./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0 --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 b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 --- 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-e04fb08 [2022-11-16 16:27:22,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:27:22,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:27:22,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:27:22,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:27:22,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:27:22,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:27:22,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:27:22,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:27:22,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:27:22,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:27:22,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:27:22,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:27:22,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:27:22,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:27:22,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:27:22,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:27:22,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:27:22,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:27:22,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:27:22,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:27:22,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:27:22,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:27:22,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:27:22,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:27:22,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:27:22,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:27:22,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:27:22,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:27:22,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:27:22,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:27:22,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:27:22,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:27:22,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:27:22,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:27:22,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:27:22,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:27:22,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:27:22,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:27:22,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:27:22,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:27:22,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:27:22,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:27:22,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:27:22,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:27:22,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:27:22,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:27:22,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:27:22,374 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:27:22,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:27:22,374 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:27:22,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:27:22,374 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:27:22,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:27:22,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:27:22,377 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:27:22,378 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:27:22,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:27:22,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:27:22,378 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:27:22,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:27:22,379 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:27:22,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:27:22,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:27:22,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:27:22,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:27:22,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:27:22,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:27:22,382 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:27:22,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:27:22,383 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:27:22,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:27:22,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:27:22,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:27:22,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:27:22,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:27:22,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:27:22,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:27:22,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:27:22,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:27:22,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:27:22,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:27:22,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:27:22,386 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_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 [2022-11-16 16:27:22,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:27:22,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:27:22,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:27:22,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:27:22,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:27:22,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2022-11-16 16:27:22,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/data/111b963e4/cbc03fe49ebb46528ec4e5e701463bff/FLAG30704bdea [2022-11-16 16:27:23,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:27:23,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2022-11-16 16:27:23,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/data/111b963e4/cbc03fe49ebb46528ec4e5e701463bff/FLAG30704bdea [2022-11-16 16:27:23,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/data/111b963e4/cbc03fe49ebb46528ec4e5e701463bff [2022-11-16 16:27:23,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:27:23,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:27:23,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:27:23,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:27:23,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:27:23,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:27:23" (1/1) ... [2022-11-16 16:27:23,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5810b87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:23, skipping insertion in model container [2022-11-16 16:27:23,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:27:23" (1/1) ... [2022-11-16 16:27:23,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:27:23,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:27:23,941 WARN L229 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_b7fb862b-4f03-41fd-8604-d71c43217e45/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2022-11-16 16:27:23,981 WARN L229 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_b7fb862b-4f03-41fd-8604-d71c43217e45/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2022-11-16 16:27:24,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:27:24,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:27:24,077 WARN L229 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_b7fb862b-4f03-41fd-8604-d71c43217e45/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2022-11-16 16:27:24,114 WARN L229 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_b7fb862b-4f03-41fd-8604-d71c43217e45/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2022-11-16 16:27:24,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:27:24,208 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:27:24,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24 WrapperNode [2022-11-16 16:27:24,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:27:24,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:27:24,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:27:24,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:27:24,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,305 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 649 [2022-11-16 16:27:24,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:27:24,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:27:24,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:27:24,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:27:24,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:27:24,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:27:24,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:27:24,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:27:24,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (1/1) ... [2022-11-16 16:27:24,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:27:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:24,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:27:24,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:27:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:27:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 16:27:24,478 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 16:27:24,478 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-16 16:27:24,478 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-16 16:27:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 16:27:24,479 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 16:27:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 16:27:24,479 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 16:27:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 16:27:24,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 16:27:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 16:27:24,480 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 16:27:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 16:27:24,480 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 16:27:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:27:24,480 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 16:27:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 16:27:24,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:27:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:27:24,481 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 16:27:24,481 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 16:27:24,594 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:27:24,596 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:27:25,425 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:27:25,745 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:27:25,746 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-16 16:27:25,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:27:25 BoogieIcfgContainer [2022-11-16 16:27:25,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:27:25,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:27:25,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:27:25,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:27:25,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:27:23" (1/3) ... [2022-11-16 16:27:25,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9b2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:27:25, skipping insertion in model container [2022-11-16 