./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS --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 c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- 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-8393723 [2022-11-19 07:05:27,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:05:27,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:05:27,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:05:27,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:05:27,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:05:27,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:05:27,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:05:27,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:05:27,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:05:27,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:05:27,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:05:27,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:05:27,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:05:27,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:05:27,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:05:27,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:05:27,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:05:27,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:05:27,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:05:27,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:05:27,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:05:27,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:05:27,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:05:27,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:05:27,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:05:27,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:05:27,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:05:27,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:05:27,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:05:27,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:05:27,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:05:27,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:05:27,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:05:27,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:05:27,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:05:27,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:05:27,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:05:27,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:05:27,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:05:27,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:05:27,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:05:27,379 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:05:27,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:05:27,380 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:05:27,380 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:05:27,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:05:27,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:05:27,381 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:05:27,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:05:27,382 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:05:27,382 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:05:27,383 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:05:27,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:05:27,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:05:27,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:05:27,384 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:05:27,384 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:05:27,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:05:27,385 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:05:27,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:05:27,386 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:05:27,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:05:27,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:05:27,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:05:27,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:05:27,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:05:27,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:05:27,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:05:27,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:05:27,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:05:27,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:05:27,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:05:27,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:05:27,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:05:27,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:05:27,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:05:27,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:05:27,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:05:27,392 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:05:27,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:05:27,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:05:27,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:05:27,393 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_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2022-11-19 07:05:27,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:05:27,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:05:27,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:05:27,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:05:27,719 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:05:27,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-19 07:05:27,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/data/d08406c74/b520b24a216741b9848a40b3144ea4ac/FLAGd207cd927 [2022-11-19 07:05:28,327 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:05:28,328 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-19 07:05:28,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/data/d08406c74/b520b24a216741b9848a40b3144ea4ac/FLAGd207cd927 [2022-11-19 07:05:28,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/data/d08406c74/b520b24a216741b9848a40b3144ea4ac [2022-11-19 07:05:28,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:05:28,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:05:28,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:05:28,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:05:28,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:05:28,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:05:28" (1/1) ... [2022-11-19 07:05:28,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23468d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:28, skipping insertion in model container [2022-11-19 07:05:28,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:05:28" (1/1) ... [2022-11-19 07:05:28,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:05:28,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:05:28,963 WARN L234 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_16000cd6-9b93-4cea-b106-6b30e938bbe9/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-11-19 07:05:29,012 WARN L234 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_16000cd6-9b93-4cea-b106-6b30e938bbe9/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-11-19 07:05:29,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:05:29,089 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:05:29,101 WARN L234 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_16000cd6-9b93-4cea-b106-6b30e938bbe9/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-11-19 07:05:29,117 WARN L234 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_16000cd6-9b93-4cea-b106-6b30e938bbe9/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-11-19 07:05:29,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:05:29,170 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:05:29,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29 WrapperNode [2022-11-19 07:05:29,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:05:29,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:05:29,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:05:29,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:05:29,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,253 INFO L138 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2022-11-19 07:05:29,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:05:29,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:05:29,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:05:29,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:05:29,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,288 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:05:29,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:05:29,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:05:29,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:05:29,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (1/1) ... [2022-11-19 07:05:29,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:05:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:29,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:05:29,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:05:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:05:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:05:29,378 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:05:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-19 07:05:29,378 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-19 07:05:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:05:29,378 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:05:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:05:29,379 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:05:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:05:29,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:05:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:05:29,379 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:05:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:05:29,380 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:05:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:05:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:05:29,380 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:05:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:05:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:05:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:05:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:05:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 07:05:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 07:05:29,482 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:05:29,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:05:30,302 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:05:30,597 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:05:30,597 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 07:05:30,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:05:30 BoogieIcfgContainer [2022-11-19 07:05:30,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:05:30,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:05:30,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:05:30,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:05:30,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:05:28" (1/3) ... [2022-11-19 07:05:30,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427a37b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:05:30, skipping insertion in model container [2022-11-19 07:05:30,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:29" (2/3) ... [2022-11-19 07:05:30,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427a37b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:05:30, skipping insertion in model container [2022-11-19 07:05:30,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:05:30" (3/3) ... [2022-11-19 07:05:30,612 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-19 07:05:30,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:05:30,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:05:30,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:05:30,716 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;@6442cab8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:05:30,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:05:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 118 states have (on average 1.5508474576271187) internal successors, (183), 125 states have internal predecessors, (183), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-19 07:05:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:05:30,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:30,739 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] [2022-11-19 07:05:30,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1236950292, now seen corresponding path program 1 times [2022-11-19 07:05:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:30,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876454288] [2022-11-19 07:05:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:30,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:31,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876454288] [2022-11-19 07:05:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876454288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:31,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:31,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121469297] [2022-11-19 07:05:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:31,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:31,208 INFO L87 Difference]: Start difference. First operand has 157 states, 118 states have (on average 1.5508474576271187) internal successors, (183), 125 states have internal predecessors, (183), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) 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) [2022-11-19 07:05:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:31,453 INFO L93 Difference]: Finished difference Result 346 states and 518 transitions. [2022-11-19 07:05:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:31,456 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 [2022-11-19 07:05:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:31,468 INFO L225 Difference]: With dead ends: 