./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9 --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 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 --- 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-6b4ec56 [2022-11-20 21:21:25,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:21:25,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:21:25,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:21:25,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:21:25,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:21:25,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:21:25,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:21:25,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:21:25,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:21:25,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:21:25,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:21:25,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:21:25,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:21:25,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:21:25,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:21:25,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:21:25,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:21:25,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:21:25,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:21:25,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:21:25,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:21:25,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:21:25,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:21:25,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:21:25,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:21:25,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:21:25,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:21:25,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:21:25,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:21:25,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:21:25,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:21:25,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:21:25,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:21:25,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:21:25,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:21:25,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:21:25,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:21:25,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:21:25,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:21:25,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:21:25,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:21:25,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:21:25,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:21:25,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:21:25,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:21:25,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:21:25,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:21:25,367 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:21:25,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:21:25,368 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:21:25,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:21:25,369 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:21:25,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:21:25,370 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:21:25,370 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:21:25,370 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:21:25,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:21:25,371 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:21:25,371 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:21:25,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:21:25,372 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:21:25,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:21:25,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:21:25,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:21:25,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:21:25,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:21:25,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:21:25,373 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:21:25,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:21:25,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:21:25,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:21:25,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:21:25,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:21:25,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:21:25,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:21:25,375 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:21:25,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:21:25,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:21:25,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:21:25,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:21:25,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:21:25,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:21:25,376 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_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 [2022-11-20 21:21:25,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:21:25,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:21:25,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:21:25,727 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:21:25,728 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:21:25,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2022-11-20 21:21:28,824 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:21:29,470 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:21:29,471 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2022-11-20 21:21:29,526 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/data/8429dfc1f/87ee8c6f369f469fac9868e9db1dab04/FLAG2521a6793 [2022-11-20 21:21:29,547 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/data/8429dfc1f/87ee8c6f369f469fac9868e9db1dab04 [2022-11-20 21:21:29,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:21:29,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:21:29,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:21:29,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:21:29,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:21:29,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:21:29" (1/1) ... [2022-11-20 21:21:29,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc77b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:29, skipping insertion in model container [2022-11-20 21:21:29,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:21:29" (1/1) ... [2022-11-20 21:21:29,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:21:29,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:21:32,151 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_37755425-4f4b-4121-bc1a-281f034113e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2022-11-20 21:21:32,182 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_37755425-4f4b-4121-bc1a-281f034113e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2022-11-20 21:21:32,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:21:32,530 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:21:33,811 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_37755425-4f4b-4121-bc1a-281f034113e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2022-11-20 21:21:33,818 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_37755425-4f4b-4121-bc1a-281f034113e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2022-11-20 21:21:33,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:21:33,989 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:21:33,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33 WrapperNode [2022-11-20 21:21:33,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:21:33,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:21:33,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:21:33,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:21:34,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,426 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13202 [2022-11-20 21:21:34,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:21:34,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:21:34,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:21:34,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:21:34,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,812 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:34,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:21:35,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:21:35,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:21:35,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:21:35,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (1/1) ... [2022-11-20 21:21:35,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:21:35,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:35,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:21:35,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:21:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:21:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-20 