16:27:25,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:27:24" (2/3) ... [2022-11-16 16:27:25,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9b2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:27:25, skipping insertion in model container [2022-11-16 16:27:25,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:27:25" (3/3) ... [2022-11-16 16:27:25,762 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2022-11-16 16:27:25,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:27:25,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 16:27:25,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:27:25,880 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;@17574914, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:27:25,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 16:27:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 125 states have (on average 1.544) internal successors, (193), 130 states have internal predecessors, (193), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-16 16:27:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 16:27:25,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:25,898 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] [2022-11-16 16:27:25,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1072827931, now seen corresponding path program 1 times [2022-11-16 16:27:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45677642] [2022-11-16 16:27:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:25,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:26,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:26,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45677642] [2022-11-16 16:27:26,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45677642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:26,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:26,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052183212] [2022-11-16 16:27:26,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:26,387 INFO L87 Difference]: Start difference. First operand has 162 states, 125 states have (on average 1.544) internal successors, (193), 130 states have internal predecessors, (193), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:26,615 INFO L93 Difference]: Finished difference Result 357 states and 534 transitions. [2022-11-16 16:27:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-16 16:27:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:26,628 INFO L225 Difference]: With dead ends: 357 [2022-11-16 16:27:26,629 INFO L226 Difference]: Without dead ends: 195 [2022-11-16 16:27:26,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:26,636 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 210 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:26,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 263 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-16 16:27:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2022-11-16 16:27:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.4569536423841059) internal successors, (220), 154 states have internal predecessors, (220), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-16 16:27:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 274 transitions. [2022-11-16 16:27:26,729 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 274 transitions. Word has length 28 [2022-11-16 16:27:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:26,731 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 274 transitions. [2022-11-16 16:27:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 274 transitions. [2022-11-16 16:27:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:27:26,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:26,738 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] [2022-11-16 16:27:26,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:27:26,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1924828811, now seen corresponding path program 1 times [2022-11-16 16:27:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:26,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271170448] [2022-11-16 16:27:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:26,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271170448] [2022-11-16 16:27:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271170448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:26,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:26,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:26,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930607600] [2022-11-16 16:27:26,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:26,851 INFO L87 Difference]: Start difference. First operand 191 states and 274 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:26,985 INFO L93 Difference]: Finished difference Result 347 states and 491 transitions. [2022-11-16 16:27:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-16 16:27:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:26,997 INFO L225 Difference]: With dead ends: 347 [2022-11-16 16:27:26,998 INFO L226 Difference]: Without dead ends: 266 [2022-11-16 16:27:27,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:27,003 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 208 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:27,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 248 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-16 16:27:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2022-11-16 16:27:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 211 states have (on average 1.4265402843601895) internal successors, (301), 214 states have internal predecessors, (301), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-16 16:27:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 369 transitions. [2022-11-16 16:27:27,047 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 369 transitions. Word has length 29 [2022-11-16 16:27:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:27,047 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 369 transitions. [2022-11-16 16:27:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 369 transitions. [2022-11-16 16:27:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 16:27:27,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:27,055 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] [2022-11-16 16:27:27,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:27:27,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash 256071602, now seen corresponding path program 1 times [2022-11-16 16:27:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:27,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043484507] [2022-11-16 16:27:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:27,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043484507] [2022-11-16 16:27:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043484507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:27,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773000154] [2022-11-16 16:27:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:27,159 INFO L87 Difference]: Start difference. First operand 262 states and 369 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:27,299 INFO L93 Difference]: Finished difference Result 502 states and 697 transitions. [2022-11-16 16:27:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-16 16:27:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:27,304 INFO L225 Difference]: With dead ends: 502 [2022-11-16 16:27:27,304 INFO L226 Difference]: Without dead ends: 350 [2022-11-16 16:27:27,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:27,308 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 46 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:27,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 381 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-16 16:27:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 336. [2022-11-16 16:27:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 274 states have (on average 1.4087591240875912) internal successors, (386), 279 states have internal predecessors, (386), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-16 16:27:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 466 transitions. [2022-11-16 16:27:27,350 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 466 transitions. Word has length 30 [2022-11-16 16:27:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:27,350 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 466 transitions. [2022-11-16 16:27:27,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 16:27:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 466 transitions. [2022-11-16 16:27:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 16:27:27,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:27,352 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:27:27,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:27:27,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 245396795, now seen corresponding path program 1 times [2022-11-16 16:27:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782250577] [2022-11-16 16:27:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:27:27,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:27,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782250577] [2022-11-16 16:27:27,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782250577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:27,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:27,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243087645] [2022-11-16 16:27:27,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:27,425 INFO L87 Difference]: Start difference. First operand 336 states and 466 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:27:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:27,521 INFO L93 Difference]: Finished difference Result 499 states and 684 transitions. [2022-11-16 16:27:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-16 16:27:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:27,525 INFO L225 Difference]: With dead ends: 499 [2022-11-16 16:27:27,525 INFO L226 Difference]: Without dead ends: 341 [2022-11-16 16:27:27,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:27,527 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 32 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:27,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 413 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-16 16:27:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 330. [2022-11-16 16:27:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 268 states have (on average 1.3880597014925373) internal successors, (372), 273 states have internal predecessors, (372), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-16 16:27:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 452 transitions. [2022-11-16 16:27:27,552 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 452 transitions. Word has length 43 [2022-11-16 16:27:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:27,552 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 452 transitions. [2022-11-16 16:27:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:27:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 452 transitions. [2022-11-16 16:27:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 16:27:27,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:27,554 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] [2022-11-16 