27,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:27,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:23:27,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46250216] [2022-12-14 09:23:27,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:27,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:23:27,470 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 09:23:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:27,879 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-12-14 09:23:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 101 [2022-12-14 09:23:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:27,903 INFO L225 Difference]: With dead ends: 7102 [2022-12-14 09:23:27,903 INFO L226 Difference]: Without dead ends: 5267 [2022-12-14 09:23:27,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 09:23:27,911 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-12-14 09:23:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-12-14 09:23:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-12-14 09:23:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-12-14 09:23:28,052 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-12-14 09:23:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:28,052 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-12-14 09:23:28,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 09:23:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-12-14 09:23:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 09:23:28,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:28,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:28,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:23:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:28,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 999998620, now seen corresponding path program 1 times [2022-12-14 09:23:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:28,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490705204] [2022-12-14 09:23:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 09:23:28,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490705204] [2022-12-14 09:23:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490705204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:28,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:28,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:23:28,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093941218] [2022-12-14 09:23:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:23:28,321 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 09:23:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:28,756 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-12-14 09:23:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:28,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 101 [2022-12-14 09:23:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:28,775 INFO L225 Difference]: With dead ends: 8051 [2022-12-14 09:23:28,775 INFO L226 Difference]: Without dead ends: 6209 [2022-12-14 09:23:28,779 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 09:23:28,780 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:28,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-12-14 09:23:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-12-14 09:23:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 09:23:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-12-14 09:23:28,923 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-12-14 09:23:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:28,923 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-12-14 09:23:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 09:23:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-12-14 09:23:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 09:23:28,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:28,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:28,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:23:28,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:28,932 INFO L85 PathProgramCache]: Analyzing trace with hash 885683169, now seen corresponding path program 1 times [2022-12-14 09:23:28,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879268373] [2022-12-14 09:23:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 09:23:28,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:28,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879268373] [2022-12-14 09:23:28,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879268373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:28,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:28,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:23:28,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420369786] [2022-12-14 09:23:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:28,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:23:28,989 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:29,530 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-12-14 09:23:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 136 [2022-12-14 09:23:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:29,558 INFO L225 Difference]: With dead ends: 14230 [2022-12-14 09:23:29,558 INFO L226 Difference]: Without dead ends: 9987 [2022-12-14 09:23:29,568 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 09:23:29,569 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:29,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-12-14 09:23:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-12-14 09:23:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 09:23:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-12-14 09:23:29,853 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-12-14 09:23:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:29,853 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-12-14 09:23:29,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-12-14 09:23:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 09:23:29,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:29,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:23:29,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1009420519, now seen corresponding path program 1 times [2022-12-14 09:23:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940717671] [2022-12-14 09:23:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 09:23:29,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940717671] [2022-12-14 09:23:29,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940717671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:29,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:29,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:23:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278161443] [2022-12-14 09:23:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:29,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:23:29,920 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:30,676 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-12-14 09:23:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 136 [2022-12-14 09:23:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:30,715 INFO L225 Difference]: With dead ends: 26230 [2022-12-14 09:23:30,715 INFO L226 Difference]: Without dead ends: 17939 [2022-12-14 09:23:30,731 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 09:23:30,732 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:30,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-12-14 09:23:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-12-14 09:23:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-12-14 09:23:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-12-14 09:23:31,177 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-12-14 09:23:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:31,177 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-12-14 09:23:31,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-12-14 09:23:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 09:23:31,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:31,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:23:31,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash -249671803, now seen corresponding path program 1 times [2022-12-14 09:23:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:31,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863726740] [2022-12-14 09:23:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:31,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 09:23:31,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863726740] [2022-12-14 09:23:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863726740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:31,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:31,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:23:31,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827554578] [2022-12-14 09:23:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:23:31,256 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:32,487 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-12-14 09:23:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 136 [2022-12-14 09:23:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:32,561 INFO L225 Difference]: With dead ends: 49654 [2022-12-14 09:23:32,562 INFO L226 Difference]: Without dead ends: 33459 [2022-12-14 09:23:32,595 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 09:23:32,596 