346 [2022-11-19 07:05:31,468 INFO L226 Difference]: Without dead ends: 189 [2022-11-19 07:05:31,472 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 [2022-11-19 07:05:31,475 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 200 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:31,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 255 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-19 07:05:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-11-19 07:05:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 144 states have (on average 1.4583333333333333) internal successors, (210), 148 states have internal predecessors, (210), 29 states have call successors, (29), 12 states have call predecessors, (29), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 07:05:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 264 transitions. [2022-11-19 07:05:31,531 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 264 transitions. Word has length 28 [2022-11-19 07:05:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:31,532 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 264 transitions. [2022-11-19 07:05:31,532 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) [2022-11-19 07:05:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 264 transitions. [2022-11-19 07:05:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:05:31,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:31,535 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] [2022-11-19 07:05:31,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:05:31,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash 726237491, now seen corresponding path program 1 times [2022-11-19 07:05:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:31,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251466085] [2022-11-19 07:05:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:31,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:31,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:31,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251466085] [2022-11-19 07:05:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251466085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:31,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:31,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73962182] [2022-11-19 07:05:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:31,598 INFO L87 Difference]: Start difference. First operand 185 states and 264 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) [2022-11-19 07:05:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:31,696 INFO L93 Difference]: Finished difference Result 341 states and 481 transitions. [2022-11-19 07:05:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:31,697 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 [2022-11-19 07:05:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:31,699 INFO L225 Difference]: With dead ends: 341 [2022-11-19 07:05:31,699 INFO L226 Difference]: Without dead ends: 260 [2022-11-19 07:05:31,700 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 [2022-11-19 07:05:31,701 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 198 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:31,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 240 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-19 07:05:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2022-11-19 07:05:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 204 states have (on average 1.4264705882352942) internal successors, (291), 208 states have internal predecessors, (291), 36 states have call successors, (36), 16 states have call predecessors, (36), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-19 07:05:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 359 transitions. [2022-11-19 07:05:31,731 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 359 transitions. Word has length 29 [2022-11-19 07:05:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:31,732 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 359 transitions. [2022-11-19 07:05:31,732 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) [2022-11-19 07:05:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 359 transitions. [2022-11-19 07:05:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:05:31,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:31,734 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] [2022-11-19 07:05:31,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:05:31,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1184093097, now seen corresponding path program 1 times [2022-11-19 07:05:31,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972933294] [2022-11-19 07:05:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:31,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972933294] [2022-11-19 07:05:31,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972933294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:31,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:31,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214482191] [2022-11-19 07:05:31,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:31,814 INFO L87 Difference]: Start difference. First operand 256 states and 359 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) [2022-11-19 07:05:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:31,970 INFO L93 Difference]: Finished difference Result 496 states and 687 transitions. [2022-11-19 07:05:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:31,971 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 [2022-11-19 07:05:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:31,977 INFO L225 Difference]: With dead ends: 496 [2022-11-19 07:05:31,977 INFO L226 Difference]: Without dead ends: 344 [2022-11-19 07:05:31,985 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 [2022-11-19 07:05:31,988 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:31,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 365 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-19 07:05:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2022-11-19 07:05:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 267 states have (on average 1.408239700374532) internal successors, (376), 273 states have internal predecessors, (376), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 07:05:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-11-19 07:05:32,046 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 30 [2022-11-19 07:05:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:32,047 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-11-19 07:05:32,047 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) [2022-11-19 07:05:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-11-19 07:05:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:05:32,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:32,050 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] [2022-11-19 07:05:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:05:32,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:32,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1772657018, now seen corresponding path program 1 times [2022-11-19 07:05:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:32,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479344444] [2022-11-19 07:05:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:32,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:32,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479344444] [2022-11-19 07:05:32,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479344444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:32,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:05:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207541724] [2022-11-19 07:05:32,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:05:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:05:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:05:32,236 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:05:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:32,520 INFO L93 Difference]: Finished difference Result 514 states and 739 transitions. [2022-11-19 07:05:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:05:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-19 07:05:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:32,524 INFO L225 Difference]: With dead ends: 514 [2022-11-19 07:05:32,524 INFO L226 Difference]: Without dead ends: 416 [2022-11-19 07:05:32,525 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 [2022-11-19 07:05:32,526 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 314 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:32,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 478 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:05:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-19 07:05:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 415. [2022-11-19 07:05:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 332 states have (on average 1.4036144578313252) internal successors, (466), 339 states have internal predecessors, (466), 56 states have call successors, (56), 27 states have call predecessors, (56), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-19 07:05:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 574 transitions. [2022-11-19 07:05:32,574 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 574 transitions. Word has length 44 [2022-11-19 07:05:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:32,574 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 574 transitions. [2022-11-19 07:05:32,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:05:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 574 transitions. [2022-11-19 07:05:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:05:32,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:32,577 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] [2022-11-19 07:05:32,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:05:32,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:32,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1790038805, now seen corresponding path program 1 times [2022-11-19 07:05:32,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:32,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894211768] [2022-11-19 07:05:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:32,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:32,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894211768] [2022-11-19 07:05:32,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894211768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:32,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:32,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785522829] [2022-11-19 07:05:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:32,651 INFO L87 Difference]: Start difference. First operand 415 states and 574 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) [2022-11-19 07:05:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:32,770 INFO L93 Difference]: Finished difference Result 578 states and 792 transitions. [2022-11-19 07:05:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:32,771 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 [2022-11-19 07:05:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:32,774 INFO L225 Difference]: With dead ends: 578 [2022-11-19 07:05:32,774 INFO L226 Difference]: Without dead ends: 420 [2022-11-19 07:05:32,775 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 [2022-11-19 07:05:32,776 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 32 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:32,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 395 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-19 07:05:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 409. [2022-11-19 07:05:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 326 states have (on average 1.3865030674846626) internal successors, (452), 333 states have internal predecessors, (452), 56 states have call successors, (56), 27 states have call predecessors, (56), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-19 07:05:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 560 transitions. [2022-11-19 07:05:32,812 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 560 transitions. Word has length 43 [2022-11-19 07:05:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:32,813 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 560 transitions. [2022-11-19 07:05:32,813 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) [2022-11-19 07:05:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 560 transitions. [2022-11-19 07:05:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:05:32,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:32,815 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] [2022-11-19 07:05:32,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:05:32,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash -881079008, now seen corresponding path program 1 times [2022-11-19 07:05:32,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178620716] [2022-11-19 07:05:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:05:32,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178620716] [2022-11-19 07:05:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178620716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:32,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768484639] [2022-11-19 07:05:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:32,864 INFO L87 Difference]: Start difference. First operand 409 states and 560 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) [2022-11-19 07:05:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:32,983 INFO L93 Difference]: Finished difference Result 658 states and 884 transitions. [2022-11-19 07:05:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:32,984 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 [2022-11-19 07:05:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:32,987 INFO L225 Difference]: With dead ends: 658 [2022-11-19 07:05:32,987 INFO L226 Difference]: Without dead ends: 455 [2022-11-19 07:05:32,988 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 [2022-11-19 07:05:32,989 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 