16:27:27,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:27:27,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash 167224254, now seen corresponding path program 1 times [2022-11-16 16:27:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:27,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334717116] [2022-11-16 16:27:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:27,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334717116] [2022-11-16 16:27:27,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334717116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:27,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:27,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:27:27,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048111573] [2022-11-16 16:27:27,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:27:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:27:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:27:27,671 INFO L87 Difference]: Start difference. First operand 330 states and 452 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 16:27:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:28,458 INFO L93 Difference]: Finished difference Result 823 states and 1232 transitions. [2022-11-16 16:27:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:27:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-16 16:27:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:28,468 INFO L225 Difference]: With dead ends: 823 [2022-11-16 16:27:28,468 INFO L226 Difference]: Without dead ends: 719 [2022-11-16 16:27:28,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:27:28,471 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 783 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:28,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 799 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:27:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-16 16:27:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 708. [2022-11-16 16:27:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 565 states have (on average 1.4265486725663716) internal successors, (806), 573 states have internal predecessors, (806), 98 states have call successors, (98), 44 states have call predecessors, (98), 43 states have return successors, (130), 91 states have call predecessors, (130), 96 states have call successors, (130) [2022-11-16 16:27:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1034 transitions. [2022-11-16 16:27:28,563 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1034 transitions. Word has length 46 [2022-11-16 16:27:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:28,565 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1034 transitions. [2022-11-16 16:27:28,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 16:27:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1034 transitions. [2022-11-16 16:27:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 16:27:28,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:28,570 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:27:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:27:28,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 293317167, now seen corresponding path program 1 times [2022-11-16 16:27:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:28,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110238356] [2022-11-16 16:27:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:28,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:27:28,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110238356] [2022-11-16 16:27:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110238356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:28,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:28,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448777839] [2022-11-16 16:27:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:28,652 INFO L87 Difference]: Start difference. First operand 708 states and 1034 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:27:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:28,788 INFO L93 Difference]: Finished difference Result 957 states and 1358 transitions. [2022-11-16 16:27:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-16 16:27:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:28,792 INFO L225 Difference]: With dead ends: 957 [2022-11-16 16:27:28,793 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 16:27:28,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:28,794 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 194 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:28,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 246 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 16:27:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-16 16:27:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 604 states have (on average 1.4056291390728477) internal successors, (849), 612 states have internal predecessors, (849), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2022-11-16 16:27:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1085 transitions. [2022-11-16 16:27:28,863 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1085 transitions. Word has length 46 [2022-11-16 16:27:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:28,864 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1085 transitions. [2022-11-16 16:27:28,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:27:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1085 transitions. [2022-11-16 16:27:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 16:27:28,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:28,866 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:27:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 16:27:28,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1868343555, now seen corresponding path program 1 times [2022-11-16 16:27:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:28,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278951190] [2022-11-16 16:27:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:27:28,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:28,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278951190] [2022-11-16 16:27:28,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278951190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:28,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:28,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:27:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603488686] [2022-11-16 16:27:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:27:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:27:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:28,948 INFO L87 Difference]: Start difference. First operand 754 states and 1085 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:27:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:29,219 INFO L93 Difference]: Finished difference Result 794 states and 1132 transitions. [2022-11-16 16:27:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:27:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-16 16:27:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:29,224 INFO L225 Difference]: With dead ends: 794 [2022-11-16 16:27:29,225 INFO L226 Difference]: Without dead ends: 791 [2022-11-16 16:27:29,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:27:29,226 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 360 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:29,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 244 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:27:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-16 16:27:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 753. [2022-11-16 16:27:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 604 states have (on average 1.4023178807947019) internal successors, (847), 611 states have internal predecessors, (847), 101 states have call successors, (101), 47 states have call predecessors, (101), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2022-11-16 16:27:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1082 transitions. [2022-11-16 16:27:29,327 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1082 transitions. Word has length 47 [2022-11-16 16:27:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:29,328 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1082 transitions. [2022-11-16 16:27:29,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:27:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1082 transitions. [2022-11-16 16:27:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 16:27:29,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:29,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:29,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 16:27:29,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:27:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2084954894, now seen corresponding path program 1 times [2022-11-16 16:27:29,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:27:29,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800815079] [2022-11-16 16:27:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:29,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:27:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:27:29,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:27:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800815079] [2022-11-16 16:27:29,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800815079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:27:29,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888809038] [2022-11-16 16:27:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:29,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:29,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:29,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:29,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:27:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:27:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:30,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:27:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888809038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183835913] [2022-11-16 16:27:30,296 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-16 16:27:30,296 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:27:30,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:27:30,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:27:30,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:27:33,829 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 130 for LOIs [2022-11-16 16:27:33,849 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 275 for LOIs [2022-11-16 16:27:35,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:27:55,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [183835913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:55,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:27:55,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [5, 5, 4] total 33 [2022-11-16 16:27:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456243134] [2022-11-16 16:27:55,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:55,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 16:27:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 16:27:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 16:27:55,171 INFO L87 Difference]: Start difference. First operand 753 states and 1082 transitions. Second operand