21:21:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-20 21:21:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 21:21:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 21:21:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-20 21:21:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-20 21:21:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-20 21:21:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-20 21:21:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-20 21:21:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-20 21:21:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-20 21:21:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-20 21:21:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-20 21:21:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-20 21:21:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:21:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:21:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:21:35,352 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:21:35,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:21:44,678 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:21:47,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:21:47,138 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 21:21:47,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:21:47 BoogieIcfgContainer [2022-11-20 21:21:47,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:21:47,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:21:47,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:21:47,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:21:47,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:21:29" (1/3) ... [2022-11-20 21:21:47,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec6e859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:21:47, skipping insertion in model container [2022-11-20 21:21:47,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:21:33" (2/3) ... [2022-11-20 21:21:47,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec6e859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:21:47, skipping insertion in model container [2022-11-20 21:21:47,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:21:47" (3/3) ... [2022-11-20 21:21:47,158 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.14.cil.c [2022-11-20 21:21:47,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:21:47,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 21:21:47,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:21:47,294 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;@40a04452, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:21:47,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 21:21:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-20 21:21:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 21:21:47,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:47,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:47,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash 39711144, now seen corresponding path program 1 times [2022-11-20 21:21:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:47,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101696827] [2022-11-20 21:21:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:47,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101696827] [2022-11-20 21:21:47,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101696827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:47,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:47,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:21:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387282253] [2022-11-20 21:21:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:21:48,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:21:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:21:48,049 INFO L87 Difference]: Start difference. First operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 21:21:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:49,339 INFO L93 Difference]: Finished difference Result 3844 states and 7447 transitions. [2022-11-20 21:21:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:21:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-11-20 21:21:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:49,364 INFO L225 Difference]: With dead ends: 3844 [2022-11-20 21:21:49,365 INFO L226 Difference]: Without dead ends: 2006 [2022-11-20 21:21:49,373 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 [2022-11-20 21:21:49,376 INFO L413 NwaCegarLoop]: 3519 mSDtfsCounter, 3787 mSDsluCounter, 3419 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3787 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:49,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3787 Valid, 6938 Invalid, 742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:21:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-11-20 21:21:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 2005. [2022-11-20 21:21:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1941 states have (on average 1.919629057187017) internal successors, (3726), 1945 states have internal predecessors, (3726), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-20 21:21:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3824 transitions. [2022-11-20 21:21:49,544 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3824 transitions. Word has length 68 [2022-11-20 21:21:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:49,545 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 3824 transitions. [2022-11-20 21:21:49,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 21:21:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3824 transitions. [2022-11-20 21:21:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:49,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:49,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:21:49,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 475847100, now seen corresponding path program 1 times [2022-11-20 21:21:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531294109] [2022-11-20 21:21:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:49,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531294109] [2022-11-20 21:21:49,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531294109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:49,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647567964] [2022-11-20 21:21:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:49,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:49,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:49,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:21:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:50,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:21:50,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:50,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647567964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:50,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:21:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908092010] [2022-11-20 21:21:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:50,421 INFO L87 Difference]: Start difference. First operand 2005 states and 3824 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:51,033 INFO L93 Difference]: Finished difference Result 2716 states and 4939 transitions. [2022-11-20 21:21:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:21:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:51,049 INFO L225 Difference]: With dead ends: 2716 [2022-11-20 21:21:51,049 INFO L226 Difference]: Without dead ends: 2357 [2022-11-20 21:21:51,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:51,053 INFO L413 NwaCegarLoop]: 3359 mSDtfsCounter, 3515 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:51,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3592 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:21:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-20 21:21:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2351. [2022-11-20 21:21:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2233 states have (on average 1.8669950738916257) internal successors, (4169), 2238 states have internal predecessors, (4169), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-20 21:21:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 4351 transitions. [2022-11-20 21:21:51,142 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 4351 transitions. Word has length 137 [2022-11-20 21:21:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:51,143 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 4351 transitions. [2022-11-20 21:21:51,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 4351 transitions. [2022-11-20 21:21:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:51,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:51,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:51,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:51,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 504733340, now seen corresponding path program 1 times [2022-11-20 21:21:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820467045] [2022-11-20 21:21:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:51,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820467045] [2022-11-20 