./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/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_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/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_182b458a-c07d-470e-9011-74b281d1321e/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 aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 --- 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 10:54:21,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:54:21,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:54:22,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:54:22,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:54:22,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:54:22,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:54:22,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:54:22,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:54:22,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:54:22,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:54:22,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:54:22,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:54:22,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:54:22,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:54:22,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:54:22,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:54:22,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:54:22,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:54:22,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:54:22,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:54:22,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:54:22,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:54:22,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:54:22,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:54:22,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:54:22,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:54:22,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:54:22,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:54:22,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:54:22,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:54:22,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:54:22,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:54:22,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:54:22,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:54:22,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:54:22,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:54:22,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:54:22,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:54:22,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:54:22,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:54:22,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:54:22,074 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:54:22,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:54:22,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:54:22,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:54:22,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:54:22,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:54:22,075 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:54:22,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:54:22,076 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:54:22,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:54:22,076 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:54:22,076 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:54:22,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:54:22,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:54:22,077 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:54:22,077 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:54:22,077 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:54:22,078 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:54:22,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:54:22,078 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:54:22,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:54:22,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:54:22,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:54:22,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:54:22,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:54:22,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:54:22,080 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:54:22,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:54:22,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:54:22,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:54:22,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:54:22,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:54:22,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:54:22,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:54:22,081 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:54:22,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:54:22,083 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_182b458a-c07d-470e-9011-74b281d1321e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 [2022-12-14 10:54:22,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:54:22,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:54:22,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:54:22,287 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:54:22,288 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:54:22,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c [2022-12-14 10:54:24,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:54:25,262 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:54:25,262 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c [2022-12-14 10:54:25,297 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/data/18fce0d87/29f48e2bf855470d8f0ae2c971f98ab4/FLAG287ad0676 [2022-12-14 10:54:25,307 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/data/18fce0d87/29f48e2bf855470d8f0ae2c971f98ab4 [2022-12-14 10:54:25,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:54:25,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:54:25,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:54:25,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:54:25,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:54:25,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:54:25" (1/1) ... [2022-12-14 10:54:25,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f31cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:25, skipping insertion in model container [2022-12-14 10:54:25,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:54:25" (1/1) ... [2022-12-14 10:54:25,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:54:25,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:54:26,790 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_182b458a-c07d-470e-9011-74b281d1321e/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2022-12-14 10:54:26,822 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_182b458a-c07d-470e-9011-74b281d1321e/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2022-12-14 10:54:27,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:54:27,017 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:54:27,794 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_182b458a-c07d-470e-9011-74b281d1321e/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2022-12-14 10:54:27,799 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_182b458a-c07d-470e-9011-74b281d1321e/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2022-12-14 10:54:27,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:54:27,853 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:54:27,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27 WrapperNode [2022-12-14 10:54:27,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:54:27,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:54:27,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:54:27,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:54:27,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:27,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,111 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-12-14 10:54:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:54:28,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:54:28,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:54:28,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:54:28,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:54:28,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:54:28,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:54:28,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:54:28,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (1/1) ... [2022-12-14 10:54:28,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:54:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:28,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:54:28,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 10:54:28,512 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 10:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 10:54:28,512 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 10:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 10:54:28,513 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 10:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 10:54:28,513 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 10:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 10:54:28,513 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 10:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 10:54:28,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 10:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:54:28,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:54:28,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:54:28,613 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:54:28,615 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:54:34,164 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:54:35,587 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:54:35,587 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 10:54:35,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:54:35 BoogieIcfgContainer [2022-12-14 10:54:35,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:54:35,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:54:35,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:54:35,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:54:35,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:54:25" (1/3) ... [2022-12-14 10:54:35,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b993a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:54:35, skipping insertion in model container [2022-12-14 10:54:35,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:54:27" (2/3) ... [2022-12-14 