has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:28:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:11,599 INFO L93 Difference]: Finished difference Result 1059 states and 1472 transitions. [2022-11-16 16:28:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 16:28:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-11-16 16:28:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:11,604 INFO L225 Difference]: With dead ends: 1059 [2022-11-16 16:28:11,604 INFO L226 Difference]: Without dead ends: 794 [2022-11-16 16:28:11,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:28:11,606 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 46 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 3231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:11,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1622 Invalid, 3231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 3211 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 16:28:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-16 16:28:11,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 781. [2022-11-16 16:28:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 629 states have (on average 1.3879173290937996) internal successors, (873), 636 states have internal predecessors, (873), 102 states have call successors, (102), 49 states have call predecessors, (102), 48 states have return successors, (135), 96 states have call predecessors, (135), 101 states have call successors, (135) [2022-11-16 16:28:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1110 transitions. [2022-11-16 16:28:11,678 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1110 transitions. Word has length 48 [2022-11-16 16:28:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:11,678 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1110 transitions. [2022-11-16 16:28:11,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:28:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1110 transitions. [2022-11-16 16:28:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 16:28:11,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:11,680 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:28:11,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 16:28:11,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 16:28:11,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:28:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1539440220, now seen corresponding path program 1 times [2022-11-16 16:28:11,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:28:11,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763735103] [2022-11-16 16:28:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:28:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:28:12,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:28:12,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763735103] [2022-11-16 16:28:12,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763735103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:28:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129427821] [2022-11-16 16:28:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:12,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:28:12,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:28:12,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:28:12,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:28:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:28:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:12,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:28:12,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129427821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:12,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080207058] [2022-11-16 16:28:12,496 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-16 16:28:12,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:28:12,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:28:12,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:28:12,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:28:18,515 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 149 for LOIs [2022-11-16 16:28:18,553 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 275 for LOIs [2022-11-16 16:28:21,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:28:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2080207058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:28:51,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [5, 5, 4] total 37 [2022-11-16 16:28:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895883542] [2022-11-16 16:28:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:51,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 16:28:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:28:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 16:28:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:28:51,645 INFO L87 Difference]: Start difference. First operand 781 states and 1110 transitions. Second operand has 29 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:29:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:10,545 INFO L93 Difference]: Finished difference Result 1100 states and 1525 transitions. [2022-11-16 16:29:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 16:29:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-11-16 16:29:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:10,550 INFO L225 Difference]: With dead ends: 1100 [2022-11-16 16:29:10,550 INFO L226 Difference]: Without dead ends: 872 [2022-11-16 16:29:10,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 16:29:10,552 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 79 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 3295 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 3328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:10,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1601 Invalid, 3328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3295 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-16 16:29:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-16 16:29:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 822. [2022-11-16 16:29:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 662 states have (on average 1.3851963746223566) internal successors, (917), 669 states have internal predecessors, (917), 108 states have call successors, (108), 51 states have call predecessors, (108), 50 states have return successors, (141), 102 states have call predecessors, (141), 107 states have call successors, (141) [2022-11-16 16:29:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1166 transitions. [2022-11-16 16:29:10,657 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1166 transitions. Word has length 56 [2022-11-16 16:29:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:10,657 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1166 transitions. [2022-11-16 16:29:10,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:29:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1166 transitions. [2022-11-16 16:29:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 16:29:10,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:10,659 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:29:10,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 16:29:10,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 16:29:10,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:29:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1076505754, now seen corresponding path program 1 times [2022-11-16 16:29:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:10,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887709306] [2022-11-16 16:29:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 16:29:10,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887709306] [2022-11-16 16:29:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887709306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545808724] [2022-11-16 16:29:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:10,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:10,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:10,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:10,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:29:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:29:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:11,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:29:11,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545808724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:11,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:29:11,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 16:29:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726587670] [2022-11-16 16:29:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:11,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:29:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:29:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:29:11,135 INFO L87 Difference]: Start difference. First operand 822 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:29:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:11,296 INFO L93 Difference]: Finished difference Result 1020 states and 1413 transitions. [2022-11-16 16:29:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:29:11,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2022-11-16 16:29:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:11,303 INFO L225 Difference]: With dead ends: 1020 [2022-11-16 16:29:11,303 INFO L226 Difference]: Without dead ends: 701 [2022-11-16 16:29:11,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:29:11,305 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 27 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:11,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 392 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:29:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-16 16:29:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2022-11-16 16:29:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 559 states have (on average 1.3864042933810377) internal successors, (775), 565 states have internal predecessors, (775), 97 states have call successors, (97), 44 states have call predecessors, (97), 43 states have return successors, (130), 92 states have call predecessors, (130), 96 states have call successors, (130) [2022-11-16 16:29:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1002 transitions. [2022-11-16 16:29:11,395 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1002 transitions. Word has length 57 [2022-11-16 16:29:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:11,395 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 1002 transitions. [2022-11-16 16:29:11,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:29:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1002 transitions. [2022-11-16 16:29:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 16:29:11,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:11,397 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:29:11,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:11,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 16:29:11,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:29:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash -799687255, now seen corresponding path program 1 times [2022-11-16 16:29:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:11,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177625172] [2022-11-16 