183 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:32,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 237 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-19 07:05:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-19 07:05:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 365 states have (on average 1.356164383561644) internal successors, (495), 372 states have internal predecessors, (495), 60 states have call successors, (60), 30 states have call predecessors, (60), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-19 07:05:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 611 transitions. [2022-11-19 07:05:33,032 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 611 transitions. Word has length 46 [2022-11-19 07:05:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:33,032 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 611 transitions. [2022-11-19 07:05:33,032 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) [2022-11-19 07:05:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 611 transitions. [2022-11-19 07:05:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:05:33,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:33,034 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:05:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:05:33,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1350030202, now seen corresponding path program 1 times [2022-11-19 07:05:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435630799] [2022-11-19 07:05:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:05:33,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435630799] [2022-11-19 07:05:33,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435630799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:33,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:33,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:05:33,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227662302] [2022-11-19 07:05:33,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:33,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:05:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:05:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:05:33,133 INFO L87 Difference]: Start difference. First operand 455 states and 611 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-19 07:05:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:33,347 INFO L93 Difference]: Finished difference Result 682 states and 911 transitions. [2022-11-19 07:05:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:05:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2022-11-19 07:05:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:33,352 INFO L225 Difference]: With dead ends: 682 [2022-11-19 07:05:33,353 INFO L226 Difference]: Without dead ends: 453 [2022-11-19 07:05:33,354 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 [2022-11-19 07:05:33,355 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 238 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:33,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 370 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:05:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-19 07:05:33,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2022-11-19 07:05:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 361 states have (on average 1.3268698060941828) internal successors, (479), 368 states have internal predecessors, (479), 60 states have call successors, (60), 30 states have call predecessors, (60), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-19 07:05:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 595 transitions. [2022-11-19 07:05:33,405 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 595 transitions. Word has length 47 [2022-11-19 07:05:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:33,406 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 595 transitions. [2022-11-19 07:05:33,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-19 07:05:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 595 transitions. [2022-11-19 07:05:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:05:33,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:33,408 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] [2022-11-19 07:05:33,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:05:33,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:33,409 INFO L85 PathProgramCache]: Analyzing trace with hash -477191547, now seen corresponding path program 1 times [2022-11-19 07:05:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:33,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720572610] [2022-11-19 07:05:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:33,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:05:33,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:33,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720572610] [2022-11-19 07:05:33,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720572610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:33,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:33,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:05:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620540030] [2022-11-19 07:05:33,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:33,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:05:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:05:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:05:33,563 INFO L87 Difference]: Start difference. First operand 451 states and 595 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) [2022-11-19 07:05:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:33,762 INFO L93 Difference]: Finished difference Result 487 states and 636 transitions. [2022-11-19 07:05:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:05:33,762 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 [2022-11-19 07:05:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:33,766 INFO L225 Difference]: With dead ends: 487 [2022-11-19 07:05:33,766 INFO L226 Difference]: Without dead ends: 484 [2022-11-19 07:05:33,767 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 [2022-11-19 07:05:33,768 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 334 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:33,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 230 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-19 07:05:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 450. [2022-11-19 07:05:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 361 states have (on average 1.3213296398891967) internal successors, (477), 367 states have internal predecessors, (477), 59 states have call successors, (59), 30 states have call predecessors, (59), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-19 07:05:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 592 transitions. [2022-11-19 07:05:33,839 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 592 transitions. Word has length 47 [2022-11-19 07:05:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:33,842 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 592 transitions. [2022-11-19 07:05:33,842 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) [2022-11-19 07:05:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 592 transitions. [2022-11-19 07:05:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 07:05:33,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:33,845 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] [2022-11-19 07:05:33,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:05:33,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1908869981, now seen corresponding path program 1 times [2022-11-19 07:05:33,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:33,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746323934] [2022-11-19 07:05:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:33,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:05:34,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:34,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746323934] [2022-11-19 07:05:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746323934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018063695] [2022-11-19 07:05:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:34,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:34,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:05:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:05:34,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:34,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:05:34,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018063695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232793668] [2022-11-19 07:05:34,823 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-19 07:05:34,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:34,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:34,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:34,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:37,953 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 105 for LOIs [2022-11-19 07:05:37,968 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 120 for LOIs [2022-11-19 07:05:37,985 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 256 for LOIs [2022-11-19 07:05:39,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:55,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10682#(and (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~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) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 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 [2022-11-19 07:05:55,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:55,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:55,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:05:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757015744] [2022-11-19 07:05:55,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:55,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:05:55,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:05:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:05:55,787 INFO L87 Difference]: Start difference. First operand 450 states and 592 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2022-11-19 07:05:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:56,169 INFO L93 Difference]: Finished difference Result 851 states and 1090 transitions. [2022-11-19 07:05:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:05:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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 48 [2022-11-19 07:05:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:56,175 INFO L225 Difference]: With dead ends: 851 [2022-11-19 07:05:56,175 INFO L226 Difference]: Without dead ends: 848 [2022-11-19 07:05:56,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:05:56,179 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 333 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:56,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 735 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:05:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-19 07:05:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 649. [2022-11-19 07:05:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 528 states have (on average 1.303030303030303) internal successors, (688), 536 states have internal predecessors, (688), 78 states have call successors, (78), 43 states have call predecessors, (78), 41 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-19 07:05:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 841 transitions. [2022-11-19 07:05:56,248 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 841 transitions. Word has length 48 [2022-11-19 07:05:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:56,248 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 841 transitions. [2022-11-19 07:05:56,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2022-11-19 07:05:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 841 transitions. [2022-11-19 07:05:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:05:56,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:56,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:05:56,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:56,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2114969559, now seen corresponding path program 2 times [2022-11-19 07:05:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:56,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663294388] [2022-11-19 07:05:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:05:56,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663294388] [2022-11-19 07:05:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663294388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:56,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:56,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331227488] [2022-11-19 07:05:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:56,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:56,528 INFO L87 Difference]: Start difference. First operand 649 states and 841 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-19 07:05:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:56,630 INFO L93 Difference]: Finished difference Result 955 states and 1226 transitions. [2022-11-19 07:05:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 61 [2022-11-19 07:05:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:56,634 INFO L225 Difference]: With dead ends: 955 [2022-11-19 07:05:56,636 INFO L226 Difference]: Without dead ends: 593 [2022-11-19 07:05:56,637 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 [2022-11-19 07:05:56,638 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 194 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:56,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 246 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:05:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-19 07:05:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2022-11-19 07:05:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 479 states have (on average 1.290187891440501) internal successors, (618), 488 states have internal predecessors, (618), 72 states have call