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:32,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:23:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-12-14 09:23:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-12-14 09:23:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 09:23:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-12-14 09:23:33,453 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-12-14 09:23:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:33,453 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-12-14 09:23:33,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 09:23:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-12-14 09:23:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:23:33,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:33,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:23:33,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:23:33,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1885557133, now seen corresponding path program 1 times [2022-12-14 09:23:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:33,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082684589] [2022-12-14 09:23:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:33,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 09:23:33,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082684589] [2022-12-14 09:23:33,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082684589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:33,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:23:33,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:23:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578023457] [2022-12-14 09:23:33,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:33,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:23:33,562 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:23:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:35,353 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-12-14 09:23:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 09:23:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:35,479 INFO L225 Difference]: With dead ends: 84725 [2022-12-14 09:23:35,479 INFO L226 Difference]: Without dead ends: 53107 [2022-12-14 09:23:35,523 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 09:23:35,523 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:35,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-12-14 09:23:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-12-14 09:23:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2022-12-14 09:23:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-12-14 09:23:37,021 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-12-14 09:23:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:37,021 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-12-14 09:23:37,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:23:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-12-14 09:23:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:23:37,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:37,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:23:37,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:23:37,086 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1791293149, now seen corresponding path program 2 times [2022-12-14 09:23:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559293317] [2022-12-14 09:23:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 09:23:37,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:37,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559293317] [2022-12-14 09:23:37,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559293317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:37,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387339355] [2022-12-14 09:23:37,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:23:37,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:37,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:37,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:37,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:23:37,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:23:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 09:23:37,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:37,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387339355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:37,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:37,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 09:23:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476418854] [2022-12-14 09:23:37,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:37,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:23:37,372 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 09:23:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:39,619 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-12-14 09:23:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 09:23:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:39,752 INFO L225 Difference]: With dead ends: 87933 [2022-12-14 09:23:39,753 INFO L226 Difference]: Without dead ends: 65083 [2022-12-14 09:23:39,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 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 09:23:39,790 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:39,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6558 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-12-14 09:23:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-12-14 09:23:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-12-14 09:23:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-12-14 09:23:41,494 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-12-14 09:23:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-12-14 09:23:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 09:23:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-12-14 09:23:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:23:41,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:41,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:23:41,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:23:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:23:41,768 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1189956720, now seen corresponding path program 3 times [2022-12-14 09:23:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:41,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650886813] [2022-12-14 09:23:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:41,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 09:23:42,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650886813] [2022-12-14 09:23:42,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650886813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080347761] [2022-12-14 09:23:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:23:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:42,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:42,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:42,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:23:42,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:23:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:23:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 09:23:42,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:42,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080347761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:42,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:42,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:23:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097030221] [2022-12-14 09:23:42,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:23:42,234 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 09:23:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:44,355 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-12-14 09:23:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 156 [2022-12-14 09:23:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:44,492 INFO L225 Difference]: With dead ends: 88477 [2022-12-14 09:23:44,492 INFO L226 Difference]: Without dead ends: 59259 [2022-12-14 09:23:44,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:23:44,550 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6559 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:44,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:23:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-12-14 09:23:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-12-14 09:23:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-12-14 09:23:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-12-14 09:23:46,695 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-12-14 09:23:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:46,695 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-12-14 09:23:46,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 09:23:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-12-14 09:23:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:23:46,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:46,767 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, 1, 1] [2022-12-14 09:23:46,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:23:46,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 09:23:46,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 666636049, now seen corresponding path program 1 times [2022-12-14 09:23:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575750325] [2022-12-14 