./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW --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 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 --- 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-4e7fbc6 [2022-11-23 14:54:23,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:54:23,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:54:23,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:54:23,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:54:23,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:54:23,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:54:23,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:54:23,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:54:23,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:54:23,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:54:23,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:54:23,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:54:23,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:54:23,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:54:23,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:54:23,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:54:23,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:54:23,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:54:23,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:54:23,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:54:23,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:54:23,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:54:23,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:54:23,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:54:23,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:54:23,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:54:23,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:54:23,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:54:23,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:54:23,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:54:23,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:54:23,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:54:23,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:54:23,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:54:23,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:54:23,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:54:23,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:54:23,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:54:23,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:54:23,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:54:23,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:54:23,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:54:23,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:54:23,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:54:23,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:54:23,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:54:23,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:54:23,503 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:54:23,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:54:23,504 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:54:23,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:54:23,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:54:23,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:54:23,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:54:23,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:54:23,506 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:54:23,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:54:23,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:54:23,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:54:23,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:54:23,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:54:23,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:54:23,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:54:23,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:54:23,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:54:23,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:54:23,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:54:23,511 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:54:23,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:54:23,512 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:54:23,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:54:23,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:54:23,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:54:23,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:54:23,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:54:23,514 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:54:23,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:54:23,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:54:23,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:54:23,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:54:23,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:54:23,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:54:23,517 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_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 [2022-11-23 14:54:23,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:54:23,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:54:23,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:54:23,933 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:54:23,934 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:54:23,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2022-11-23 14:54:27,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:54:28,101 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:54:28,102 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2022-11-23 14:54:28,157 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/data/a69638be0/03b1025468344b5d9c5e786cdf9c2cd2/FLAG527a5c95d [2022-11-23 14:54:28,180 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/data/a69638be0/03b1025468344b5d9c5e786cdf9c2cd2 [2022-11-23 14:54:28,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:54:28,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:54:28,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:54:28,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:54:28,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:54:28,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:28" (1/1) ... [2022-11-23 14:54:28,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38616054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:28, skipping insertion in model container [2022-11-23 14:54:28,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:28" (1/1) ... [2022-11-23 14:54:28,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:54:28,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:54:30,958 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2022-11-23 14:54:30,986 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_d7f3f328-9e31-473d-894b-a186476fe950/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2022-11-23 14:54:31,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:54:31,309 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:54:32,619 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_d7f3f328-9e31-473d-894b-a186476fe950/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2022-11-23 14:54:32,623 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_d7f3f328-9e31-473d-894b-a186476fe950/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2022-11-23 14:54:32,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:54:32,708 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:54:32,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32 WrapperNode [2022-11-23 14:54:32,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:54:32,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:54:32,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:54:32,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:54:32,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:32,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,218 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-11-23 14:54:33,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:54:33,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:54:33,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:54:33,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:54:33,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:54:33,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:54:33,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:54:33,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:54:33,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2022-11-23 14:54:33,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:54:33,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:33,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:54:33,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:54:34,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:54:34,023 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 14:54:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 14:54:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:54:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:54:34,024 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 14:54:34,024 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 14:54:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 14:54:34,025 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 14:54:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 14:54:34,025 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 14:54:34,025 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 14:54:34,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 14:54:34,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:54:34,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:54:34,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:54:34,205 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:54:34,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:54:44,743 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:54:47,343 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:54:47,344 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-23 14:54:47,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:47 BoogieIcfgContainer [2022-11-23 14:54:47,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:54:47,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:54:47,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:54:47,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:54:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:54:28" (1/3) ... [2022-11-23 14:54:47,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd71741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:47, skipping insertion in model container [2022-11-23 14:54:47,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (2/3) ... [2022-11-23 14:54:47,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd71741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:47, skipping insertion in model container [2022-11-23 14:54:47,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:47" (3/3) ... [2022-11-23 14:54:47,362 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.07.cil-1.c [2022-11-23 14:54:47,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:54:47,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:54:47,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:54:47,578 