21:21:51,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820467045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836718594] [2022-11-20 21:21:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:51,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:51,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:51,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:21:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:51,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 21:21:51,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:51,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836718594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:51,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:51,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:21:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721561918] [2022-11-20 21:21:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:51,938 INFO L87 Difference]: Start difference. First operand 2351 states and 4351 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:52,685 INFO L93 Difference]: Finished difference Result 3748 states and 6538 transitions. [2022-11-20 21:21:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:52,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:21:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:52,701 INFO L225 Difference]: With dead ends: 3748 [2022-11-20 21:21:52,702 INFO L226 Difference]: Without dead ends: 3043 [2022-11-20 21:21:52,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:52,709 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 3527 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:52,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3591 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:21:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-11-20 21:21:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3035. [2022-11-20 21:21:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2811 states have (on average 1.7940234791889007) internal successors, (5043), 2818 states have internal predecessors, (5043), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-20 21:21:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 5389 transitions. [2022-11-20 21:21:52,840 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 5389 transitions. Word has length 137 [2022-11-20 21:21:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:52,840 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 5389 transitions. [2022-11-20 21:21:52,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 5389 transitions. [2022-11-20 21:21:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:52,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:52,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:52,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:21:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:53,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1332614012, now seen corresponding path program 1 times [2022-11-20 21:21:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131568590] [2022-11-20 21:21:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:53,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:53,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131568590] [2022-11-20 21:21:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131568590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260975539] [2022-11-20 21:21:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:53,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:53,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:53,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:53,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:21:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 21:21:53,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:53,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260975539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:53,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:53,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:21:53,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275094398] [2022-11-20 21:21:53,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:53,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:53,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:53,608 INFO L87 Difference]: Start difference. First operand 3035 states and 5389 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:54,234 INFO L93 Difference]: Finished difference Result 5788 states and 9686 transitions. [2022-11-20 21:21:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:21:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:54,257 INFO L225 Difference]: With dead ends: 5788 [2022-11-20 21:21:54,257 INFO L226 Difference]: Without dead ends: 4399 [2022-11-20 21:21:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:54,266 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3536 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:54,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3536 Valid, 3590 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:21:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-11-20 21:21:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 4387. [2022-11-20 21:21:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 3955 states have (on average 1.710998735777497) internal successors, (6767), 3966 states have internal predecessors, (6767), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-20 21:21:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 7433 transitions. [2022-11-20 21:21:54,471 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 7433 transitions. Word has length 137 [2022-11-20 21:21:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:54,472 INFO L495 AbstractCegarLoop]: Abstraction has 4387 states and 7433 transitions. [2022-11-20 21:21:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 7433 transitions. [2022-11-20 21:21:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:54,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:54,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:54,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:54,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:54,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash 681253532, now seen corresponding path program 1 times [2022-11-20 21:21:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681708060] [2022-11-20 21:21:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:54,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:54,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:54,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681708060] [2022-11-20 21:21:54,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681708060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:54,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592296153] [2022-11-20 21:21:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:54,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:54,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:54,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:21:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:21:55,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592296153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:55,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:21:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248022357] [2022-11-20 21:21:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:55,200 INFO L87 Difference]: Start difference. First operand 4387 states and 7433 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:56,012 INFO L93 Difference]: Finished difference Result 9820 states and 15882 transitions. [2022-11-20 21:21:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:56,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:21:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:56,053 INFO L225 Difference]: With dead ends: 9820 [2022-11-20 21:21:56,054 INFO L226 Difference]: Without dead ends: 7079 [2022-11-20 21:21:56,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:56,067 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3533 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:56,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:21:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2022-11-20 21:21:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7059. [2022-11-20 21:21:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 6219 states have (on average 1.6348287506029908) internal successors, (10167), 6238 states have internal predecessors, (10167), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-20 21:21:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 11457 transitions. [2022-11-20 21:21:56,509 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 11457 transitions. Word has length 137 [2022-11-20 21:21:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:56,510 INFO L495 AbstractCegarLoop]: Abstraction has 7059 states and 11457 transitions. [2022-11-20 21:21:56,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 11457 transitions. [2022-11-20 21:21:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:56,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:56,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:56,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:56,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1807718532, now