16:29:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:11,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:29:11,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177625172] [2022-11-16 16:29:11,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177625172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270649161] [2022-11-16 16:29:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:11,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:11,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:11,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:29:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:29:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:29:12,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:29:12,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270649161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904437157] [2022-11-16 16:29:12,273 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-16 16:29:12,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:29:12,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:29:12,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:29:12,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:29:19,652 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2022-11-16 16:29:19,715 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 221 for LOIs [2022-11-16 16:29:22,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:29:51,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1904437157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:29:51,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:29:51,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [5, 5, 4] total 33 [2022-11-16 16:29:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377391407] [2022-11-16 16:29:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:29:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 16:29:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:29:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 16:29:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 16:29:51,777 INFO L87 Difference]: Start difference. First operand 701 states and 1002 transitions. Second operand has 28 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:30:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:08,520 INFO L93 Difference]: Finished difference Result 849 states and 1186 transitions. [2022-11-16 16:30:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 16:30:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-11-16 16:30:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:08,525 INFO L225 Difference]: With dead ends: 849 [2022-11-16 16:30:08,525 INFO L226 Difference]: Without dead ends: 719 [2022-11-16 16:30:08,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 16:30:08,527 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 52 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:08,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1659 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 16:30:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-16 16:30:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 695. [2022-11-16 16:30:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 554 states have (on average 1.3844765342960288) internal successors, (767), 560 states have internal predecessors, (767), 96 states have call successors, (96), 44 states have call predecessors, (96), 43 states have return successors, (129), 91 states have call predecessors, (129), 95 states have call successors, (129) [2022-11-16 16:30:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 992 transitions. [2022-11-16 16:30:08,631 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 992 transitions. Word has length 57 [2022-11-16 16:30:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:08,632 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 992 transitions. [2022-11-16 16:30:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 16:30:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 992 transitions. [2022-11-16 16:30:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 16:30:08,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:08,635 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:30:08,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:08,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:30:08,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:30:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1371328757, now seen corresponding path program 1 times [2022-11-16 16:30:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:30:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268731029] [2022-11-16 16:30:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:30:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:30:08,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:30:08,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268731029] [2022-11-16 16:30:08,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268731029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:30:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461872954] [2022-11-16 16:30:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:08,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:30:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:30:08,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:30:08,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:30:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:30:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:30:09,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461872954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:09,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:30:09,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-16 16:30:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059376315] [2022-11-16 16:30:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:09,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:30:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:30:09,072 INFO L87 Difference]: Start difference. First operand 695 states and 992 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:30:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:09,256 INFO L93 Difference]: Finished difference Result 816 states and 1144 transitions. [2022-11-16 16:30:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-16 16:30:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:09,261 INFO L225 Difference]: With dead ends: 816 [2022-11-16 16:30:09,261 INFO L226 Difference]: Without dead ends: 701 [2022-11-16 16:30:09,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:30:09,262 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 40 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:09,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 403 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:30:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-16 16:30:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 693. [2022-11-16 16:30:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 552 states have (on average 1.3768115942028984) internal successors, (760), 558 states have internal predecessors, (760), 96 states have call successors, (96), 44 states have call predecessors, (96), 43 states have return successors, (129), 91 states have call predecessors, (129), 95 states have call successors, (129) [2022-11-16 16:30:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 985 transitions. [2022-11-16 16:30:09,370 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 985 transitions. Word has length 61 [2022-11-16 16:30:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:09,371 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 985 transitions. [2022-11-16 16:30:09,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:30:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 985 transitions. [2022-11-16 16:30:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 16:30:09,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:09,373 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:30:09,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:09,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:30:09,580 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:30:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1798459191, now seen corresponding path program 1 times [2022-11-16 16:30:09,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:30:09,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497203761] [2022-11-16 16:30:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:30:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:30:09,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:30:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497203761] [2022-11-16 16:30:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497203761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:09,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:30:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:30:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476067626] [2022-11-16 16:30:09,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:09,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:30:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:30:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:30:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:30:09,675 INFO L87 Difference]: Start difference. First operand 693 states and 985 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:30:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:09,853 INFO L93 Difference]: Finished difference Result 791 states and 1107 transitions. [2022-11-16 16:30:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:30:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-11-16 16:30:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:09,858 INFO L225 Difference]: With dead ends: 791 [2022-11-16 16:30:09,858 INFO L226 Difference]: Without dead ends: 691 [2022-11-16 16:30:09,859 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 [2022-11-16 16:30:09,861 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 61 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:09,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 517 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:30:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-16 16:30:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2022-11-16 16:30:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 550 states have (on average 1.3727272727272728) internal successors, (755), 556 states have internal predecessors, (755), 96 states have call successors, (96), 44 states have call predecessors, (96), 43 states have return successors, (129), 91 states have call predecessors, (129), 95 states have call successors, (129) [2022-11-16 16:30:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 980 transitions. [2022-11-16 16:30:09,955 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 980 transitions. Word has length 61 [2022-11-16 16:30:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:09,956 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 980 transitions. [2022-11-16 16:30:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 16:30:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 980 transitions. [2022-11-16 16:30:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 16:30:09,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:09,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 16:30:09,962 