09:23:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:23:47,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575750325] [2022-12-14 09:23:47,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575750325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27032168] [2022-12-14 09:23:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:47,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:47,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:23:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:23:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 09:23:47,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:47,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27032168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:47,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:47,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:23:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306051987] [2022-12-14 09:23:47,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:47,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:23:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:47,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:23:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:23:47,325 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 09:23:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:49,209 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2022-12-14 09:23:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:23:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 156 [2022-12-14 09:23:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:49,332 INFO L225 Difference]: With dead ends: 95989 [2022-12-14 09:23:49,332 INFO L226 Difference]: Without dead ends: 67251 [2022-12-14 09:23:49,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:23:49,377 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3432 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:49,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3283 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:23:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states. [2022-12-14 09:23:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67251 to 67251. [2022-12-14 09:23:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67251 states, 59693 states have (on average 1.519390883353157) internal successors, (90697), 59824 states have internal predecessors, (90697), 4612 states have call successors, (4612), 2944 states have call predecessors, (4612), 2944 states have return successors, (4612), 4483 states have call predecessors, (4612), 4612 states have call successors, (4612) [2022-12-14 09:23:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67251 states to 67251 states and 99921 transitions. [2022-12-14 09:23:51,367 INFO L78 Accepts]: Start accepts. Automaton has 67251 states and 99921 transitions. Word has length 156 [2022-12-14 09:23:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:51,368 INFO L495 AbstractCegarLoop]: Abstraction has 67251 states and 99921 transitions. [2022-12-14 09:23:51,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 09:23:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 67251 states and 99921 transitions. [2022-12-14 09:23:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:23:51,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:51,444 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, 1, 1] [2022-12-14 09:23:51,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:23:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:51,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:23:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2024771026, now seen corresponding path program 1 times [2022-12-14 09:23:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:23:51,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579595946] [2022-12-14 09:23:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:23:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 09:23:51,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:23:51,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579595946] [2022-12-14 09:23:51,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579595946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:23:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308815534] [2022-12-14 09:23:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:51,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:51,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:51,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:23:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:23:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:23:52,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:23:52,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308815534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:23:52,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:23:52,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 09:23:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687906379] [2022-12-14 09:23:52,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:23:52,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:23:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:23:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:23:52,036 INFO L87 Difference]: Start difference. First operand 67251 states and 99921 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 09:23:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:56,398 INFO L93 Difference]: Finished difference Result 199673 states and 294097 transitions. [2022-12-14 09:23:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:23:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 156 [2022-12-14 09:23:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:56,709 INFO L225 Difference]: With dead ends: 199673 [2022-12-14 09:23:56,710 INFO L226 Difference]: Without dead ends: 134069 [2022-12-14 09:23:56,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 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 09:23:56,790 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3460 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3460 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:56,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3460 Valid, 6895 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:23:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2022-12-14 09:24:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133547. [2022-12-14 09:24:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133547 states, 118315 states have (on average 1.487072645057685) internal successors, (175943), 118831 states have internal predecessors, (175943), 9089 states have call successors, (9089), 5885 states have call predecessors, (9089), 6141 states have return successors, (10749), 8831 states have call predecessors, (10749), 9089 states have call successors, (10749) [2022-12-14 09:24:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133547 states to 133547 states and 195781 transitions. [2022-12-14 09:24:01,066 INFO L78 Accepts]: Start accepts. Automaton has 133547 states and 195781 transitions. Word has length 156 [2022-12-14 09:24:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:01,067 INFO L495 AbstractCegarLoop]: Abstraction has 133547 states and 195781 transitions. [2022-12-14 09:24:01,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 09:24:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 133547 states and 195781 transitions. [2022-12-14 09:24:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:24:01,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:01,256 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, 1, 1] [2022-12-14 09:24:01,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 09:24:01,458 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 182457235, now seen corresponding path program 2 times [2022-12-14 09:24:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:01,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430219930] [2022-12-14 09:24:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:24:01,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430219930] [2022-12-14 09:24:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430219930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423501022] [2022-12-14 09:24:01,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:01,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:01,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:24:01,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:24:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:24:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:24:01,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423501022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:01,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:24:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:24:01,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124076038] [2022-12-14 09:24:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:24:01,794 INFO L87 Difference]: Start difference. First operand 133547 states and 195781 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:24:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:07,649 INFO L93 Difference]: Finished difference Result 265697 states and 395369 transitions. [2022-12-14 09:24:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:24:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 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 