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;@48e31584, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:54:47,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:54:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 14:54:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 14:54:47,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:47,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:47,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1084369947, now seen corresponding path program 1 times [2022-11-23 14:54:47,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:47,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649321764] [2022-11-23 14:54:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:48,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649321764] [2022-11-23 14:54:48,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649321764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:48,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:48,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:54:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794560332] [2022-11-23 14:54:48,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:48,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:54:48,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:54:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:54:48,251 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:54:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:49,734 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-11-23 14:54:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:54:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-23 14:54:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:49,770 INFO L225 Difference]: With dead ends: 3668 [2022-11-23 14:54:49,770 INFO L226 Difference]: Without dead ends: 1891 [2022-11-23 14:54:49,783 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 [2022-11-23 14:54:49,787 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:49,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:54:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-23 14:54:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-11-23 14:54:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 14:54:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-11-23 14:54:49,951 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-11-23 14:54:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:49,951 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-11-23 14:54:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:54:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-11-23 14:54:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:54:49,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:49,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:54:49,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1234208912, now seen corresponding path program 1 times [2022-11-23 14:54:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:49,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741716354] [2022-11-23 14:54:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:49,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:54:50,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741716354] [2022-11-23 14:54:50,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741716354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:50,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199221824] [2022-11-23 14:54:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:50,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:50,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:50,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:54:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:50,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:54:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:54:50,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:54:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199221824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:50,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:54:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:54:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357154437] [2022-11-23 14:54:50,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:50,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:50,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:50,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:50,686 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:51,258 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-11-23 14:54:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 14:54:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:51,275 INFO L225 Difference]: With dead ends: 2371 [2022-11-23 14:54:51,276 INFO L226 Difference]: Without dead ends: 2127 [2022-11-23 14:54:51,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:51,280 INFO L413 NwaCegarLoop]: 3258 mSDtfsCounter, 3438 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:51,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3438 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:54:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-11-23 14:54:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-11-23 14:54:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-23 14:54:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-11-23 14:54:51,370 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-11-23 14:54:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:51,371 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-11-23 14:54:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-11-23 14:54:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:54:51,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:51,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:51,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:51,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:51,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 450337902, now seen corresponding path program 1 times [2022-11-23 14:54:51,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:51,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123279103] [2022-11-23 14:54:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:54:51,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:51,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123279103] [2022-11-23 14:54:51,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123279103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498021250] [2022-11-23 14:54:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:51,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:51,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:51,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:51,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:54:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:51,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:54:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:54:52,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:54:52,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498021250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:52,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:54:52,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:54:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173723252] [2022-11-23 14:54:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:52,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:52,078 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:52,697 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-11-23 14:54:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 14:54:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:52,715 INFO L225 Difference]: With dead ends: 3064 [2022-11-23 14:54:52,715 INFO L226 Difference]: Without dead ends: 2587 [2022-11-23 14:54:52,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:52,722 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3435 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:52,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:54:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-11-23 14:54:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-11-23 14:54:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-23 14:54:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-11-23 14:54:52,833 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-11-23 14:54:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:52,833 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-11-23 14:54:52,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-11-23 14:54:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:54:52,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:52,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:52,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:53,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:54:53,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash 953403440, now seen corresponding path program 1 times [2022-11-23 14:54:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19619434] [2022-11-23 14:54:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:54:53,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19619434] [2022-11-23 14:54:53,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19619434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517082092] [2022-11-23 14:54:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:53,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:53,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:53,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:54:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:54:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:54:53,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:54:53,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517082092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:53,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:54:53,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:54:53,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425251183] [2022-11-23 14:54:53,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:53,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:53,535 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:54,178 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-11-23 14:54:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 14:54:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:54,202 INFO L225 Difference]: With dead ends: 4426 [2022-11-23 14:54:54,202 INFO L226 Difference]: Without dead ends: 3491 [2022-11-23 14:54:54,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:54,212 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:54,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:54:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-23 14:54:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-11-23 14:54:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-23 14:54:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-11-23 14:54:54,534 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-11-23 14:54:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:54,534 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-11-23 14:54:54,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-11-23 14:54:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:54:54,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:54,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:54,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:54,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash -482054798, now seen corresponding path program 1 times [2022-11-23 