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:30:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash -993716986, now seen corresponding path program 1 times [2022-11-16 16:30:09,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:30:09,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157454565] [2022-11-16 16:30:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:09,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:30:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:30:10,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:30:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157454565] [2022-11-16 16:30:10,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157454565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:30:10,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345345239] [2022-11-16 16:30:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:30:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:30:10,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:30:10,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:30:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:30:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:30:10,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:30:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345345239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362496445] [2022-11-16 16:30:10,676 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-16 16:30:10,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:30:10,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:30:10,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:30:10,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:30:27,360 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-16 16:30:27,401 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 139 for LOIs [2022-11-16 16:30:27,432 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 185 for LOIs [2022-11-16 16:30:27,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:31:03,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27452#(and (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 16:31:03,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:31:03,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:31:03,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 16:31:03,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075278844] [2022-11-16 16:31:03,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:31:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:31:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:31:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:31:03,979 INFO L87 Difference]: Start difference. First operand 691 states and 980 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:31:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:04,446 INFO L93 Difference]: Finished difference Result 914 states and 1239 transitions. [2022-11-16 16:31:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:31:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 62 [2022-11-16 16:31:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:04,454 INFO L225 Difference]: With dead ends: 914 [2022-11-16 16:31:04,454 INFO L226 Difference]: Without dead ends: 911 [2022-11-16 16:31:04,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:31:04,457 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 434 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:04,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 812 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:31:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-11-16 16:31:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 794. [2022-11-16 16:31:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 636 states have (on average 1.3474842767295598) internal successors, (857), 644 states have internal predecessors, (857), 106 states have call successors, (106), 51 states have call predecessors, (106), 50 states have return successors, (139), 99 states have call predecessors, (139), 105 states have call successors, (139) [2022-11-16 16:31:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1102 transitions. [2022-11-16 16:31:04,581 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1102 transitions. Word has length 62 [2022-11-16 16:31:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:04,581 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1102 transitions. [2022-11-16 16:31:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:31:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1102 transitions. [2022-11-16 16:31:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 16:31:04,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:04,584 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:31:04,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:04,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 16:31:04,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1892650253, now seen corresponding path program 2 times [2022-11-16 16:31:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945376520] [2022-11-16 16:31:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:31:04,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:04,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945376520] [2022-11-16 16:31:04,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945376520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:04,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:04,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:31:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647936361] [2022-11-16 16:31:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:04,844 INFO L87 Difference]: Start difference. First operand 794 states and 1102 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:31:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:05,010 INFO L93 Difference]: Finished difference Result 911 states and 1238 transitions. [2022-11-16 16:31:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 75 [2022-11-16 16:31:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:05,014 INFO L225 Difference]: With dead ends: 911 [2022-11-16 16:31:05,014 INFO L226 Difference]: Without dead ends: 488 [2022-11-16 16:31:05,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:05,015 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 198 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:05,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 246 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-16 16:31:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-11-16 16:31:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 381 states have (on average 1.4619422572178478) internal successors, (557), 385 states have internal predecessors, (557), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2022-11-16 16:31:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 743 transitions. [2022-11-16 16:31:05,060 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 743 transitions. Word has length 75 [2022-11-16 16:31:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:05,061 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 743 transitions. [2022-11-16 16:31:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 16:31:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 743 transitions. [2022-11-16 16:31:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 16:31:05,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:05,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 16:31:05,064 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -484150846, now seen corresponding path program 1 times [2022-11-16 16:31:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:05,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639293068] [2022-11-16 16:31:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:31:05,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639293068] [2022-11-16 16:31:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639293068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941583588] [2022-11-16 16:31:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:05,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:05,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:05,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:31:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:31:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:31:05,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:05,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941583588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:05,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:05,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:31:05,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278675790] [2022-11-16 16:31:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:05,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:05,403 INFO L87 Difference]: Start difference. First operand 488 states and 743 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:31:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:05,582 INFO L93 Difference]: Finished difference Result 1436 states and 2248 transitions. [2022-11-16 16:31:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-16 16:31:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:05,588 INFO L225 Difference]: With dead ends: 1436 [2022-11-16 16:31:05,589 INFO L226 Difference]: Without dead ends: 954 [2022-11-16 16:31:05,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:05,593 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:05,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-16 16:31:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 947. [2022-11-16 16:31:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 743 states have (on average 1.4535666218034993) internal successors, (1080), 750 states have internal predecessors, (1080), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2022-11-16 16:31:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1430 transitions. [2022-11-16 16:31:05,693 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1430 transitions. Word has length 87 [2022-11-16 16:31:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:05,694 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1430 transitions. [2022-11-16 16:31:05,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:31:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1430 transitions. [2022-11-16 16:31:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 16:31:05,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:05,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:05,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 16:31:05,903 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1513222716, now seen corresponding path program 1 times [2022-11-16 16:31:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891154998] [2022-11-16 16:31:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:31:06,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891154998] [2022-11-16 16:31:06,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891154998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134459735] [2022-11-16 16:31:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:06,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:06,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:06,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:31:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:31:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 