09:24:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:08,144 INFO L225 Difference]: With dead ends: 265697 [2022-12-14 09:24:08,145 INFO L226 Difference]: Without dead ends: 196581 [2022-12-14 09:24:08,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:24:08,297 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3421 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3421 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:08,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3421 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:24:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196581 states. [2022-12-14 09:24:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196581 to 195167. [2022-12-14 09:24:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195167 states, 172519 states have (on average 1.4846538642120577) internal successors, (256131), 173163 states have internal predecessors, (256131), 13565 states have call successors, (13565), 8825 states have call predecessors, (13565), 9081 states have return successors, (17397), 13179 states have call predecessors, (17397), 13565 states have call successors, (17397) [2022-12-14 09:24:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195167 states to 195167 states and 287093 transitions. [2022-12-14 09:24:15,145 INFO L78 Accepts]: Start accepts. Automaton has 195167 states and 287093 transitions. Word has length 156 [2022-12-14 09:24:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:15,145 INFO L495 AbstractCegarLoop]: Abstraction has 195167 states and 287093 transitions. [2022-12-14 09:24:15,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 09:24:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 195167 states and 287093 transitions. [2022-12-14 09:24:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:24:15,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:15,444 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, 1, 1] [2022-12-14 09:24:15,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:24:15,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:24:15,645 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1898453845, now seen corresponding path program 3 times [2022-12-14 09:24:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142991321] [2022-12-14 09:24:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:24:15,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142991321] [2022-12-14 09:24:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142991321] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902540924] [2022-12-14 09:24:15,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:24:15,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:15,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:15,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:24:15,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:24:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:24:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:24:15,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:15,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902540924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:15,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:24:15,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:24:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211506115] [2022-12-14 09:24:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:15,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:24:15,976 INFO L87 Difference]: Start difference. First operand 195167 states and 287093 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 09:24:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:23,182 INFO L93 Difference]: Finished difference Result 338123 states and 498008 transitions. [2022-12-14 09:24:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:24:23,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 09:24:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:23,774 INFO L225 Difference]: With dead ends: 338123 [2022-12-14 09:24:23,774 INFO L226 Difference]: Without dead ends: 222665 [2022-12-14 09:24:23,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:24:23,940 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 3402 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:23,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3294 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:24:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222665 states. [2022-12-14 09:24:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222665 to 221697. [2022-12-14 09:24:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221697 states, 197405 states have (on average 1.4462500949823967) internal successors, (285497), 198177 states have internal predecessors, (285497), 13939 states have call successors, (13939), 9967 states have call predecessors, (13939), 10351 states have return successors, (19267), 13553 states have call predecessors, (19267), 13939 states have call successors, (19267) [2022-12-14 09:24:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221697 states to 221697 states and 318703 transitions. [2022-12-14 09:24:32,390 INFO L78 Accepts]: Start accepts. Automaton has 221697 states and 318703 transitions. Word has length 156 [2022-12-14 09:24:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:32,390 INFO L495 AbstractCegarLoop]: Abstraction has 221697 states and 318703 transitions. [2022-12-14 09:24:32,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 09:24:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 221697 states and 318703 transitions. [2022-12-14 09:24:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 09:24:32,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:32,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:24:32,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:32,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:24:32,913 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1357536843, now seen corresponding path program 1 times [2022-12-14 09:24:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069780392] [2022-12-14 09:24:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:24:33,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069780392] [2022-12-14 09:24:33,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069780392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295500725] [2022-12-14 09:24:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:33,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:33,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:24:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:24:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:24:33,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295500725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:33,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:24:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:24:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864998254] [2022-12-14 09:24:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:24:33,271 INFO L87 Difference]: Start difference. First operand 221697 states and 318703 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 09:24:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:40,867 INFO L93 Difference]: Finished difference Result 350597 states and 513617 transitions. [2022-12-14 09:24:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:24:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 09:24:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:41,431 INFO L225 Difference]: With dead ends: 350597 [2022-12-14 09:24:41,431 INFO L226 Difference]: Without dead ends: 221635 [2022-12-14 09:24:41,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:24:41,594 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 146 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:41,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6562 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:24:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221635 states. [2022-12-14 09:24:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221635 to 219713. [2022-12-14 09:24:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219713 states, 195421 states have (on average 1.4321132324571055) internal successors, (279865), 196193 states have internal predecessors, (279865), 13939 states have call successors, (13939), 9967 states have call predecessors, (13939), 10351 states have return successors, (19267), 13553 states have call predecessors, (19267), 13939 states have call successors, (19267) [2022-12-14 09:24:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219713 states to 219713 states and 313071 transitions. [2022-12-14 09:24:50,042 INFO L78 Accepts]: Start accepts. Automaton has 219713 states and 313071 transitions. Word has length 156 [2022-12-14 09:24:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:50,043 INFO L495 AbstractCegarLoop]: Abstraction has 219713 states and 313071 transitions. [2022-12-14 09:24:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 09:24:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 219713 states and 313071 transitions. [2022-12-14 09:24:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 09:24:50,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:50,473 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, 1, 1] [2022-12-14 09:24:50,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:50,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:24:50,674 