10:54:35,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b993a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:54:35, skipping insertion in model container [2022-12-14 10:54:35,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:54:35" (3/3) ... [2022-12-14 10:54:35,597 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.08.cil-1.c [2022-12-14 10:54:35,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:54:35,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 10:54:35,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:54:35,683 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;@3f0cd568, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:54:35,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 10:54:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 10:54:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:54:35,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:35,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:35,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2028950132, now seen corresponding path program 1 times [2022-12-14 10:54:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:35,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313201401] [2022-12-14 10:54:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:36,084 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 10:54:36,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313201401] [2022-12-14 10:54:36,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313201401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:36,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:36,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:54:36,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635663874] [2022-12-14 10:54:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:54:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:54:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:54:36,124 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:54:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:36,884 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-12-14 10:54:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:54:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-12-14 10:54:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:36,900 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 10:54:36,901 INFO L226 Difference]: Without dead ends: 1913 [2022-12-14 10:54:36,906 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 10:54:36,909 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:36,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:54:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-12-14 10:54:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-12-14 10:54:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 10:54:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-12-14 10:54:36,996 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-12-14 10:54:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:36,996 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-12-14 10:54:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:54:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-12-14 10:54:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:54:37,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:37,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:54:37,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:37,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1160250700, now seen corresponding path program 1 times [2022-12-14 10:54:37,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8882832] [2022-12-14 10:54:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:37,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:54:37,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:37,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8882832] [2022-12-14 10:54:37,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8882832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:37,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434725891] [2022-12-14 10:54:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:37,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:37,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:54:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:54:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:54:37,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:37,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434725891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:37,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:54:37,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122344676] [2022-12-14 10:54:37,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:37,406 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:37,794 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-12-14 10:54:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 10:54:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:37,805 INFO L225 Difference]: With dead ends: 2437 [2022-12-14 10:54:37,805 INFO L226 Difference]: Without dead ends: 2171 [2022-12-14 10:54:37,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:37,808 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:37,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-12-14 10:54:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-12-14 10:54:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 10:54:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-12-14 10:54:37,857 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-12-14 10:54:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:37,857 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-12-14 10:54:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-12-14 10:54:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:54:37,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:37,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:37,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:38,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:38,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash 300681964, now seen corresponding path program 1 times [2022-12-14 10:54:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387588445] [2022-12-14 10:54:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:54:38,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:38,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387588445] [2022-12-14 10:54:38,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387588445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:38,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434703155] [2022-12-14 10:54:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:38,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:38,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:38,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:38,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:54:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:54:38,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:54:38,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:38,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434703155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:38,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:38,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:54:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571240826] [2022-12-14 10:54:38,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:38,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:38,392 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:38,804 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-12-14 10:54:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 10:54:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:38,814 INFO L225 Difference]: With dead ends: 3196 [2022-12-14 10:54:38,814 INFO L226 Difference]: Without dead ends: 2675 [2022-12-14 10:54:38,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:38,817 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:38,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3439 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-12-14 10:54:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-12-14 10:54:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 10:54:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-12-14 10:54:38,878 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-12-14 10:54:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:38,878 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-12-14 10:54:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-12-14 10:54:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:54:38,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:38,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:38,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:54:39,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:39,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash -893560692, now seen corresponding path program 1 times [2022-12-14 10:54:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:39,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176057062] [2022-12-14 10:54:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:54:39,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:39,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176057062] [2022-12-14 10:54:39,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176057062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:39,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272932668] [2022-12-14 10:54:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:39,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:39,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:39,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:54:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:54:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:54:39,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:39,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272932668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:39,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:39,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:54:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809473951] [2022-12-14 10:54:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:39,347 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:39,767 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-12-14 10:54:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 10:54:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:39,780 INFO L225 Difference]: With dead ends: 4690 [2022-12-14 10:54:39,780 INFO L226 Difference]: Without dead ends: 3667 [2022-12-14 10:54:39,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:39,784 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:39,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-12-14 