16:31:06,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:06,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134459735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:06,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:06,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 16:31:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889414756] [2022-11-16 16:31:06,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:06,219 INFO L87 Difference]: Start difference. First operand 947 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:31:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:06,454 INFO L93 Difference]: Finished difference Result 2798 states and 4338 transitions. [2022-11-16 16:31:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-16 16:31:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:06,465 INFO L225 Difference]: With dead ends: 2798 [2022-11-16 16:31:06,466 INFO L226 Difference]: Without dead ends: 1857 [2022-11-16 16:31:06,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:06,472 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:06,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-16 16:31:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1845. [2022-11-16 16:31:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1452 states have (on average 1.443526170798898) internal successors, (2096), 1465 states have internal predecessors, (2096), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2022-11-16 16:31:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2760 transitions. [2022-11-16 16:31:06,647 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2760 transitions. Word has length 87 [2022-11-16 16:31:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2760 transitions. [2022-11-16 16:31:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:31:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2760 transitions. [2022-11-16 16:31:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 16:31:06,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:06,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:06,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 16:31:06,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1147199418, now seen corresponding path program 1 times [2022-11-16 16:31:06,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:06,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095940727] [2022-11-16 16:31:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:06,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:31:06,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095940727] [2022-11-16 16:31:06,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095940727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:06,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:06,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:31:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178312034] [2022-11-16 16:31:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:06,940 INFO L87 Difference]: Start difference. First operand 1845 states and 2760 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 16:31:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:07,201 INFO L93 Difference]: Finished difference Result 3743 states and 5729 transitions. [2022-11-16 16:31:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:07,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-16 16:31:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:07,218 INFO L225 Difference]: With dead ends: 3743 [2022-11-16 16:31:07,218 INFO L226 Difference]: Without dead ends: 2269 [2022-11-16 16:31:07,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:07,225 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:07,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 335 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-16 16:31:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2089. [2022-11-16 16:31:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1680 states have (on average 1.4785714285714286) internal successors, (2484), 1693 states have internal predecessors, (2484), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2022-11-16 16:31:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3164 transitions. [2022-11-16 16:31:07,451 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3164 transitions. Word has length 87 [2022-11-16 16:31:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:07,451 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3164 transitions. [2022-11-16 16:31:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 16:31:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3164 transitions. [2022-11-16 16:31:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 16:31:07,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:07,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:07,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 16:31:07,461 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1406824200, now seen corresponding path program 1 times [2022-11-16 16:31:07,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179260834] [2022-11-16 16:31:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:07,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 16:31:07,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:07,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179260834] [2022-11-16 16:31:07,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179260834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:07,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:07,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:31:07,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008239714] [2022-11-16 16:31:07,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:07,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:07,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:07,541 INFO L87 Difference]: Start difference. First operand 2089 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:31:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:07,955 INFO L93 Difference]: Finished difference Result 6166 states and 9533 transitions. [2022-11-16 16:31:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-16 16:31:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:07,980 INFO L225 Difference]: With dead ends: 6166 [2022-11-16 16:31:07,980 INFO L226 Difference]: Without dead ends: 4083 [2022-11-16 16:31:07,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:07,991 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 127 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:07,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-11-16 16:31:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4053. [2022-11-16 16:31:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 3260 states have (on average 1.463803680981595) internal successors, (4772), 3285 states have internal predecessors, (4772), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2022-11-16 16:31:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6068 transitions. [2022-11-16 16:31:08,431 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6068 transitions. Word has length 116 [2022-11-16 16:31:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:08,432 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 6068 transitions. [2022-11-16 16:31:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:31:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6068 transitions. [2022-11-16 16:31:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 16:31:08,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:08,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 16:31:08,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1708634178, now seen corresponding path program 1 times [2022-11-16 16:31:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:08,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097500928] [2022-11-16 16:31:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:08,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 16:31:08,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097500928] [2022-11-16 16:31:08,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097500928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:08,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:08,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:31:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177611868] [2022-11-16 16:31:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:08,554 INFO L87 Difference]: Start difference. First operand 4053 states and 6068 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:31:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:09,330 INFO L93 Difference]: Finished difference Result 11970 states and 18269 transitions. [2022-11-16 16:31:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-16 16:31:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:09,401 INFO L225 Difference]: With dead ends: 11970 [2022-11-16 16:31:09,401 INFO L226 Difference]: Without dead ends: 7923 [2022-11-16 16:31:09,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:31:09,425 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 129 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:09,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2022-11-16 16:31:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7865. [2022-11-16 16:31:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 6324 states have (on average 1.4478178368121442) internal successors, (9156), 6373 states have internal predecessors, (9156), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2022-11-16 16:31:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11628 transitions. [2022-11-16 16:31:10,271 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11628 transitions. Word has length 116 [2022-11-16 16:31:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:10,272 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11628 transitions. [2022-11-16 16:31:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:31:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11628 transitions. [2022-11-16 16:31:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 16:31:10,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:10,304 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:31:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 16:31:10,304 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash -772571341, now seen corresponding path program 1 times [2022-11-16 16:31:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:10,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385976064] [2022-11-16 16:31:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:10,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 16:31:10,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385976064] [2022-11-16 16:31:10,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385976064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:10,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990779396] [2022-11-16 16:31:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:10,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:10,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:10,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 16:31:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:31:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 16:31:10,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:10,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990779396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:10,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:10,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 