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1171991047, now seen corresponding path program 1 times [2022-12-14 09:24:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579089184] [2022-12-14 09:24:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 09:24:50,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:50,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579089184] [2022-12-14 09:24:50,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579089184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:50,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891528738] [2022-12-14 09:24:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:50,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:50,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:50,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:50,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:24:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:24:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:24:51,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:51,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891528738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:51,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:24:51,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:24:51,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627323722] [2022-12-14 09:24:51,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:51,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:51,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:51,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:24:51,117 INFO L87 Difference]: Start difference. First operand 219713 states and 313071 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 09:25:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:02,665 INFO L93 Difference]: Finished difference Result 528049 states and 766304 transitions. [2022-12-14 09:25:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:25:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 158 [2022-12-14 09:25:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:03,612 INFO L225 Difference]: With dead ends: 528049 [2022-12-14 09:25:03,612 INFO L226 Difference]: Without dead ends: 309983 [2022-12-14 09:25:03,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 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 09:25:03,878 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 85 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:03,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6456 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:25:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309983 states. [2022-12-14 09:25:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309983 to 255425. [2022-12-14 09:25:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255425 states, 228829 states have (on average 1.4604835925516433) internal successors, (334201), 229601 states have internal predecessors, (334201), 15091 states have call successors, (15091), 11119 states have call predecessors, (15091), 11503 states have return successors, (20419), 14705 states have call predecessors, (20419), 15091 states have call successors, (20419) [2022-12-14 09:25:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255425 states to 255425 states and 369711 transitions. [2022-12-14 09:25:15,006 INFO L78 Accepts]: Start accepts. Automaton has 255425 states and 369711 transitions. Word has length 158 [2022-12-14 09:25:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:15,007 INFO L495 AbstractCegarLoop]: Abstraction has 255425 states and 369711 transitions. [2022-12-14 09:25:15,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 09:25:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 255425 states and 369711 transitions. [2022-12-14 09:25:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 09:25:15,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:15,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:25:15,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:25:15,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:25:15,731 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:25:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1749596670, now seen corresponding path program 1 times [2022-12-14 09:25:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:25:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210940761] [2022-12-14 09:25:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:25:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:25:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:25:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:25:15,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:25:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210940761] [2022-12-14 09:25:15,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210940761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:25:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668948975] [2022-12-14 09:25:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:25:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:25:15,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:25:15,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:25:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:25:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:25:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 09:25:16,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:25:16,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668948975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:25:16,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:25:16,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 09:25:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594020817] [2022-12-14 09:25:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:25:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:25:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:25:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:25:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:25:16,104 INFO L87 Difference]: Start difference. First operand 255425 states and 369711 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 09:25:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:32,042 INFO L93 Difference]: Finished difference Result 629449 states and 909157 transitions. [2022-12-14 09:25:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:25:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 159 [2022-12-14 09:25:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:33,015 INFO L225 Difference]: With dead ends: 629449 [2022-12-14 09:25:33,015 INFO L226 Difference]: Without dead ends: 375671 [2022-12-14 09:25:33,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 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 09:25:33,315 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3780 mSDsluCounter, 6400 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3796 SdHoareTripleChecker+Valid, 9615 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:33,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3796 Valid, 9615 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:25:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375671 states. [2022-12-14 09:25:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375671 to 375653. [2022-12-14 09:25:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375653 states, 335977 states have (on average 1.4445899570506315) internal successors, (485349), 337133 states have internal predecessors, (485349), 22431 states have call successors, (22431), 16667 states have call predecessors, (22431), 17243 states have return successors, (30319), 21853 states have call predecessors, (30319), 22431 states have call successors, (30319) [2022-12-14 09:25:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375653 states to 375653 states and 538099 transitions. [2022-12-14 09:25:50,850 INFO L78 Accepts]: Start accepts. Automaton has 375653 states and 538099 transitions. Word has length 159 [2022-12-14 09:25:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 375653 states and 538099 transitions. [2022-12-14 09:25:50,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 09:25:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 375653 states and 538099 transitions. [2022-12-14 09:25:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 09:25:51,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:51,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:25:51,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 09:25:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:51,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:25:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1122388586, now seen corresponding path program 1 times [2022-12-14 09:25:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:25:51,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515303862] [2022-12-14 09:25:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:25:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:25:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:25:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 09:25:51,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:25:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515303862] [2022-12-14 09:25:51,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515303862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:25:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912997319] [2022-12-14 