successors, (72), 39 states have call predecessors, (72), 37 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-19 07:05:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 759 transitions. [2022-11-19 07:05:56,694 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 759 transitions. Word has length 61 [2022-11-19 07:05:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:56,694 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 759 transitions. [2022-11-19 07:05:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-19 07:05:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 759 transitions. [2022-11-19 07:05:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:05:56,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:56,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:05:56,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2110704546, now seen corresponding path program 1 times [2022-11-19 07:05:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327967743] [2022-11-19 07:05:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:05:56,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327967743] [2022-11-19 07:05:56,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327967743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966905460] [2022-11-19 07:05:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:56,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:56,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:56,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:05:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:05:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:05:57,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:57,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966905460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:57,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:05:57,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:05:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337059] [2022-11-19 07:05:57,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:57,034 INFO L87 Difference]: Start difference. First operand 590 states and 759 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:05:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:57,133 INFO L93 Difference]: Finished difference Result 684 states and 873 transitions. [2022-11-19 07:05:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-19 07:05:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:57,136 INFO L225 Difference]: With dead ends: 684 [2022-11-19 07:05:57,136 INFO L226 Difference]: Without dead ends: 189 [2022-11-19 07:05:57,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:57,137 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 363 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 [2022-11-19 07:05:57,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-19 07:05:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-19 07:05:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 142 states have (on average 1.4295774647887325) internal successors, (203), 145 states have internal predecessors, (203), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-19 07:05:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2022-11-19 07:05:57,169 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 73 [2022-11-19 07:05:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:57,169 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2022-11-19 07:05:57,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:05:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2022-11-19 07:05:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:05:57,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:57,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:57,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:57,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:57,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2044960776, now seen corresponding path program 1 times [2022-11-19 07:05:57,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:57,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342646403] [2022-11-19 07:05:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:05:57,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342646403] [2022-11-19 07:05:57,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342646403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235697075] [2022-11-19 07:05:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:57,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:57,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:57,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:57,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:05:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:05:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:05:57,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:57,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235697075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:57,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:05:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:05:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802213212] [2022-11-19 07:05:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:57,673 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:05:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:57,781 INFO L93 Difference]: Finished difference Result 548 states and 792 transitions. [2022-11-19 07:05:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-19 07:05:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:57,784 INFO L225 Difference]: With dead ends: 548 [2022-11-19 07:05:57,784 INFO L226 Difference]: Without dead ends: 365 [2022-11-19 07:05:57,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:57,786 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 119 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 278 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 [2022-11-19 07:05:57,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 278 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-19 07:05:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2022-11-19 07:05:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 274 states have (on average 1.4233576642335766) internal successors, (390), 278 states have internal predecessors, (390), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-19 07:05:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 508 transitions. [2022-11-19 07:05:57,819 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 508 transitions. Word has length 81 [2022-11-19 07:05:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:57,819 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 508 transitions. [2022-11-19 07:05:57,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:05:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 508 transitions. [2022-11-19 07:05:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:05:57,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:57,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:57,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:05:58,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:58,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1154290648, now seen corresponding path program 1 times [2022-11-19 07:05:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:58,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056694876] [2022-11-19 07:05:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:05:58,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056694876] [2022-11-19 07:05:58,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056694876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497501029] [2022-11-19 07:05:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:58,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:58,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:05:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:05:58,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:05:58,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:58,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497501029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:58,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:05:58,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:05:58,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715312256] [2022-11-19 07:05:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:58,311 INFO L87 Difference]: Start difference. First operand 359 states and 508 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:05:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:58,443 INFO L93 Difference]: Finished difference Result 1052 states and 1511 transitions. [2022-11-19 07:05:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-19 07:05:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:58,448 INFO L225 Difference]: With dead ends: 1052 [2022-11-19 07:05:58,448 INFO L226 Difference]: Without dead ends: 699 [2022-11-19 07:05:58,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:58,451 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 125 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:58,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 266 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-19 07:05:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 691. [2022-11-19 07:05:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 532 states have (on average 1.413533834586466) internal successors, (752), 538 states have internal predecessors, (752), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-19 07:05:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 970 transitions. [2022-11-19 07:05:58,514 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 970 transitions. Word has length 81 [2022-11-19 07:05:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:58,514 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 970 transitions. [2022-11-19 07:05:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:05:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 970 transitions. [2022-11-19 07:05:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:05:58,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:58,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:58,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:05:58,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:05:58,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2074124360, now seen corresponding path program 1 times [2022-11-19 07:05:58,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:58,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647129155] [2022-11-19 07:05:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:05:58,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:58,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647129155] [2022-11-19 07:05:58,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647129155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:58,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:58,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134131550] [2022-11-19 07:05:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:58,832 INFO L87 Difference]: Start difference. First operand 691 states and 970 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:05:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:58,964 INFO L93 Difference]: Finished difference Result 1227 states and 1745 transitions. [2022-11-19 07:05:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:58,965 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-19 07:05:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:58,969 INFO L225 Difference]: With dead ends: 1227 [2022-11-19 07:05:58,969 INFO L226 Difference]: Without dead ends: 867 [2022-11-19 07:05:58,973 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 [2022-11-19 07:05:58,974 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 55 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:58,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 306 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-19 07:05:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 795. [2022-11-19 07:05:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 628 states have (on average 1.4522292993630572) internal successors, (912), 634 states have internal predecessors, (912), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-19 07:05:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1138 transitions. [2022-11-19 07:05:59,049 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1138 transitions. Word has length 81 [2022-11-19 07:05:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:59,050 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1138 transitions. [2022-11-19 07:05:59,051 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:05:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1138 transitions. [2022-11-19 07:05:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:05:59,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:59,054 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:05:59,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:05:59,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 819841231, now seen corresponding path program 1 times [2022-11-19 07:05:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222622713] [2022-11-19 07:05:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:59,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:05:59,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222622713] [2022-11-19 07:05:59,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222622713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:59,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:59,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:59,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693591956] [2022-11-19 07:05:59,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:59,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:59,133 INFO L87 Difference]: Start difference. First operand 795 states and 1138 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:05:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:59,358 INFO L93 Difference]: Finished difference Result 2336 states and 3379 transitions. [2022-11-19 07:05:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-19 