seen corresponding path program 1 times [2022-11-20 21:21:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144572332] [2022-11-20 21:21:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:56,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144572332] [2022-11-20 21:21:56,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144572332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74289771] [2022-11-20 21:21:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:56,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:57,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:21:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:21:57,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:57,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74289771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:57,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:21:57,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566539139] [2022-11-20 21:21:57,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:57,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:57,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:57,349 INFO L87 Difference]: Start difference. First operand 7059 states and 11457 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:58,417 INFO L93 Difference]: Finished difference Result 17788 states and 28074 transitions. [2022-11-20 21:21:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:21:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:58,503 INFO L225 Difference]: With dead ends: 17788 [2022-11-20 21:21:58,503 INFO L226 Difference]: Without dead ends: 12375 [2022-11-20 21:21:58,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:58,531 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3506 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:58,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:21:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2022-11-20 21:21:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12339. [2022-11-20 21:21:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12339 states, 10699 states have (on average 1.5768763435835125) internal successors, (16871), 10734 states have internal predecessors, (16871), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-20 21:21:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12339 states to 12339 states and 19377 transitions. [2022-11-20 21:21:59,258 INFO L78 Accepts]: Start accepts. Automaton has 12339 states and 19377 transitions. Word has length 137 [2022-11-20 21:21:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:59,259 INFO L495 AbstractCegarLoop]: Abstraction has 12339 states and 19377 transitions. [2022-11-20 21:21:59,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:21:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12339 states and 19377 transitions. [2022-11-20 21:21:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:21:59,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:59,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:21:59,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 21:21:59,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 873244316, now seen corresponding path program 1 times [2022-11-20 21:21:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973792008] [2022-11-20 21:21:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:21:59,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973792008] [2022-11-20 21:21:59,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973792008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652230262] [2022-11-20 21:21:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:59,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:59,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:59,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:21:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:22:00,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:22:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652230262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:00,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:22:00,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:22:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591103064] [2022-11-20 21:22:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:22:00,045 INFO L87 Difference]: Start difference. First operand 12339 states and 19377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:22:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:01,365 INFO L93 Difference]: Finished difference Result 33532 states and 52058 transitions. [2022-11-20 21:22:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:22:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:01,460 INFO L225 Difference]: With dead ends: 33532 [2022-11-20 21:22:01,460 INFO L226 Difference]: Without dead ends: 22839 [2022-11-20 21:22:01,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:22:01,497 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3509 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:01,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:22:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22839 states. [2022-11-20 21:22:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22839 to 22771. [2022-11-20 21:22:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22771 states, 19563 states have (on average 1.537954301487502) internal successors, (30087), 19630 states have internal predecessors, (30087), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-20 21:22:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22771 states to 22771 states and 34961 transitions. [2022-11-20 21:22:02,543 INFO L78 Accepts]: Start accepts. Automaton has 22771 states and 34961 transitions. Word has length 137 [2022-11-20 21:22:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:02,544 INFO L495 AbstractCegarLoop]: Abstraction has 22771 states and 34961 transitions. [2022-11-20 21:22:02,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:22:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22771 states and 34961 transitions. [2022-11-20 21:22:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:22:02,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:02,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:22:02,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:22:02,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 225612668, now seen corresponding path program 1 times [2022-11-20 21:22:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819323151] [2022-11-20 21:22:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:22:03,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:03,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819323151] [2022-11-20 21:22:03,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819323151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:03,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305810274] [2022-11-20 21:22:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:03,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:03,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:22:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:22:03,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:22:03,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:22:03,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305810274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:03,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:22:03,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:22:03,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65106630] [2022-11-20 21:22:03,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:03,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:22:03,355 INFO L87 Difference]: Start difference. First operand 22771 states and 34961 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:22:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:05,073 INFO L93 Difference]: Finished difference Result 64636 states and 99226 transitions. [2022-11-20 21:22:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-20 21:22:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:05,446 INFO L225 Difference]: With dead ends: 64636 [2022-11-20 21:22:05,447 INFO L226 Difference]: Without dead ends: 43511 [2022-11-20 21:22:05,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:22:05,521 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3521 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:22:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43511 states. [2022-11-20 21:22:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43511 to 43379. [2022-11-20 21:22:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43379 states, 37099 states have (on average 1.5131135610124262) internal successors, (56135), 37230 states have internal predecessors, (56135), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-20 21:22:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43379 states to 43379 states and 65617 transitions. [2022-11-20 21:22:07,799 INFO L78 Accepts]: Start accepts. Automaton has 43379 states and 65617 transitions. Word has length 137 [2022-11-20 21:22:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:07,799 INFO L495 AbstractCegarLoop]: Abstraction