10:54:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-12-14 10:54:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 10:54:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-12-14 10:54:39,868 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-12-14 10:54:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-12-14 10:54:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-12-14 10:54:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:54:39,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:39,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:39,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:54:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:40,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 932554476, now seen corresponding path program 1 times [2022-12-14 10:54:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777727954] [2022-12-14 10:54:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:54:40,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777727954] [2022-12-14 10:54:40,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777727954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059288870] [2022-12-14 10:54:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:40,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:40,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:40,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:54:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:54:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:54:40,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:40,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059288870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:40,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:40,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:54:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87492056] [2022-12-14 10:54:40,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:40,437 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:40,889 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-12-14 10:54:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 10:54:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:40,908 INFO L225 Difference]: With dead ends: 7630 [2022-12-14 10:54:40,908 INFO L226 Difference]: Without dead ends: 5619 [2022-12-14 10:54:40,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:40,915 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:40,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-12-14 10:54:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-12-14 10:54:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 10:54:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-12-14 10:54:41,039 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-12-14 10:54:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:41,039 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-12-14 10:54:41,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:54:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-12-14 10:54:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:54:41,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:41,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:41,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:54:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:41,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -759798644, now seen corresponding path program 1 times [2022-12-14 10:54:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:41,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129306856] [2022-12-14 10:54:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:54:41,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129306856] [2022-12-14 10:54:41,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129306856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:41,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:41,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:54:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615551167] [2022-12-14 10:54:41,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:41,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:54:41,319 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:54:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:41,740 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-12-14 10:54:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-12-14 10:54:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:41,761 INFO L225 Difference]: With dead ends: 8675 [2022-12-14 10:54:41,761 INFO L226 Difference]: Without dead ends: 6657 [2022-12-14 10:54:41,767 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 10:54:41,768 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:41,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-12-14 10:54:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-12-14 10:54:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 10:54:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-12-14 10:54:41,993 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-12-14 10:54:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:41,994 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-12-14 10:54:41,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:54:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-12-14 10:54:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 10:54:42,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:42,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:54:42,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1829045057, now seen corresponding path program 1 times [2022-12-14 10:54:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030240474] [2022-12-14 10:54:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:54:42,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030240474] [2022-12-14 10:54:42,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030240474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:42,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:42,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:54:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088776753] [2022-12-14 10:54:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:42,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:54:42,092 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:42,654 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-12-14 10:54:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 10:54:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:42,682 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 10:54:42,683 INFO L226 Difference]: Without dead ends: 10851 [2022-12-14 10:54:42,693 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 10:54:42,693 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:42,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-12-14 10:54:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-12-14 10:54:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 10:54:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-12-14 10:54:42,975 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-12-14 10:54:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:42,975 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-12-14 10:54:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-12-14 10:54:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 10:54:42,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:42,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:42,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:54:42,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash 612074654, now seen corresponding path program 1 times [2022-12-14 10:54:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:42,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109851817] [2022-12-14 10:54:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:54:43,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109851817] [2022-12-14 10:54:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109851817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:43,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:43,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:54:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317770533] [2022-12-14 10:54:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:43,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:54:43,052 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:43,838 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-12-14 10:54:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 10:54:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:43,878 INFO L225 Difference]: With dead ends: 28822 [2022-12-14 10:54:43,878 INFO L226 Difference]: Without dead ends: 19667 [2022-12-14 10:54:43,893 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 10:54:43,893 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:43,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-12-14 10:54:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-12-14 10:54:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 10:54:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-12-14 10:54:44,387 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-12-14 10:54:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:44,387 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-12-14 10:54:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-12-14 10:54:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 10:54:44,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:44,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:54:44,409 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2108220312, now seen corresponding path program 1 times [2022-12-14 10:54:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198555209] [2022-12-14 10:54:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:54:44,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198555209] [2022-12-14 10:54:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198555209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:44,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:44,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:54:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829892089] [2022-12-14 10:54:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:54:44,469 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:45,678 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-12-14 10:54:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:45,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 10:54:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:45,761 INFO L225 Difference]: With dead ends: 54838 [2022-12-14 10:54:45,762 INFO L226 Difference]: Without dead ends: 36915 [2022-12-14 10:54:45,802 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 10:54:45,802 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:45,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-12-14 