07:05:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:59,365 INFO L225 Difference]: With dead ends: 2336 [2022-11-19 07:05:59,366 INFO L226 Difference]: Without dead ends: 1547 [2022-11-19 07:05:59,368 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 [2022-11-19 07:05:59,368 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 117 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:59,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 266 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-11-19 07:05:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1531. [2022-11-19 07:05:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1212 states have (on average 1.4356435643564356) internal successors, (1740), 1222 states have internal predecessors, (1740), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-19 07:05:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2166 transitions. [2022-11-19 07:05:59,516 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2166 transitions. Word has length 107 [2022-11-19 07:05:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:59,517 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 2166 transitions. [2022-11-19 07:05:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:05:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2166 transitions. [2022-11-19 07:05:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:05:59,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:59,523 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:05:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:05:59,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -811705353, now seen corresponding path program 1 times [2022-11-19 07:05:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061559306] [2022-11-19 07:05:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:05:59,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061559306] [2022-11-19 07:05:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061559306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:59,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:05:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545583838] [2022-11-19 07:05:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:59,641 INFO L87 Difference]: Start difference. First operand 1531 states and 2166 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:05:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:59,998 INFO L93 Difference]: Finished difference Result 4508 states and 6439 transitions. [2022-11-19 07:05:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-19 07:05:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:00,013 INFO L225 Difference]: With dead ends: 4508 [2022-11-19 07:06:00,013 INFO L226 Difference]: Without dead ends: 2983 [2022-11-19 07:06:00,018 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 [2022-11-19 07:06:00,019 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 119 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:00,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 269 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-19 07:06:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2955. [2022-11-19 07:06:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2340 states have (on average 1.4170940170940172) internal successors, (3316), 2358 states have internal predecessors, (3316), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-19 07:06:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4126 transitions. [2022-11-19 07:06:00,327 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4126 transitions. Word has length 107 [2022-11-19 07:06:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:00,328 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4126 transitions. [2022-11-19 07:06:00,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4126 transitions. [2022-11-19 07:06:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:06:00,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:00,339 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:00,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:06:00,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 661522026, now seen corresponding path program 1 times [2022-11-19 07:06:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906870959] [2022-11-19 07:06:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:00,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:06:00,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906870959] [2022-11-19 07:06:00,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906870959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700083568] [2022-11-19 07:06:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:00,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:00,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:00,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:06:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:00,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:06:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:06:00,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700083568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:00,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:00,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:06:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737100347] [2022-11-19 07:06:00,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:00,857 INFO L87 Difference]: Start difference. First operand 2955 states and 4126 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:01,225 INFO L93 Difference]: Finished difference Result 4499 states and 6404 transitions. [2022-11-19 07:06:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-11-19 07:06:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:01,240 INFO L225 Difference]: With dead ends: 4499 [2022-11-19 07:06:01,241 INFO L226 Difference]: Without dead ends: 2975 [2022-11-19 07:06:01,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:01,246 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 113 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:01,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 323 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2022-11-19 07:06:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2939. [2022-11-19 07:06:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2324 states have (on average 1.3924268502581756) internal successors, (3236), 2342 states have internal predecessors, (3236), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-19 07:06:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4046 transitions. [2022-11-19 07:06:01,640 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4046 transitions. Word has length 124 [2022-11-19 07:06:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:01,640 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 4046 transitions. [2022-11-19 07:06:01,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4046 transitions. [2022-11-19 07:06:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:06:01,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:01,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:01,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:01,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:06:01,861 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1669816852, now seen corresponding path program 1 times [2022-11-19 07:06:01,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131885332] [2022-11-19 07:06:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:01,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:06:02,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131885332] [2022-11-19 07:06:02,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131885332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:02,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467856295] [2022-11-19 07:06:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:02,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:06:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:06:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:06:02,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:02,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467856295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:02,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:02,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:06:02,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991602952] [2022-11-19 07:06:02,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:02,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:02,332 INFO L87 Difference]: Start difference. First operand 2939 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:02,718 INFO L93 Difference]: Finished difference Result 5153 states and 7011 transitions. [2022-11-19 07:06:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-19 07:06:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:02,738 INFO L225 Difference]: With dead ends: 5153 [2022-11-19 07:06:02,738 INFO L226 Difference]: Without dead ends: 3653 [2022-11-19 07:06:02,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:02,744 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 125 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:02,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 166 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:06:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2022-11-19 07:06:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 3653. [2022-11-19 07:06:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 2946 states have (on average 1.3475899524779362) internal successors, (3970), 2964 states have internal predecessors, (3970), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2022-11-19 07:06:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 4840 transitions. [2022-11-19 07:06:03,135 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 4840 transitions. Word has length 124 [2022-11-19 07:06:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:03,135 INFO L495 AbstractCegarLoop]: Abstraction has 3653 states and 4840 transitions. [2022-11-19 07:06:03,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 4840 transitions. [2022-11-19 07:06:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:06:03,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:03,148 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:03,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:03,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:06:03,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -992350885, now seen corresponding path program 1 times [2022-11-19 07:06:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977510219] [2022-11-19 07:06:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:06:03,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977510219] [2022-11-19 07:06:03,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977510219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919026406] [2022-11-19 07:06:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:03,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:03,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:03,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:03,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:06:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:06:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:06:03,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:03,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919026406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:03,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:03,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:06:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730090860] [2022-11-19 07:06:03,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:03,863 INFO L87 Difference]: Start difference. First operand 3653 states and 4840 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:04,298 INFO L93 Difference]: Finished difference Result 5557 states and 7518 transitions. [2022-11-19 07:06:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-19 07:06:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:04,318 INFO L225 Difference]: With dead ends: 5557 [2022-11-19 07:06:04,319 INFO L226 Difference]: Without dead ends: 3673 [2022-11-19 07:06:04,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:04,325 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 111 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:04,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 339 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2022-11-19 07:06:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3637. [2022-11-19 07:06:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 2930 states have (on average 1.322184300341297) internal successors, (3874), 2948 states have internal predecessors, (3874), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2022-11-19 07:06:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 4744 transitions. [2022-11-19 07:06:04,852 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 4744 transitions. Word has length 121 [2022-11-19 07:06:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 3637 states and 4744 transitions. [2022-11-19 07:06:04,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 4744 transitions. [2022-11-19 07:06:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:06:04,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:04,870 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:06:04,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:05,076 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 962451899, now seen corresponding path program 1 times [2022-11-19 07:06:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984642741] [2022-11-19 07:06:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:06:05,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984642741] [2022-11-19 07:06:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984642741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221549641] [2022-11-19 