has 43379 states and 65617 transitions. [2022-11-20 21:22:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:22:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 43379 states and 65617 transitions. [2022-11-20 21:22:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:22:07,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:07,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:22:07,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:08,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:08,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1945907292, now seen corresponding path program 1 times [2022-11-20 21:22:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:08,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398465922] [2022-11-20 21:22:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 21:22:09,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:09,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398465922] [2022-11-20 21:22:09,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398465922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:09,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:22:09,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:22:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875532846] [2022-11-20 21:22:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:09,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:22:09,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:22:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:22:09,337 INFO L87 Difference]: Start difference. First operand 43379 states and 65617 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:22:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:15,620 INFO L93 Difference]: Finished difference Result 147579 states and 220888 transitions. [2022-11-20 21:22:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:22:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-11-20 21:22:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:16,337 INFO L225 Difference]: With dead ends: 147579 [2022-11-20 21:22:16,338 INFO L226 Difference]: Without dead ends: 105847 [2022-11-20 21:22:16,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:22:16,491 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 4355 mSDsluCounter, 9773 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4376 SdHoareTripleChecker+Valid, 13091 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:16,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4376 Valid, 13091 Invalid, 1379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [153 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:22:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105847 states. [2022-11-20 21:22:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105847 to 83571. [2022-11-20 21:22:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83571 states, 71275 states have (on average 1.4969484391441599) internal successors, (106695), 71534 states have internal predecessors, (106695), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-20 21:22:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83571 states to 83571 states and 125137 transitions. [2022-11-20 21:22:21,774 INFO L78 Accepts]: Start accepts. Automaton has 83571 states and 125137 transitions. Word has length 137 [2022-11-20 21:22:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:21,776 INFO L495 AbstractCegarLoop]: Abstraction has 83571 states and 125137 transitions. [2022-11-20 21:22:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:22:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 83571 states and 125137 transitions. [2022-11-20 21:22:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 21:22:21,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:21,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:22:21,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:22:21,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash -406462274, now seen corresponding path program 1 times [2022-11-20 21:22:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831286911] [2022-11-20 21:22:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:22:22,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831286911] [2022-11-20 21:22:22,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831286911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288781405] [2022-11-20 21:22:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:22,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:22,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:22,348 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:22:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:22:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 21:22:22,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:22:22,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288781405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:22,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:22:22,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:22:22,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366586752] [2022-11-20 21:22:22,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:22:22,675 INFO L87 Difference]: Start difference. First operand 83571 states and 125137 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:22:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:27,870 INFO L93 Difference]: Finished difference Result 147191 states and 223572 transitions. [2022-11-20 21:22:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:22:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 159 [2022-11-20 21:22:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:28,656 INFO L225 Difference]: With dead ends: 147191 [2022-11-20 21:22:28,657 INFO L226 Difference]: Without dead ends: 105203 [2022-11-20 21:22:28,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:22:28,805 INFO L413 NwaCegarLoop]: 3428 mSDtfsCounter, 125 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6738 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:28,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6738 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:22:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105203 states. [2022-11-20 21:22:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105203 to 99315. [2022-11-20 21:22:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99315 states, 86507 states have (on average 1.5381761013559596) internal successors, (133063), 86766 states have internal predecessors, (133063), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2022-11-20 21:22:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99315 states to 99315 states and 152017 transitions. [2022-11-20 21:22:34,341 INFO L78 Accepts]: Start accepts. Automaton has 99315 states and 152017 transitions. Word has length 159 [2022-11-20 21:22:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:34,342 INFO L495 AbstractCegarLoop]: Abstraction has 99315 states and 152017 transitions. [2022-11-20 21:22:34,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:22:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 99315 states and 152017 transitions. [2022-11-20 21:22:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-20 21:22:34,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:34,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:34,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:22:34,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:22:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -712023823, now seen corresponding path program 1 times [2022-11-20 21:22:34,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:22:34,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705043345] [2022-11-20 21:22:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:22:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 21:22:35,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:22:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705043345] [2022-11-20 21:22:35,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705043345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595207453] [2022-11-20 21:22:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:35,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:35,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:35,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37755425-4f4b-4121-bc1a-281f034113e6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:22:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:22:35,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 21:22:36,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:22:36,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595207453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:36,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:22:36,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-20 21:22:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114984051] [2022-11-20 21:22:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:22:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:22:36,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:22:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:22:36,216 INFO L87 Difference]: Start difference. First operand 99315 states and 152017 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)