10:54:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-12-14 10:54:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 10:54:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-12-14 10:54:46,821 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-12-14 10:54:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:46,821 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-12-14 10:54:46,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-12-14 10:54:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 10:54:46,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:46,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:46,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:54:46,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash -742764316, now seen corresponding path program 1 times [2022-12-14 10:54:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088740521] [2022-12-14 10:54:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:54:46,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:46,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088740521] [2022-12-14 10:54:46,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088740521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:46,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:46,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:54:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654892702] [2022-12-14 10:54:46,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:54:46,925 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:48,990 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-12-14 10:54:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 10:54:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:49,153 INFO L225 Difference]: With dead ends: 105718 [2022-12-14 10:54:49,153 INFO L226 Difference]: Without dead ends: 70643 [2022-12-14 10:54:49,222 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 10:54:49,222 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:49,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-12-14 10:54:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-12-14 10:54:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 10:54:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-12-14 10:54:51,538 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-12-14 10:54:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:51,539 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-12-14 10:54:51,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:54:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-12-14 10:54:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 10:54:51,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:51,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:54:51,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1507032219, now seen corresponding path program 1 times [2022-12-14 10:54:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775619647] [2022-12-14 10:54:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 10:54:52,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775619647] [2022-12-14 10:54:52,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775619647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:52,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510845102] [2022-12-14 10:54:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:52,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:52,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:52,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:54:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:54:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:54:52,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:52,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510845102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:52,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:52,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:54:52,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973564215] [2022-12-14 10:54:52,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:52,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:52,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:52,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:52,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:54:52,360 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:54:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:54,977 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-12-14 10:54:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:54,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 10:54:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:55,224 INFO L225 Difference]: With dead ends: 133109 [2022-12-14 10:54:55,225 INFO L226 Difference]: Without dead ends: 98035 [2022-12-14 10:54:55,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:54:55,287 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:55,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:54:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-12-14 10:54:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-12-14 10:54:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 10:54:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-12-14 10:54:58,551 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-12-14 10:54:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:58,552 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-12-14 10:54:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:54:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-12-14 10:54:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 10:54:58,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:58,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:58,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:54:58,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:54:58,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1622561795, now seen corresponding path program 2 times [2022-12-14 10:54:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:58,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967550917] [2022-12-14 10:54:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:58,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:54:59,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967550917] [2022-12-14 10:54:59,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967550917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:59,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142111016] [2022-12-14 10:54:59,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:54:59,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:59,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:59,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:59,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:54:59,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:54:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:54:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:54:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 10:54:59,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:59,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142111016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:59,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:59,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:54:59,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677205083] [2022-12-14 10:54:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:59,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:54:59,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:54:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:54:59,399 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:02,129 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-12-14 10:55:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:55:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 10:55:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:02,329 INFO L225 Difference]: With dead ends: 135285 [2022-12-14 10:55:02,329 INFO L226 Difference]: Without dead ends: 85363 [2022-12-14 10:55:02,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:02,414 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:02,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:55:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-12-14 10:55:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-12-14 10:55:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 10:55:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-12-14 10:55:05,142 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-12-14 10:55:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:05,143 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-12-14 10:55:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions. [2022-12-14 10:55:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 10:55:05,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:05,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:55:05,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:55:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:55:05,473 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1105921025, now seen corresponding path program 1 times [2022-12-14 10:55:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772426982] [2022-12-14 10:55:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:55:05,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772426982] [2022-12-14 10:55:05,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772426982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157002942] [2022-12-14 10:55:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:05,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:05,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:05,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:05,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:55:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:55:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 10:55:05,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:05,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157002942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:05,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:05,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:55:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815074977] [2022-12-14 10:55:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:55:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:55:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:05,851 INFO L87 Difference]: Start difference. First operand 84849 states and 126159 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:55:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:09,209 INFO L93 Difference]: Finished difference Result 127669 states and 191953 transitions. [2022-12-14 10:55:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:55:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 