14:54:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308122669] [2022-11-23 14:54:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:54,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:54:54,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308122669] [2022-11-23 14:54:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308122669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328255993] [2022-11-23 14:54:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:54,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:54,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:54:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:55,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:54:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:54:55,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:54:55,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328255993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:55,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:54:55,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:54:55,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711516048] [2022-11-23 14:54:55,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:55,295 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:56,055 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-11-23 14:54:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 14:54:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:56,086 INFO L225 Difference]: With dead ends: 7102 [2022-11-23 14:54:56,087 INFO L226 Difference]: Without dead ends: 5267 [2022-11-23 14:54:56,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:56,098 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:56,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:54:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-11-23 14:54:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-11-23 14:54:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-23 14:54:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-11-23 14:54:56,434 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-11-23 14:54:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:56,434 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-11-23 14:54:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:54:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-11-23 14:54:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:54:56,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:56,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:56,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:56,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1016943564, now seen corresponding path program 1 times [2022-11-23 14:54:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407628339] [2022-11-23 14:54:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:54:56,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407628339] [2022-11-23 14:54:56,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407628339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:56,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:56,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:54:56,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661856301] [2022-11-23 14:54:56,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:56,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:56,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:56,815 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:54:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:57,663 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-11-23 14:54:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:57,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-23 14:54:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:57,707 INFO L225 Difference]: With dead ends: 8051 [2022-11-23 14:54:57,707 INFO L226 Difference]: Without dead ends: 6209 [2022-11-23 14:54:57,717 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 [2022-11-23 14:54:57,720 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:57,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:54:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-11-23 14:54:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-11-23 14:54:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-23 14:54:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-11-23 14:54:58,135 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-11-23 14:54:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:58,137 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-11-23 14:54:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:54:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-11-23 14:54:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 14:54:58,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:58,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:54:58,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1067885439, now seen corresponding path program 1 times [2022-11-23 14:54:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:58,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652366336] [2022-11-23 14:54:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:54:58,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652366336] [2022-11-23 14:54:58,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652366336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:58,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:58,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:54:58,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716913796] [2022-11-23 14:54:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:58,396 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:54:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:59,175 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-11-23 14:54:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 14:54:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:59,227 INFO L225 Difference]: With dead ends: 14230 [2022-11-23 14:54:59,227 INFO L226 Difference]: Without dead ends: 9987 [2022-11-23 14:54:59,246 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 [2022-11-23 14:54:59,247 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:59,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:54:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-11-23 14:54:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-11-23 14:54:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-23 14:54:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-11-23 14:54:59,728 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-11-23 14:54:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:59,729 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-11-23 14:54:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:54:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-11-23 14:54:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 14:54:59,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:59,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:54:59,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 979900197, now seen corresponding path program 1 times [2022-11-23 14:54:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978786979] [2022-11-23 14:54:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:54:59,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:59,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978786979] [2022-11-23 14:54:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978786979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:59,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:59,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:54:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106810934] [2022-11-23 14:54:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:59,858 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:55:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:01,220 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-11-23 14:55:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:55:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 14:55:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:01,294 INFO L225 Difference]: With dead ends: 26230 [2022-11-23 14:55:01,294 INFO L226 Difference]: Without dead ends: 17939 [2022-11-23 14:55:01,324 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 [2022-11-23 14:55:01,325 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:01,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:55:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-23 14:55:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-11-23 14:55:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-23 14:55:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-11-23 14:55:02,407 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-11-23 14:55:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:02,409 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-11-23 14:55:02,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:55:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-11-23 14:55:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 14:55:02,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:02,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:55:02,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1927206958, now seen corresponding path program 1 times [2022-11-23 14:55:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919385585] [2022-11-23 14:55:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:55:02,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:55:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919385585] [2022-11-23 14:55:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919385585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:55:02,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:55:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:55:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206424915] [2022-11-23 14:55:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:55:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:55:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:55:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:55:02,594 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:55:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:04,903 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-11-23 14:55:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:55:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 14:55:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:05,068 INFO L225 Difference]: With dead ends: 49654 [2022-11-23 14:55:05,069 INFO L226 Difference]: Without dead ends: 33459 [2022-11-23 14:55:05,132 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 [2022-11-23 14:55:05,134 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:05,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:55:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-11-23 14:55:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-11-23 14:55:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-23 14:55:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-11-23 14:55:07,243 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-11-23 14:55:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:07,243 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-11-23 14:55:07,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:55:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-11-23 14:55:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 14:55:07,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:07,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:55:07,410 