07:06:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:05,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:05,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:06:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:06:05,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:06:05,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221549641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:05,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:06:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397791440] [2022-11-19 07:06:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:05,571 INFO L87 Difference]: Start difference. First operand 3637 states and 4744 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:06,137 INFO L93 Difference]: Finished difference Result 8561 states and 11329 transitions. [2022-11-19 07:06:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-19 07:06:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:06,172 INFO L225 Difference]: With dead ends: 8561 [2022-11-19 07:06:06,172 INFO L226 Difference]: Without dead ends: 4931 [2022-11-19 07:06:06,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:06,182 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:06,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 253 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-11-19 07:06:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 3997. [2022-11-19 07:06:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3254 states have (on average 1.3491087891825446) internal successors, (4390), 3273 states have internal predecessors, (4390), 454 states have call successors, (454), 289 states have call predecessors, (454), 288 states have return successors, (452), 435 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-19 07:06:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 5296 transitions. [2022-11-19 07:06:06,684 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 5296 transitions. Word has length 121 [2022-11-19 07:06:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:06,684 INFO L495 AbstractCegarLoop]: Abstraction has 3997 states and 5296 transitions. [2022-11-19 07:06:06,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 5296 transitions. [2022-11-19 07:06:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:06:06,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:06,696 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:06:06,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:06:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:06,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 291305754, now seen corresponding path program 2 times [2022-11-19 07:06:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:06,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610680149] [2022-11-19 07:06:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:06:07,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610680149] [2022-11-19 07:06:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610680149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773666775] [2022-11-19 07:06:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:06:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:07,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:07,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:06:07,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:06:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:07,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:06:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:06:07,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773666775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:06:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147352922] [2022-11-19 07:06:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:07,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:07,230 INFO L87 Difference]: Start difference. First operand 3997 states and 5296 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:07,759 INFO L93 Difference]: Finished difference Result 7483 states and 10042 transitions. [2022-11-19 07:06:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-19 07:06:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:07,792 INFO L225 Difference]: With dead ends: 7483 [2022-11-19 07:06:07,793 INFO L226 Difference]: Without dead ends: 5455 [2022-11-19 07:06:07,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:07,802 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 80 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:07,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 328 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-11-19 07:06:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 4653. [2022-11-19 07:06:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 3846 states have (on average 1.3868954758190328) internal successors, (5334), 3865 states have internal predecessors, (5334), 486 states have call successors, (486), 321 states have call predecessors, (486), 320 states have return successors, (484), 467 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-19 07:06:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 6304 transitions. [2022-11-19 07:06:08,469 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 6304 transitions. Word has length 121 [2022-11-19 07:06:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 4653 states and 6304 transitions. [2022-11-19 07:06:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 6304 transitions. [2022-11-19 07:06:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:06:08,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:08,487 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:06:08,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:06:08,693 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1400990212, now seen corresponding path program 1 times [2022-11-19 07:06:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892963244] [2022-11-19 07:06:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:06:08,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892963244] [2022-11-19 07:06:08,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892963244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105657709] [2022-11-19 07:06:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:08,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:08,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:08,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:06:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:06:09,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:06:09,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105657709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:09,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:06:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777408113] [2022-11-19 07:06:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:09,070 INFO L87 Difference]: Start difference. First operand 4653 states and 6304 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:09,827 INFO L93 Difference]: Finished difference Result 8843 states and 12106 transitions. [2022-11-19 07:06:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-19 07:06:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:09,849 INFO L225 Difference]: With dead ends: 8843 [2022-11-19 07:06:09,849 INFO L226 Difference]: Without dead ends: 6463 [2022-11-19 07:06:09,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:09,858 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 86 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:09,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 333 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-11-19 07:06:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 5533. [2022-11-19 07:06:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 4630 states have (on average 1.4129589632829374) internal successors, (6542), 4649 states have internal predecessors, (6542), 534 states have call successors, (534), 369 states have call predecessors, (534), 368 states have return successors, (532), 515 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-19 07:06:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7608 transitions. [2022-11-19 07:06:10,462 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7608 transitions. Word has length 121 [2022-11-19 07:06:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:10,462 INFO L495 AbstractCegarLoop]: Abstraction has 5533 states and 7608 transitions. [2022-11-19 07:06:10,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7608 transitions. [2022-11-19 07:06:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:06:10,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:10,476 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:06:10,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:10,682 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash 706548650, now seen corresponding path program 1 times [2022-11-19 07:06:10,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:10,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371522788] [2022-11-19 07:06:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:10,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:06:10,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371522788] [2022-11-19 07:06:10,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371522788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412365313] [2022-11-19 07:06:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:10,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:10,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:10,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:06:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:06:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:06:10,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412365313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:10,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:10,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:06:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582491486] [2022-11-19 07:06:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:10,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:10,989 INFO L87 Difference]: Start difference. First operand 5533 states and 7608 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:11,614 INFO L93 Difference]: Finished difference Result 10307 states and 14322 transitions. [2022-11-19 07:06:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-19 07:06:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:11,640 INFO L225 Difference]: With dead ends: 10307 [2022-11-19 07:06:11,640 INFO L226 Difference]: Without dead ends: 7475 [2022-11-19 07:06:11,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:11,649 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 74 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:11,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 323 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2022-11-19 07:06:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 6769. [2022-11-19 07:06:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 5722 states have (on average 1.4306186648025165) internal successors, (8186), 5741 states have internal predecessors, (8186), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-19 07:06:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9396 transitions. [2022-11-19 07:06:12,388 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9396 transitions. Word has length 121 [2022-11-19 07:06:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:12,388 INFO L495 AbstractCegarLoop]: Abstraction has 6769 states and 9396 transitions. [2022-11-19 07:06:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9396 transitions. [2022-11-19 07:06:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:06:12,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:12,403 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:12,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:06:12,609 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1401355427, now seen corresponding path program 1 times [2022-11-19 07:06:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:12,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911569819] [2022-11-19 07:06:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:06:12,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911569819] [2022-11-19 07:06:12,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911569819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130042137] [2022-11-19 07:06:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:12,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:12,798 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:06:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:12,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:06:12,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:06:13,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130042137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:13,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:13,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:06:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385527321] [2022-11-19 07:06:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:06:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:06:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:06:13,025 INFO L87 Difference]: Start difference. First operand 6769 states and 9396 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:06:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:14,304 INFO L93 Difference]: Finished difference Result 20007 states and 27720 transitions. [2022-11-19 07:06:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:06:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-11-19 07:06:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:14,347 INFO L225 Difference]: With dead ends: 20007 [2022-11-19 07:06:14,347 INFO L226 Difference]: Without dead ends: 13245 [2022-11-19 07:06:14,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:06:14,364 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 134 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:14,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 586 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2022-11-19 07:06:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 13221. [2022-11-19 07:06:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13221 states, 11140 states have (on average 1.407181328545781) internal successors, (15676), 11192 states have internal