10:55:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:09,408 INFO L225 Difference]: With dead ends: 127669 [2022-12-14 10:55:09,408 INFO L226 Difference]: Without dead ends: 85107 [2022-12-14 10:55:09,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:09,496 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 172 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6595 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:09,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6595 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:55:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85107 states. [2022-12-14 10:55:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85107 to 84209. [2022-12-14 10:55:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84209 states, 72683 states have (on average 1.4926048732165706) internal successors, (108487), 72941 states have internal predecessors, (108487), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 10:55:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84209 states to 84209 states and 124111 transitions. [2022-12-14 10:55:12,280 INFO L78 Accepts]: Start accepts. Automaton has 84209 states and 124111 transitions. Word has length 167 [2022-12-14 10:55:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:12,281 INFO L495 AbstractCegarLoop]: Abstraction has 84209 states and 124111 transitions. [2022-12-14 10:55:12,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:55:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 84209 states and 124111 transitions. [2022-12-14 10:55:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 10:55:12,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:12,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:55:12,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:55:12,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:55:12,608 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 864493885, now seen corresponding path program 1 times [2022-12-14 10:55:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:12,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371550438] [2022-12-14 10:55:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:55:12,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371550438] [2022-12-14 10:55:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371550438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501194196] [2022-12-14 10:55:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:12,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:12,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:55:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:55:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 10:55:12,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501194196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:12,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:12,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:55:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845563959] [2022-12-14 10:55:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:55:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:55:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:12,946 INFO L87 Difference]: Start difference. First operand 84209 states and 124111 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:15,825 INFO L93 Difference]: Finished difference Result 144493 states and 209034 transitions. [2022-12-14 10:55:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:55:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 10:55:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:16,069 INFO L225 Difference]: With dead ends: 144493 [2022-12-14 10:55:16,069 INFO L226 Difference]: Without dead ends: 102891 [2022-12-14 10:55:16,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:16,162 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3451 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:16,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3305 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:55:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-12-14 10:55:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-12-14 10:55:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 89833 states have (on average 1.4384580276735721) internal successors, (129221), 90091 states have internal predecessors, (129221), 8322 states have call successors, (8322), 4734 states have call predecessors, (8322), 4734 states have return successors, (8322), 8066 states have call predecessors, (8322), 8322 states have call successors, (8322) [2022-12-14 10:55:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 145865 transitions. [2022-12-14 10:55:19,806 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 145865 transitions. Word has length 167 [2022-12-14 10:55:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:19,807 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 145865 transitions. [2022-12-14 10:55:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 145865 transitions. [2022-12-14 10:55:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 10:55:19,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:19,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:55:19,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:55:20,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 10:55:20,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1153006966, now seen corresponding path program 1 times [2022-12-14 10:55:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824289443] [2022-12-14 10:55:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:55:20,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824289443] [2022-12-14 10:55:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824289443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375796457] [2022-12-14 10:55:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:20,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:20,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:20,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:55:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:55:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:55:20,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375796457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:20,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 10:55:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476260693] [2022-12-14 10:55:20,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:55:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:55:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:55:20,536 INFO L87 Difference]: Start difference. First operand 102891 states and 145865 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:55:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:26,871 INFO L93 Difference]: Finished difference Result 309085 states and 435513 transitions. [2022-12-14 10:55:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:55:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 168 [2022-12-14 10:55:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:27,405 INFO L225 Difference]: With dead ends: 309085 [2022-12-14 10:55:27,406 INFO L226 Difference]: Without dead ends: 207841 [2022-12-14 10:55:27,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:55:27,541 INFO L413 NwaCegarLoop]: 3427 mSDtfsCounter, 3477 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 6985 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:27,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 6985 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:55:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207841 states. [2022-12-14 10:55:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207841 to 207583. [2022-12-14 10:55:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207583 states, 181477 states have (on average 1.4215851044484975) internal successors, (257985), 182247 states have internal predecessors, (257985), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9722 states have return successors, (17150), 15870 states have call predecessors, (17150), 16382 states have call successors, (17150) [2022-12-14 10:55:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207583 states to 207583 states and 291517 transitions. [2022-12-14 10:55:34,942 INFO L78 Accepts]: Start accepts. Automaton has 207583 states and 291517 transitions. Word has length 168 [2022-12-14 10:55:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:34,943 INFO L495 AbstractCegarLoop]: Abstraction has 207583 states and 291517 transitions. [2022-12-14 10:55:34,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:55:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 207583 states and 291517 transitions. [2022-12-14 10:55:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 10:55:35,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:35,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:55:35,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 10:55:35,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:35,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2060478555, now seen corresponding path program 1 times [2022-12-14 10:55:35,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360927147] [2022-12-14 10:55:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:55:35,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360927147] [2022-12-14 10:55:35,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360927147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024937208] [2022-12-14 10:55:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:35,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:35,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:55:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:55:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:55:35,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024937208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:35,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:55:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857094380] [2022-12-14 10:55:35,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:35,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:55:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:55:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:35,845 INFO L87 Difference]: Start difference. First operand 207583 states and 291517 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:55:45,411 INFO L93 Difference]: Finished difference Result 491081 states and 701088 transitions. [2022-12-14 10:55:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:55:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 10:55:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:55:46,206 INFO L225 Difference]: With dead ends: 491081 [2022-12-14 10:55:46,207 INFO L226 Difference]: Without dead ends: 285145 [2022-12-14 