09:25:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:25:51,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:25:51,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:25:51,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:25:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:25:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:25:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:25:52,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:25:52,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912997319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:25:52,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:25:52,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 09:25:52,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647743617] [2022-12-14 09:25:52,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:25:52,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:25:52,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:25:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:25:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:25:52,160 INFO L87 Difference]: Start difference. First operand 375653 states and 538099 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 09:26:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:26:18,191 INFO L93 Difference]: Finished difference Result 924965 states and 1321561 transitions. [2022-12-14 09:26:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:26:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 161 [2022-12-14 09:26:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:26:19,980 INFO L225 Difference]: With dead ends: 924965 [2022-12-14 09:26:19,980 INFO L226 Difference]: Without dead ends: 550959 [2022-12-14 09:26:20,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 160 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 09:26:20,564 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3778 mSDsluCounter, 6395 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3794 SdHoareTripleChecker+Valid, 9610 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:26:20,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3794 Valid, 9610 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:26:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550959 states. [2022-12-14 09:26:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550959 to 550925. [2022-12-14 09:26:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550925 states, 491745 states have (on average 1.4264568017976798) internal successors, (701453), 493477 states have internal predecessors, (701453), 33335 states have call successors, (33335), 24979 states have call predecessors, (33335), 25843 states have return successors, (45007), 32469 states have call predecessors, (45007), 33335 states have call successors, (45007) [2022-12-14 09:26:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550925 states to 550925 states and 779795 transitions. [2022-12-14 09:26:48,653 INFO L78 Accepts]: Start accepts. Automaton has 550925 states and 779795 transitions. Word has length 161 [2022-12-14 09:26:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:26:48,654 INFO L495 AbstractCegarLoop]: Abstraction has 550925 states and 779795 transitions. [2022-12-14 09:26:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 09:26:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 550925 states and 779795 transitions. [2022-12-14 09:26:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 09:26:49,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:26:49,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:26:49,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:26:49,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:26:49,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:26:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:26:49,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1716222766, now seen corresponding path program 1 times [2022-12-14 09:26:49,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:26:49,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95460123] [2022-12-14 09:26:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:26:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:26:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:26:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 09:26:49,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:26:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95460123] [2022-12-14 09:26:49,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95460123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:26:49,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142097342] [2022-12-14 09:26:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:26:49,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:26:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:26:49,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:26:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:26:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:26:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:26:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 09:26:50,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:26:50,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142097342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:26:50,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:26:50,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 09:26:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162317788] [2022-12-14 09:26:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:26:50,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:26:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:26:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:26:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:26:50,054 INFO L87 Difference]: Start difference. First operand 550925 states and 779795 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 09:27:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:22,829 INFO L93 Difference]: Finished difference Result 1062997 states and 1517941 transitions. [2022-12-14 09:27:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:27:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 158 [2022-12-14 09:27:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:24,879 INFO L225 Difference]: With dead ends: 1062997 [2022-12-14 09:27:24,879 INFO L226 Difference]: Without dead ends: 697355 [2022-12-14 09:27:25,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 09:27:25,632 INFO L413 NwaCegarLoop]: 3321 mSDtfsCounter, 111 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6544 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:27:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697355 states. [2022-12-14 09:27:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697355 to 644237. [2022-12-14 09:27:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644237 states, 578145 states have (on average 1.4484065416115335) internal successors, (837389), 579877 states have internal predecessors, (837389), 36791 states have call successors, (36791), 28435 states have call predecessors, (36791), 29299 states have return successors, (48463), 35925 states have call predecessors, (48463), 36791 states have call successors, (48463) [2022-12-14 09:27:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644237 states to 644237 states and 922643 transitions. [2022-12-14 09:27:58,866 INFO L78 Accepts]: Start accepts. Automaton has 644237 states and 922643 transitions. Word has length 158 [2022-12-14 09:27:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:58,866 INFO L495 AbstractCegarLoop]: Abstraction has 644237 states and 922643 transitions. [2022-12-14 09:27:58,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 09:27:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 644237 states and 922643 transitions. [2022-12-14 09:28:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 09:28:00,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:28:00,052 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, 1, 1, 1] [2022-12-14 09:28:00,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:28:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 09:28:00,254 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:28:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:28:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -724339474, now seen corresponding path program 1 times [2022-12-14 09:28:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:28:00,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306510370] [2022-12-14 09:28:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:28:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:28:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:28:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:28:00,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:28:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306510370] [2022-12-14 09:28:00,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306510370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:28:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440737947] [2022-12-14 09:28:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:28:00,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:28:00,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:28:00,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:28:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:28:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:28:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:28:00,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:28:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440737947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:28:00,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:28:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 