predecessors, (15676), 1187 states have call successors, (1187), 878 states have call predecessors, (1187), 893 states have return successors, (1233), 1151 states have call predecessors, (1233), 1185 states have call successors, (1233) [2022-11-19 07:06:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13221 states to 13221 states and 18096 transitions. [2022-11-19 07:06:15,498 INFO L78 Accepts]: Start accepts. Automaton has 13221 states and 18096 transitions. Word has length 126 [2022-11-19 07:06:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:15,498 INFO L495 AbstractCegarLoop]: Abstraction has 13221 states and 18096 transitions. [2022-11-19 07:06:15,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:06:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13221 states and 18096 transitions. [2022-11-19 07:06:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:06:15,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:15,528 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:15,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:15,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1688883094, now seen corresponding path program 1 times [2022-11-19 07:06:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631311519] [2022-11-19 07:06:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:06:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631311519] [2022-11-19 07:06:15,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631311519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776321911] [2022-11-19 07:06:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:15,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:16,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:06:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:06:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:06:16,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:16,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776321911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:16,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:16,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:06:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885280300] [2022-11-19 07:06:16,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:16,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:16,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:16,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:16,268 INFO L87 Difference]: Start difference. First operand 13221 states and 18096 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:17,422 INFO L93 Difference]: Finished difference Result 23654 states and 32229 transitions. [2022-11-19 07:06:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-19 07:06:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:17,456 INFO L225 Difference]: With dead ends: 23654 [2022-11-19 07:06:17,456 INFO L226 Difference]: Without dead ends: 10440 [2022-11-19 07:06:17,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:06:17,482 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 359 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:17,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 346 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:06:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2022-11-19 07:06:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10182. [2022-11-19 07:06:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 8584 states have (on average 1.3986486486486487) internal successors, (12006), 8627 states have internal predecessors, (12006), 903 states have call successors, (903), 663 states have call predecessors, (903), 694 states have return successors, (933), 892 states have call predecessors, (933), 901 states have call successors, (933) [2022-11-19 07:06:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 13842 transitions. [2022-11-19 07:06:18,505 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 13842 transitions. Word has length 126 [2022-11-19 07:06:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:18,506 INFO L495 AbstractCegarLoop]: Abstraction has 10182 states and 13842 transitions. [2022-11-19 07:06:18,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 13842 transitions. [2022-11-19 07:06:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:06:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:18,524 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-19 07:06:18,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:18,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:18,730 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1497246034, now seen corresponding path program 2 times [2022-11-19 07:06:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544387967] [2022-11-19 07:06:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:18,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:06:18,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544387967] [2022-11-19 07:06:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544387967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392665158] [2022-11-19 07:06:18,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:06:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:18,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:18,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:06:19,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:06:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:06:19,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:06:19,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:19,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392665158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:19,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:19,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:06:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436664817] [2022-11-19 07:06:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:19,117 INFO L87 Difference]: Start difference. First operand 10182 states and 13842 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:20,320 INFO L93 Difference]: Finished difference Result 13579 states and 18550 transitions. [2022-11-19 07:06:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-19 07:06:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:20,355 INFO L225 Difference]: With dead ends: 13579 [2022-11-19 07:06:20,355 INFO L226 Difference]: Without dead ends: 9902 [2022-11-19 07:06:20,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:20,366 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 28 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:20,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 256 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:06:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9902 states. [2022-11-19 07:06:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9902 to 9462. [2022-11-19 07:06:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9462 states, 7960 states have (on average 1.4108040201005025) internal successors, (11230), 7979 states have internal predecessors, (11230), 871 states have call successors, (871), 631 states have call predecessors, (871), 630 states have return successors, (869), 852 states have call predecessors, (869), 869 states have call successors, (869) [2022-11-19 07:06:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9462 states to 9462 states and 12970 transitions. [2022-11-19 07:06:21,452 INFO L78 Accepts]: Start accepts. Automaton has 9462 states and 12970 transitions. Word has length 127 [2022-11-19 07:06:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:21,453 INFO L495 AbstractCegarLoop]: Abstraction has 9462 states and 12970 transitions. [2022-11-19 07:06:21,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9462 states and 12970 transitions. [2022-11-19 07:06:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:06:21,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:21,470 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-19 07:06:21,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:06:21,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1166046018, now seen corresponding path program 1 times [2022-11-19 07:06:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219350524] [2022-11-19 07:06:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:06:21,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:21,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219350524] [2022-11-19 07:06:21,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219350524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432505779] [2022-11-19 07:06:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:21,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:21,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:21,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:06:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:06:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:06:22,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:22,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432505779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:22,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:22,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-19 07:06:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262463297] [2022-11-19 07:06:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:22,106 INFO L87 Difference]: Start difference. First operand 9462 states and 12970 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:23,640 INFO L93 Difference]: Finished difference Result 22298 states and 30452 transitions. [2022-11-19 07:06:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-19 07:06:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:23,683 INFO L225 Difference]: With dead ends: 22298 [2022-11-19 07:06:23,684 INFO L226 Difference]: Without dead ends: 12888 [2022-11-19 07:06:23,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:23,702 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 455 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:23,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 278 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:06:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12888 states. [2022-11-19 07:06:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12888 to 12884. [2022-11-19 07:06:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12884 states, 10766 states have (on average 1.3806427642578487) internal successors, (14864), 10793 states have internal predecessors, (14864), 1231 states have call successors, (1231), 887 states have call predecessors, (1231), 886 states have return successors, (1229), 1204 states have call predecessors, (1229), 1229 states have call successors, (1229) [2022-11-19 07:06:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12884 states to 12884 states and 17324 transitions. [2022-11-19 07:06:24,899 INFO L78 Accepts]: Start accepts. Automaton has 12884 states and 17324 transitions. Word has length 127 [2022-11-19 07:06:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:24,900 INFO L495 AbstractCegarLoop]: Abstraction has 12884 states and 17324 transitions. [2022-11-19 07:06:24,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12884 states and 17324 transitions. [2022-11-19 07:06:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:06:24,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:24,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:24,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:25,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:06:25,128 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -679319022, now seen corresponding path program 1 times [2022-11-19 07:06:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449537993] [2022-11-19 07:06:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:06:25,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449537993] [2022-11-19 07:06:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449537993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633708409] [2022-11-19 07:06:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:25,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:25,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:25,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:06:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:25,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:06:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:06:25,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:25,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633708409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:25,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:25,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-19 07:06:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732556875] [2022-11-19 07:06:25,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:25,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:25,557 INFO L87 Difference]: Start difference. First operand 12884 states and 17324 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:27,340 INFO L93 Difference]: Finished difference Result 30572 states and 41034 transitions. [2022-11-19 07:06:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-19 07:06:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:27,399 INFO L225 Difference]: With dead ends: 30572 [2022-11-19 07:06:27,400 INFO L226 Difference]: Without dead ends: 17740 [2022-11-19 07:06:27,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:27,423 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 420 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:27,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 290 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:06:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17740 states. [2022-11-19 07:06:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17740 to 17736. [2022-11-19 07:06:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17736 states, 14740 states have (on average 1.3563093622795115) internal successors, (19992), 14779 states have internal predecessors, (19992), 1745 states have call successors, (1745), 1251 states have call predecessors, (1745), 1250 states have return successors, (1743), 1706 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-11-19 07:06:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17736 