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 8907911, now seen corresponding path program 1 times [2022-11-23 14:55:07,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248510841] [2022-11-23 14:55:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 14:55:07,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:55:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248510841] [2022-11-23 14:55:07,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248510841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:55:07,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:55:07,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:55:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183650547] [2022-11-23 14:55:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:55:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:55:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:55:07,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:55:07,544 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:55:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:11,171 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-11-23 14:55:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:55:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-23 14:55:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:11,425 INFO L225 Difference]: With dead ends: 84725 [2022-11-23 14:55:11,425 INFO L226 Difference]: Without dead ends: 53107 [2022-11-23 14:55:11,492 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 [2022-11-23 14:55:11,493 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:11,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:55:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-11-23 14:55:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-11-23 14:55:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2022-11-23 14:55:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-11-23 14:55:14,666 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-11-23 14:55:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:14,667 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-11-23 14:55:14,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:55:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-11-23 14:55:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 14:55:15,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:15,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:55:15,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash 888066141, now seen corresponding path program 2 times [2022-11-23 14:55:15,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:15,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118452715] [2022-11-23 14:55:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 14:55:15,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:55:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118452715] [2022-11-23 14:55:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118452715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:55:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379718488] [2022-11-23 14:55:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:55:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:55:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:55:15,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:55:15,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:55:15,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:55:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:55:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:55:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:55:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:55:15,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:55:15,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379718488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:55:15,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:55:15,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:55:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593382051] [2022-11-23 14:55:15,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:55:15,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:55:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:55:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:55:15,542 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:55:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:18,783 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-11-23 14:55:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:55:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-23 14:55:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:19,042 INFO L225 Difference]: With dead ends: 87933 [2022-11-23 14:55:19,043 INFO L226 Difference]: Without dead ends: 65083 [2022-11-23 14:55:19,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:55:19,091 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:19,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6558 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:55:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-11-23 14:55:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-11-23 14:55:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-23 14:55:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-11-23 14:55:22,785 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-11-23 14:55:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:22,786 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-11-23 14:55:22,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:55:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-11-23 14:55:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 14:55:22,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:22,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:22,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:55:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:55:23,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1776291278, now seen corresponding path program 3 times [2022-11-23 14:55:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779991402] [2022-11-23 14:55:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:55:23,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:55:23,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779991402] [2022-11-23 14:55:23,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779991402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:55:23,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119363344] [2022-11-23 14:55:23,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:55:23,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:55:23,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:55:23,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:55:23,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:55:23,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:55:23,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:55:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:55:23,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:55:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:55:23,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:55:23,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119363344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:55:23,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:55:23,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:55:23,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413172689] [2022-11-23 14:55:23,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:55:23,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:55:23,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:23,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:55:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:55:23,808 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:55:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:55:27,124 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-11-23 14:55:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:55:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-23 14:55:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:55:27,342 INFO L225 Difference]: With dead ends: 88477 [2022-11-23 14:55:27,342 INFO L226 Difference]: Without dead ends: 59259 [2022-11-23 14:55:27,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:55:27,583 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6559 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:55:27,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:55:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-11-23 14:55:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-11-23 14:55:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-23 14:55:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-11-23 14:55:30,432 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-11-23 14:55:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:55:30,433 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-11-23 14:55:30,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 14:55:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-11-23 14:55:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 14:55:30,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:55:30,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:55:30,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:55:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:55:30,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:55:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:55:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1995355347, now seen corresponding path program 1 times [2022-11-23 14:55:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:55:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936440866] [2022-11-23 14:55:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:55:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 14:55:31,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:55:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936440866] [2022-11-23 14:55:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936440866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:55:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261518252] [2022-11-23 14:55:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:55:31,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:55:31,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:55:31,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:55:31,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7f3f328-9e31-473d-894b-a186476fe950/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:55:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:55:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:55:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:55:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:55:31,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:55:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261518252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:55:31,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:55:31,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:55:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753562219] [2022-11-23 14:55:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:55:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:55:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:55:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:55:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:55:31,460 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)