09:28:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709898072] [2022-12-14 09:28:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:28:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:28:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:28:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:28:00,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:28:00,624 INFO L87 Difference]: Start difference. First operand 644237 states and 922643 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 09:28:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:28:39,398 INFO L93 Difference]: Finished difference Result 1342669 states and 1891833 transitions. [2022-12-14 09:28:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:28:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 159 [2022-12-14 09:28:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:28:41,442 INFO L225 Difference]: With dead ends: 1342669 [2022-12-14 09:28:41,442 INFO L226 Difference]: Without dead ends: 700079 [2022-12-14 09:28:42,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 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 09:28:42,301 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 3782 mSDsluCounter, 6415 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3798 SdHoareTripleChecker+Valid, 9633 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:28:42,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3798 Valid, 9633 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:28:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700079 states. [2022-12-14 09:29:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700079 to 700013. [2022-12-14 09:29:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700013 states, 618673 states have (on average 1.3837503818657029) internal successors, (856089), 621269 states have internal predecessors, (856089), 46071 states have call successors, (46071), 33971 states have call predecessors, (46071), 35267 states have return successors, (63331), 44773 states have call predecessors, (63331), 46071 states have call successors, (63331) [2022-12-14 09:29:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700013 states to 700013 states and 965491 transitions. [2022-12-14 09:29:25,432 INFO L78 Accepts]: Start accepts. Automaton has 700013 states and 965491 transitions. Word has length 159 [2022-12-14 09:29:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:25,432 INFO L495 AbstractCegarLoop]: Abstraction has 700013 states and 965491 transitions. [2022-12-14 09:29:25,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 09:29:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 700013 states and 965491 transitions. [2022-12-14 09:29:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 09:29:26,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:26,705 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, 1, 1, 1, 1] [2022-12-14 09:29:26,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:29:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 09:29:26,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:29:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1233871456, now seen corresponding path program 1 times [2022-12-14 09:29:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225011565] [2022-12-14 09:29:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:29:27,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225011565] [2022-12-14 09:29:27,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225011565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:29:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222094604] [2022-12-14 09:29:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:27,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:27,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:27,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:27,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:29:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:29:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 09:29:27,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:27,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222094604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:27,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:29:27,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 09:29:27,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872872995] [2022-12-14 09:29:27,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:27,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:27,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:29:27,309 INFO L87 Difference]: Start difference. First operand 700013 states and 965491 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 09:30:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:06,128 INFO L93 Difference]: Finished difference Result 988688 states and 1358832 transitions. [2022-12-14 09:30:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:30:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 160 [2022-12-14 09:30:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:08,288 INFO L225 Difference]: With dead ends: 988688 [2022-12-14 09:30:08,288 INFO L226 Difference]: Without dead ends: 748902 [2022-12-14 09:30:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 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 09:30:08,889 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3456 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 6741 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:08,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 6741 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:30:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748902 states. [2022-12-14 09:30:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748902 to 724685. [2022-12-14 09:30:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724685 states, 641463 states have (on average 1.378350738857892) internal successors, (884161), 645066 states have internal predecessors, (884161), 46077 states have call successors, (46077), 33975 states have call predecessors, (46077), 37143 states have return successors, (66073), 45644 states have call predecessors, (66073), 46077 states have call successors, (66073) [2022-12-14 09:30:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724685 states to 724685 states and 996311 transitions. [2022-12-14 09:30:50,918 INFO L78 Accepts]: Start accepts. Automaton has 724685 states and 996311 transitions. Word has length 160 [2022-12-14 09:30:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:50,919 INFO L495 AbstractCegarLoop]: Abstraction has 724685 states and 996311 transitions. [2022-12-14 09:30:50,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 09:30:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 724685 states and 996311 transitions. [2022-12-14 09:30:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 09:30:52,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:52,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:30:52,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 09:30:52,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:52,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:30:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 649368649, now seen corresponding path program 1 times [2022-12-14 09:30:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:30:52,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121203895] [2022-12-14 09:30:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:30:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 09:30:52,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:30:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121203895] [2022-12-14 09:30:52,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121203895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:30:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117220604] [2022-12-14 09:30:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:52,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:30:52,581 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:30:52,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f294a6-b686-4916-8dc6-b18c94c48ef9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:30:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:30:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 09:30:52,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:52,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117220604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:52,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:30:52,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 09:30:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072465620] [2022-12-14 09:30:52,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:30:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:30:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:30:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:30:52,725 INFO L87 Difference]: Start difference. First operand 724685 states and 996311 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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)