states to 17736 states and 23480 transitions. [2022-11-19 07:06:29,544 INFO L78 Accepts]: Start accepts. Automaton has 17736 states and 23480 transitions. Word has length 129 [2022-11-19 07:06:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:29,545 INFO L495 AbstractCegarLoop]: Abstraction has 17736 states and 23480 transitions. [2022-11-19 07:06:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 17736 states and 23480 transitions. [2022-11-19 07:06:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:06:29,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:29,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:29,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 07:06:29,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:29,779 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:29,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1432989972, now seen corresponding path program 1 times [2022-11-19 07:06:29,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:29,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933522154] [2022-11-19 07:06:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:06:30,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:30,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933522154] [2022-11-19 07:06:30,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933522154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358930293] [2022-11-19 07:06:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:30,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:30,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:06:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:06:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:06:30,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:30,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358930293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:30,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:30,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:06:30,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726893867] [2022-11-19 07:06:30,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:30,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:30,296 INFO L87 Difference]: Start difference. First operand 17736 states and 23480 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:32,802 INFO L93 Difference]: Finished difference Result 42061 states and 55486 transitions. [2022-11-19 07:06:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-19 07:06:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:32,871 INFO L225 Difference]: With dead ends: 42061 [2022-11-19 07:06:32,871 INFO L226 Difference]: Without dead ends: 24377 [2022-11-19 07:06:32,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:06:32,896 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 418 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:32,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 286 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:06:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24377 states. [2022-11-19 07:06:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24377 to 24373. [2022-11-19 07:06:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24373 states, 20125 states have (on average 1.3279006211180124) internal successors, (26724), 20182 states have internal predecessors, (26724), 2479 states have call successors, (2479), 1769 states have call predecessors, (2479), 1768 states have return successors, (2477), 2422 states have call predecessors, (2477), 2477 states have call successors, (2477) [2022-11-19 07:06:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24373 states to 24373 states and 31680 transitions. [2022-11-19 07:06:35,236 INFO L78 Accepts]: Start accepts. Automaton has 24373 states and 31680 transitions. Word has length 129 [2022-11-19 07:06:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:35,237 INFO L495 AbstractCegarLoop]: Abstraction has 24373 states and 31680 transitions. [2022-11-19 07:06:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:06:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24373 states and 31680 transitions. [2022-11-19 07:06:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 07:06:35,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:35,271 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:06:35,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:35,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:06:35,472 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 990123198, now seen corresponding path program 1 times [2022-11-19 07:06:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364884441] [2022-11-19 07:06:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:06:35,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:35,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364884441] [2022-11-19 07:06:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364884441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914023353] [2022-11-19 07:06:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:35,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:35,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:35,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:06:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:06:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:06:35,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:35,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914023353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:35,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:35,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:06:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974151884] [2022-11-19 07:06:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:35,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:35,922 INFO L87 Difference]: Start difference. First operand 24373 states and 31680 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:38,893 INFO L93 Difference]: Finished difference Result 45233 states and 59079 transitions. [2022-11-19 07:06:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:38,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-19 07:06:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:38,978 INFO L225 Difference]: With dead ends: 45233 [2022-11-19 07:06:38,979 INFO L226 Difference]: Without dead ends: 28039 [2022-11-19 07:06:39,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:39,017 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 97 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:39,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 176 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:06:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28039 states. [2022-11-19 07:06:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28039 to 27771. [2022-11-19 07:06:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27771 states, 23284 states have (on average 1.3023535475004295) internal successors, (30324), 23341 states have internal predecessors, (30324), 2517 states have call successors, (2517), 1970 states have call predecessors, (2517), 1969 states have return successors, (2687), 2460 states have call predecessors, (2687), 2515 states have call successors, (2687) [2022-11-19 07:06:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27771 states to 27771 states and 35528 transitions. [2022-11-19 07:06:42,082 INFO L78 Accepts]: Start accepts. Automaton has 27771 states and 35528 transitions. Word has length 131 [2022-11-19 07:06:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:42,082 INFO L495 AbstractCegarLoop]: Abstraction has 27771 states and 35528 transitions. [2022-11-19 07:06:42,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:06:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 27771 states and 35528 transitions. [2022-11-19 07:06:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 07:06:42,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:42,110 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, 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] [2022-11-19 07:06:42,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:42,311 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash 256901568, now seen corresponding path program 1 times [2022-11-19 07:06:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:42,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464041982] [2022-11-19 07:06:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:06:42,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464041982] [2022-11-19 07:06:42,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464041982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137851834] [2022-11-19 07:06:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:42,383 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:42,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:06:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:06:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:06:42,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:42,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137851834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:42,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:42,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:06:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594469450] [2022-11-19 07:06:42,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:42,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:06:42,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:42,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:06:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:06:42,608 INFO L87 Difference]: Start difference. First operand 27771 states and 35528 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:45,351 INFO L93 Difference]: Finished difference Result 47213 states and 61320 transitions. [2022-11-19 07:06:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:06:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-11-19 07:06:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:45,425 INFO L225 Difference]: With dead ends: 47213 [2022-11-19 07:06:45,425 INFO L226 Difference]: Without dead ends: 27721 [2022-11-19 07:06:45,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:06:45,456 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 108 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:45,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 326 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:06:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27721 states. [2022-11-19 07:06:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27721 to 27387. [2022-11-19 07:06:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27387 states, 22900 states have (on average 1.2780786026200874) internal successors, (29268), 22957 states have internal predecessors, (29268), 2517 states have call successors, (2517), 1970 states have call predecessors, (2517), 1969 states have return successors, (2687), 2460 states have call predecessors, (2687), 2515 states have call successors, (2687) [2022-11-19 07:06:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27387 states to 27387 states and 34472 transitions. [2022-11-19 07:06:48,646 INFO L78 Accepts]: Start accepts. Automaton has 27387 states and 34472 transitions. Word has length 131 [2022-11-19 07:06:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:48,646 INFO L495 AbstractCegarLoop]: Abstraction has 27387 states and 34472 transitions. [2022-11-19 07:06:48,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:06:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 27387 states and 34472 transitions. [2022-11-19 07:06:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-19 07:06:48,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:48,672 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] [2022-11-19 07:06:48,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:48,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:48,873 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1831435764, now seen corresponding path program 1 times [2022-11-19 07:06:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392541296] [2022-11-19 07:06:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:06:49,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392541296] [2022-11-19 07:06:49,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392541296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345967217] [2022-11-19 07:06:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:49,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:49,082 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:49,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16000cd6-9b93-4cea-b106-6b30e938bbe9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:06:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:06:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:49,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:49,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345967217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:49,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:49,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:06:49,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775839093] [2022-11-19 07:06:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:49,365 INFO L87 Difference]: Start difference. First operand 27387 states and 34472 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:06:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:53,510 INFO L93 Difference]: Finished difference Result 54023 states and 68200 transitions. [2022-11-19 07:06:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 133 [2022-11-19 07:06:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:53,575 INFO L225 Difference]: With dead ends: 54023 [2022-11-19 07:06:53,575 INFO L226 Difference]: Without dead ends: 35053 [2022-11-19 07:06:53,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:06:53,596 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 237 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:53,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 453 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:06:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35053 states.