10:55:46,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:55:46,458 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 93 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:55:46,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6486 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:55:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285145 states. [2022-12-14 10:55:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285145 to 236267. [2022-12-14 10:55:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236267 states, 208619 states have (on average 1.4526337486039143) internal successors, (303047), 209391 states have internal predecessors, (303047), 17153 states have call successors, (17153), 10237 states have call predecessors, (17153), 10493 states have return successors, (17921), 16639 states have call predecessors, (17921), 17153 states have call successors, (17921) [2022-12-14 10:55:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236267 states to 236267 states and 338121 transitions. [2022-12-14 10:55:55,567 INFO L78 Accepts]: Start accepts. Automaton has 236267 states and 338121 transitions. Word has length 168 [2022-12-14 10:55:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:55:55,567 INFO L495 AbstractCegarLoop]: Abstraction has 236267 states and 338121 transitions. [2022-12-14 10:55:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:55:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 236267 states and 338121 transitions. [2022-12-14 10:55:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 10:55:55,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:55:55,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:55:55,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:55:56,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:55:56,130 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:55:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:55:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1986444868, now seen corresponding path program 1 times [2022-12-14 10:55:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:55:56,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757771704] [2022-12-14 10:55:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:56,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:55:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 10:55:56,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:55:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757771704] [2022-12-14 10:55:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757771704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:55:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655036689] [2022-12-14 10:55:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:55:56,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:55:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:55:56,275 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:55:56,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:55:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:55:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:55:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:55:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 10:55:56,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:55:56,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655036689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:55:56,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:55:56,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:55:56,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098919158] [2022-12-14 10:55:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:55:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:55:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:55:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:55:56,512 INFO L87 Difference]: Start difference. First operand 236267 states and 338121 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:56:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:10,912 INFO L93 Difference]: Finished difference Result 583639 states and 833651 transitions. [2022-12-14 10:56:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:56:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2022-12-14 10:56:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:11,923 INFO L225 Difference]: With dead ends: 583639 [2022-12-14 10:56:11,923 INFO L226 Difference]: Without dead ends: 349019 [2022-12-14 10:56:12,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:56:12,307 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 7220 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7237 SdHoareTripleChecker+Valid, 9579 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:12,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7237 Valid, 9579 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:56:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349019 states. [2022-12-14 10:56:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349019 to 349017. [2022-12-14 10:56:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349017 states, 307813 states have (on average 1.4412939024667575) internal successors, (443649), 308969 states have internal predecessors, (443649), 25467 states have call successors, (25467), 15351 states have call predecessors, (25467), 15735 states have return successors, (26619), 24697 states have call predecessors, (26619), 25467 states have call successors, (26619) [2022-12-14 10:56:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349017 states to 349017 states and 495735 transitions. [2022-12-14 10:56:27,534 INFO L78 Accepts]: Start accepts. Automaton has 349017 states and 495735 transitions. Word has length 169 [2022-12-14 10:56:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:27,535 INFO L495 AbstractCegarLoop]: Abstraction has 349017 states and 495735 transitions. [2022-12-14 10:56:27,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:56:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 349017 states and 495735 transitions. [2022-12-14 10:56:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 10:56:28,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:28,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:28,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:56:28,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:56:28,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:56:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1687106532, now seen corresponding path program 1 times [2022-12-14 10:56:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:56:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269441912] [2022-12-14 10:56:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:56:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:56:28,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:56:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269441912] [2022-12-14 10:56:28,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269441912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:56:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145338500] [2022-12-14 10:56:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:28,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:56:28,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:56:28,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:56:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:56:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 10:56:28,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145338500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:28,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:56:28,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:56:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469697896] [2022-12-14 10:56:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:56:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:56:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:56:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:56:28,677 INFO L87 Difference]: Start difference. First operand 349017 states and 495735 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:56:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:52,785 INFO L93 Difference]: Finished difference Result 862081 states and 1222013 transitions. [2022-12-14 10:56:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:56:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 171 [2022-12-14 10:56:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:54,294 INFO L225 Difference]: With dead ends: 862081 [2022-12-14 10:56:54,294 INFO L226 Difference]: Without dead ends: 514711 [2022-12-14 10:56:54,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:56:54,774 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3836 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 9654 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:54,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 9654 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:56:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514711 states. [2022-12-14 10:57:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514711 to 514709. [2022-12-14 10:57:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514709 states, 453305 states have (on average 1.428629730534629) internal successors, (647605), 455037 states have internal predecessors, (647605), 37807 states have call successors, (37807), 23019 states have call predecessors, (37807), 23595 states have return successors, (39535), 36653 states have call predecessors, (39535), 37807 states have call successors, (39535) [2022-12-14 10:57:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514709 states to 514709 states and 724947 transitions. [2022-12-14 10:57:20,671 INFO L78 Accepts]: Start accepts. Automaton has 514709 states and 724947 transitions. Word has length 171 [2022-12-14 10:57:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:20,671 INFO L495 AbstractCegarLoop]: Abstraction has 514709 states and 724947 transitions. [2022-12-14 10:57:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:57:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 514709 states and 724947 transitions. [2022-12-14 10:57:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 10:57:21,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:57:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:57:21,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:57:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash 152144636, now seen corresponding path program 1 times [2022-12-14 10:57:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987191421] [2022-12-14 10:57:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 10:57:22,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987191421] [2022-12-14 10:57:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987191421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733530958] [2022-12-14 