16:31:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312133588] [2022-11-16 16:31:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:10,694 INFO L87 Difference]: Start difference. First operand 7865 states and 11628 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 16:31:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:11,608 INFO L93 Difference]: Finished difference Result 14580 states and 21537 transitions. [2022-11-16 16:31:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-16 16:31:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:11,658 INFO L225 Difference]: With dead ends: 14580 [2022-11-16 16:31:11,659 INFO L226 Difference]: Without dead ends: 9922 [2022-11-16 16:31:11,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:11,685 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:11,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 184 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9922 states. [2022-11-16 16:31:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9922 to 9922. [2022-11-16 16:31:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 8146 states have (on average 1.40265160815124) internal successors, (11426), 8195 states have internal predecessors, (11426), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2022-11-16 16:31:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14114 transitions. [2022-11-16 16:31:12,901 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14114 transitions. Word has length 134 [2022-11-16 16:31:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:12,902 INFO L495 AbstractCegarLoop]: Abstraction has 9922 states and 14114 transitions. [2022-11-16 16:31:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 16:31:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14114 transitions. [2022-11-16 16:31:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 16:31:12,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:12,935 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, 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] [2022-11-16 16:31:12,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:13,141 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 146403282, now seen corresponding path program 1 times [2022-11-16 16:31:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356465783] [2022-11-16 16:31:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 16:31:13,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356465783] [2022-11-16 16:31:13,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356465783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165186039] [2022-11-16 16:31:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:13,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:13,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:13,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:31:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:13,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:31:13,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 16:31:13,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:13,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165186039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:13,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:13,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 16:31:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725747264] [2022-11-16 16:31:13,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:13,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:13,506 INFO L87 Difference]: Start difference. First operand 9922 states and 14114 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 16:31:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:14,429 INFO L93 Difference]: Finished difference Result 18887 states and 27280 transitions. [2022-11-16 16:31:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-16 16:31:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:14,494 INFO L225 Difference]: With dead ends: 18887 [2022-11-16 16:31:14,494 INFO L226 Difference]: Without dead ends: 13817 [2022-11-16 16:31:14,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:14,512 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 96 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:14,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13817 states. [2022-11-16 16:31:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13817 to 11342. [2022-11-16 16:31:15,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 9454 states have (on average 1.4387560820816585) internal successors, (13602), 9503 states have internal predecessors, (13602), 1161 states have call successors, (1161), 725 states have call predecessors, (1161), 726 states have return successors, (1639), 1114 states have call predecessors, (1639), 1161 states have call successors, (1639) [2022-11-16 16:31:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 16402 transitions. [2022-11-16 16:31:15,718 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 16402 transitions. Word has length 134 [2022-11-16 16:31:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:15,719 INFO L495 AbstractCegarLoop]: Abstraction has 11342 states and 16402 transitions. [2022-11-16 16:31:15,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 16:31:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 16402 transitions. [2022-11-16 16:31:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 16:31:15,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:15,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 16:31:15,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 16:31:15,960 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1075161124, now seen corresponding path program 2 times [2022-11-16 16:31:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:15,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964126901] [2022-11-16 16:31:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 16:31:16,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964126901] [2022-11-16 16:31:16,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964126901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844667662] [2022-11-16 16:31:16,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:31:16,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:16,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:16,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 16:31:16,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:31:16,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:31:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:31:16,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:16,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844667662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:16,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:31:16,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-16 16:31:16,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143618274] [2022-11-16 16:31:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:16,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:31:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:31:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:31:16,517 INFO L87 Difference]: Start difference. First operand 11342 states and 16402 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 16:31:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:18,503 INFO L93 Difference]: Finished difference Result 33956 states and 48967 transitions. [2022-11-16 16:31:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:31:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 134 [2022-11-16 16:31:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:18,595 INFO L225 Difference]: With dead ends: 33956 [2022-11-16 16:31:18,595 INFO L226 Difference]: Without dead ends: 22621 [2022-11-16 16:31:18,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:18,635 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:18,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 648 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22621 states. [2022-11-16 16:31:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22621 to 22587. [2022-11-16 16:31:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22587 states, 18821 states have (on average 1.4157058604750012) internal successors, (26645), 18950 states have internal predecessors, (26645), 2284 states have call successors, (2284), 1448 states have call predecessors, (2284), 1481 states have return successors, (3446), 2189 states have call predecessors, (3446), 2284 states have call successors, (3446) [2022-11-16 16:31:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22587 states to 22587 states and 32375 transitions. [2022-11-16 16:31:20,304 INFO L78 Accepts]: Start accepts. Automaton has 22587 states and 32375 transitions. Word has length 134 [2022-11-16 16:31:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:20,305 INFO L495 AbstractCegarLoop]: Abstraction has 22587 states and 32375 transitions. [2022-11-16 16:31:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 16:31:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 22587 states and 32375 transitions. [2022-11-16 16:31:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 16:31:20,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:20,356 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, 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] [2022-11-16 16:31:20,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:20,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 16:31:20,563 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -102813437, now seen corresponding path program 2 times [2022-11-16 16:31:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767819469] [2022-11-16 16:31:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 16:31:20,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767819469] [2022-11-16 16:31:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767819469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:20,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716982586] [2022-11-16 16:31:20,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:31:20,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:20,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:20,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fb862b-4f03-41fd-8604-d71c43217e45/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:31:21,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:31:21,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:31:21,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:31:21,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 16:31:21,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 16:31:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716982586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204181855] [2022-11-16 16:31:21,760 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-16 16:31:21,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:31:21,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:31:21,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:31:21,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:31:40,903 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 154 for LOIs [2022-11-16 16:31:40,945 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-16 16:31:49,011 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12