10:57:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:22,050 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:22,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:57:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:57:22,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 10:57:22,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:57:22,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733530958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:22,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:57:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 10:57:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252744081] [2022-12-14 10:57:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:57:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:57:22,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:57:22,261 INFO L87 Difference]: Start difference. First operand 514709 states and 724947 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:57:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:44,752 INFO L93 Difference]: Finished difference Result 923824 states and 1295254 transitions. [2022-12-14 10:57:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:57:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2022-12-14 10:57:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:46,007 INFO L225 Difference]: With dead ends: 923824 [2022-12-14 10:57:46,008 INFO L226 Difference]: Without dead ends: 410762 [2022-12-14 10:57:46,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:57:46,649 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3814 mSDsluCounter, 6461 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:46,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 9703 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:57:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410762 states. [2022-12-14 10:58:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410762 to 394398. [2022-12-14 10:58:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394398 states, 347465 states have (on average 1.4243707999366844) internal successors, (494919), 348908 states have internal predecessors, (494919), 28509 states have call successors, (28509), 17270 states have call predecessors, (28509), 18422 states have return successors, (29661), 28220 states have call predecessors, (29661), 28509 states have call successors, (29661) [2022-12-14 10:58:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394398 states to 394398 states and 553089 transitions. [2022-12-14 10:58:07,895 INFO L78 Accepts]: Start accepts. Automaton has 394398 states and 553089 transitions. Word has length 173 [2022-12-14 10:58:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:07,896 INFO L495 AbstractCegarLoop]: Abstraction has 394398 states and 553089 transitions. [2022-12-14 10:58:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:58:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 394398 states and 553089 transitions. [2022-12-14 10:58:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 10:58:08,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:08,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:08,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:58:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:08,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:58:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1648895164, now seen corresponding path program 2 times [2022-12-14 10:58:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:08,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921724259] [2022-12-14 10:58:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:08,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 10:58:08,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:08,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921724259] [2022-12-14 10:58:08,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921724259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419133159] [2022-12-14 10:58:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:58:08,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:08,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:58:09,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:58:09,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:58:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 10:58:09,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:58:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419133159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:58:09,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:58:09,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:58:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858128593] [2022-12-14 10:58:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:58:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:58:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:58:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:58:09,206 INFO L87 Difference]: Start difference. First operand 394398 states and 553089 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:58:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:28,031 INFO L93 Difference]: Finished difference Result 528260 states and 742294 transitions. [2022-12-14 10:58:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:58:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 174 [2022-12-14 10:58:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:29,037 INFO L225 Difference]: With dead ends: 528260 [2022-12-14 10:58:29,037 INFO L226 Difference]: Without dead ends: 376062 [2022-12-14 10:58:29,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:58:29,305 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 52 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:29,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6479 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:58:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376062 states. [2022-12-14 10:58:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376062 to 352830. [2022-12-14 10:58:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352830 states, 309353 states have (on average 1.4443790750372552) internal successors, (446823), 309932 states have internal predecessors, (446823), 27357 states have call successors, (27357), 16118 states have call predecessors, (27357), 16118 states have return successors, (27357), 26780 states have call predecessors, (27357), 27357 states have call successors, (27357) [2022-12-14 10:58:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352830 states to 352830 states and 501537 transitions. [2022-12-14 10:58:51,870 INFO L78 Accepts]: Start accepts. Automaton has 352830 states and 501537 transitions. Word has length 174 [2022-12-14 10:58:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:51,871 INFO L495 AbstractCegarLoop]: Abstraction has 352830 states and 501537 transitions. [2022-12-14 10:58:51,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:58:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 352830 states and 501537 transitions. [2022-12-14 10:58:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 10:58:52,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:52,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:52,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:58:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:52,853 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:58:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash -750895873, now seen corresponding path program 1 times [2022-12-14 10:58:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964731142] [2022-12-14 10:58:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:58:53,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:53,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964731142] [2022-12-14 10:58:53,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964731142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:53,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373840619] [2022-12-14 10:58:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:53,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:53,082 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:53,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:58:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:58:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 10:58:53,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:58:53,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373840619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:58:53,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:58:53,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:58:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956387161] [2022-12-14 10:58:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:58:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:58:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:58:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:58:53,289 INFO L87 Difference]: Start difference. First operand 352830 states and 501537 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:59:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:24,228 INFO L93 Difference]: Finished difference Result 870278 states and 1234119 transitions. [2022-12-14 10:59:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:59:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 10:59:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:25,815 INFO L225 Difference]: With dead ends: 870278 [2022-12-14 10:59:25,816 INFO L226 Difference]: Without dead ends: 519152 [2022-12-14 10:59:26,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 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 10:59:26,281 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 7201 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7218 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:26,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7218 Valid, 9571 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:59:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519152 states. [2022-12-14 10:59:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519152 to 519150. [2022-12-14 10:59:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519150 states, 454393 states have (on average 1.4295092574049335) internal successors, (649559), 455260 states have internal predecessors, (649559), 40589 states have call successors, (40589), 24166 states have call predecessors, (40589), 24166 states have return successors, (40589), 39724 states have call predecessors, (40589), 40589 states have call successors, (40589) [2022-12-14 10:59:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519150 states to 519150 states and 730737 transitions. [2022-12-14 10:59:56,953 INFO L78 Accepts]: Start accepts. Automaton has 519150 states and 730737 transitions. Word has length 174 [2022-12-14 10:59:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:56,954 INFO L495 AbstractCegarLoop]: Abstraction has 519150 states and 730737 transitions. [2022-12-14 10:59:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:59:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 519150 states and 730737 transitions. [2022-12-14 10:59:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 10:59:57,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:57,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:57,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:58,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 10:59:58,184 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:59:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:58,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2110338378, now seen corresponding path program 1 times [2022-12-14 10:59:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:58,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167746686] [2022-12-14 10:59:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:59:58,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167746686] [2022-12-14 10:59:58,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167746686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990664216] [2022-12-14 10:59:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:58,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:58,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:58,465 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:58,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:59:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:59:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:59:58,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:59:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990664216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:59:58,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:59:58,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:59:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425226342] [2022-12-14 10:59:58,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:59:58,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:59:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:59:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:59:58,660 INFO L87 Difference]: Start difference. First operand 519150 states and 730737 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 11:00:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:35,958 INFO L93 Difference]: Finished difference Result 1006530 states and 1427043 transitions. [2022-12-14 11:00:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:00:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 172 [2022-12-14 11:00:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:37,933 INFO L225 Difference]: With dead ends: 1006530 [2022-12-14 11:00:37,934 INFO L226 Difference]: Without dead ends: 661744 [2022-12-14 11:00:38,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:00:38,622 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 130 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 6596 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:38,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 6596 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:00:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661744 states. [2022-12-14 11:01:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661744 to 603390. [2022-12-14 11:01:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603390 states, 533449 states have (on average 1.4533179366724842) internal successors, (775271), 534316 states have internal predecessors, (775271), 43181 states have call successors, (43181), 26758 states have call predecessors, (43181), 26758 states have return successors, (43181), 42316 states have call predecessors, (43181), 43181 states have call successors, (43181) [2022-12-14 11:01:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603390 states to 603390 states and 861633 transitions. [2022-12-14 11:01:15,578 INFO L78 Accepts]: Start accepts. Automaton has 603390 states and 861633 transitions. Word has length 172 [2022-12-14 11:01:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:15,578 INFO L495 AbstractCegarLoop]: Abstraction has 603390 states and 861633 transitions. [2022-12-14 11:01:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 11:01:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 603390 states and 861633 transitions. [2022-12-14 11:01:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 11:01:16,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:16,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:16,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 11:01:16,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:16,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:01:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1850096139, now seen corresponding path program 1 times [2022-12-14 11:01:16,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:16,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652689603] [2022-12-14 11:01:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:16,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 11:01:17,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652689603] [2022-12-14 11:01:17,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652689603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:17,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779752540] [2022-12-14 11:01:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:17,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:17,180 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:17,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:01:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:01:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:01:17,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:01:17,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779752540] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:01:17,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:01:17,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 11:01:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669846839] [2022-12-14 11:01:17,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:01:17,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:01:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:17,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:01:17,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:01:17,389 INFO L87 Difference]: Start difference. First operand 603390 states and 861633 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:02:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:10,732 INFO L93 Difference]: Finished difference Result 1440566 states and 2049303 transitions. [2022-12-14 11:02:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:02:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 11:02:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:13,466 INFO L225 Difference]: With dead ends: 1440566 [2022-12-14 11:02:13,466 INFO L226 Difference]: Without dead ends: 838880 [2022-12-14 11:02:14,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 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 11:02:14,310 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 7197 mSDsluCounter, 6332 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:14,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 9564 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:02:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838880 states. [2022-12-14 11:03:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838880 to 838878. [2022-12-14 11:03:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838878 states, 738113 states have (on average 1.4352152041760544) internal successors, (1059351), 739412 states have internal predecessors, (1059351), 62373 states have call successors, (62373), 38390 states have call predecessors, (62373), 38390 states have return successors, (62373), 61076 states have call predecessors, (62373), 62373 states have call successors, (62373) [2022-12-14 11:03:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838878 states to 838878 states and 1184097 transitions. [2022-12-14 11:03:17,296 INFO L78 Accepts]: Start accepts. Automaton has 838878 states and 1184097 transitions. Word has length 174 [2022-12-14 11:03:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:17,296 INFO L495 AbstractCegarLoop]: Abstraction has 838878 states and 1184097 transitions. [2022-12-14 11:03:17,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:03:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 838878 states and 1184097 transitions. [2022-12-14 11:03:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 11:03:18,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:18,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:03:18,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 11:03:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 11:03:18,927 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1039281951, now seen corresponding path program 1 times [2022-12-14 11:03:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:18,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594205368] [2022-12-14 11:03:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:18,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 11:03:19,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594205368] [2022-12-14 11:03:19,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594205368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:03:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025156013] [2022-12-14 11:03:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:19,082 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_182b458a-c07d-470e-9011-74b281d1321e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:03:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:19,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:03:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 11:03:19,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:03:19,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025156013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:03:19,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:03:19,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 11:03:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861287182] [2022-12-14 11:03:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:03:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:03:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:03:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:03:19,308 INFO L87 Difference]: Start difference. First operand 838878 states and 1184097 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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)